Level Sensors Level Switches Overfill Prevention - FAFNIR Gmbh

Edition 04.12 Technical changes reserved 

Level Sensors 

Level Switches 

Overfill Prevention 

Sensors & Systems Worldwide: www.fafnir.com 

Precision 

Versatility 

Security

FAFNIR – Sensors and Systems 

Reliable, easy to use, universal solutions for 

your level measurement applications 

Are you looking for individual advice from a personal contact, 

regardless of order size? 

2 | FAFNIR – Sensors and Systems 

We offer … 

… the services of a customer focused company with more than 45 years 

experience in the design, manufacture and marketing of filling level 

measurement and separation layer measurement. 

… highly skilled, highly qualified staff who know their craft. 

… a personal contact in our business, who helps to find a solution for your 

level measurement problem. 

… an individual service where we promise you that with us you will always be 

talking to communicative people. 

Are you looking for reliable sensors that last a long time and are easy to install? 

We offer … 

… only tested and calibrated sensors of the highest quality and durability. 

… reliable, tested and field proven sensors. 

… easy to install products: „Plug-and-play sensors“, that reliably measure 

without being adjusted to the liquid 

… Standalone solutions for overfill prevention devices. There is no complicated 

installation required 

Are you looking for solutions for difficult installation conditions? 

We offer … 

… solutions, even where larger suppliers don’t have one. 

… a large range of sensor to meet your individual needs. 

… sensors that fit into the smallest openings (from 3 mm). 

… an innovative team that is only satisfied when an optimal solution has 

been found to your individual problem. 

Are you looking for solutions for extreme process conditions? 

We offer … 

… sensors that work reliably in temperatures up to +450 °C or with up to 

200 bar of pressure. 

… sensors that have a response time of less than 0.2 s and provide information 

about the filling levels with an accuracy of ± 0.3 mm. 

... Products that can measure reliably in hazardous areas, as well as in toxic 

or aggressive media. 

… sensors that provide excellent measuring results in many sticky or high 

viscosity substances. 

Edition 04.12 Technical changes reserved


Inhalt 



Overfill Prevention 

Broad range 

of applications 

TORRIX Page 4 

Magnetostrictive 

Level Sensor 

LS 300 with LS 500 Page 18 

Thermal 

level switch 

With approval as 

overfill prevention device 

Approved for 

hazardous areas 

76 A with NB 220 Page 24 

Thermal 

Overfill Prevention Device 

The stand-alone 

overfill prevention device 

Our solution for 

sticky liquids 

CONDURIX Page 10 

Potentiometric 

Level Sensor 

Application 

specific variants 

Prevention of 

overfilling 

Contents 

| 3

Highly Versatile Solution 

TORRIX 

Magnetostrictive Level Sensor 

The most versatile level sensor in our range, it is 

easy to install and reliable throughout it’s lifetime. 

Forget complicated installations and time 

consuming and costly troubleshooting, TORRIX 

is very easy to use and to troubleshoot. With its 

high-precision magnetostrictive measuring principle, 

it archives an accuracy of up to ± 0.3 mm, 

and is among the very best in its class. 

Installed and tested in the following industries 

» Chemical, petrochemical, liquid gas, pharmaceutical, 

laboratory, off-shore, ship building, 

power plants, energy systems, mechanical engineering, 

process and drinking water treatment. 

Just get started 

» Easy to install and easy to use. TORRIX saves 

your time and even if you have a challenging 

application, troubleshooting is very easy. The 

sensor can even be dry tested without liquids 

before installation. 

Easy to install and 

to configure 

Measurement of the 

separation layer and the 

filling level via HART ® 

TORRIX level sensor in brief 

4 | TORRIX – Magnetostrictive filling level sensor 

2-wire terminal (4 to 20 mA) 

Optional HART ® protocol 

Robust long life design 

Resistant to shock and 

vibration (OIML D11) 

Broad range 

of applications 

A solution for the most difficult installation 

conditions 

» Due to the small sensor head and a small tube 

diameter of only 6 mm, the TORRIX can be installed 

almost anywhere. 

The solution for interface layer measurement 

» Equipped with two floats, the sensors measures 

both the filling and the interface layer very 

precisely, even when an emulsion layer is present 

at the interface. 

Measuring range freely 

configurable along the 

entire probe length 

Use in Ex zone 0 

(ATEX and IECEx approval) 



Attractive examples? 

TORRIX 

TORRIX is already being used successfully here: 

Storage Tanks and Storage Containers 

Interface layer measurements where emulsions are present 

Pilot plant and prototype systems 

System with toxic chemicals 

TORRIX is ideally suited for measuring in all non-adhesive liquids and 

almost all tank geometries. There is no need to adjust the sensor to 

the liquid or the shape of the tank. Another advantage is that there 

are no dead zones in the upper and lower areas. The starting point of 

the measurement is only defined by the size of the float; therefore the 

entire volume can be measured and used. 

When used with HART ® protocol, TORRIX can measure both the 

interface level and the overall level of a tank. Unlike sensors that 

operate on the guided microwave principle, the interface layer can be 

easily recognized even when emulsion is present. 

The TORRIX 6 with his probe diameter of 6 mm and float diameter 

of 27 mm is ideal for applications in smaller containers. Unlike most 

sensors, TORRIX measures in the upper and lower region with no dead 

zone with the threshold point defined only by the float. The TORRIX is 

ideal in applications where frequent changes of media are needed as 

it does not require adjustment. 

The TORRIX can be welded gas tight with any flange and reduce the 

potential for leaks in your system. This allows TORRIX to be used in 

processes with hazardous fluids such as ammonia. 

TORRIX – Examples 

| 5 



Overfill Prevention

TORRIX 

Technical data 

112 

Sensor length 

Installation lenght 

Ø 50 

Housing 

cover 

Sensor 

head 

Probe 

tube Ø 12 

Screw-in unit 

(adjustable) 

Circlip 

6 | TORRIX – Technical data 

Name TORRIX TORRIX flange 

Technical drawing 

112 

52 

Ø 50 

Housing cover 

Cable gland 

Sensor head 

Earth connector 

Screw-in unit 

G ½ WAF 27 

Probe tube Ø 12 

106 

Installation 

lenght 

112 

Ø 50 

Housing cover 

Cable gland 

Sensor head 



Process connection* Height adjustable with Welded: 

Produktschwimmer 

cutting ring coupling: all common threads 

Probe head 

all common threads. 

and flanges 

Protection class IP68 

Material Standard: Stainless steel 303: optional: Stainless steel 316 L 

Cable terminal M16 x 1.5 cable gland for cable diameter 5 to 10 mm; 

optional: ½” NPT threads for conduit cabling; M12 plug 

Ambient temperature 

Probe tube 

- 40 °C to + 85 °C 

Material Standard: Stainless steel 316 Ti; 

optional: Stainless steel 316 L, Hastelloy ® , titanium, tantalum, 

stainless steel 316 Ti coated 

Diameter 12 mm 

Length 

Accuracy 

200 mm to 6,000 mm 

Highest temperature versions up to 3,000 mm 

Filling level ± 0.5 mm or ± 0.025 %, optional ± 0.3 mm or ± 0.01 % 

Resolution (HART ® ) 

Electrical connection 

0.1 mm 

Connection 2-wire 

Voltage 8 to 30 V , Ex version 10 to 30 V DC DC 

Signal Power output: 4 to 20 mA / HART ® 

HART ® functions 

Process conditions 

Float position in mm, cm, m, inches or feet; 

positioning of second float; separation layer (difference between 

floats); sensor status information 

Temperature Normal temperature (NT): - 40 °C to + 125 °C 

High temperature (HT): - 40 °C to + 250 °C 

Highest temperature (HHT): - 40 °C to + 450 °C 

Low temperature (LT): - 65 °C to + 125 °C 

Pressure** 

Options 

0 bar to 120 bar (room temperature) 

0 bar to 95 bar (250 °C) 

0 bar to 82 bar (450 °C) 

Vibration resistant design (to OIML D11) 

High pressure version up to 200 bar 

ATEX and IECEx approval 

Material and calibration certificate 

* See order information page 8 ** Higher pressure version on request. 



TORRIX 6 


112 

Sensor length 

Ø 50 

Sensor 

head 

Probe tube 

Ø 6 

TORRIX 6 Ex NT 

Product float 

Ø 27 x 31 

Name TORRIX 6 TORRIX 6 B 


112 

Ø 50 

Housing cover 

M12 connector 



Process connection* Height adjustable with cutting ring coupling: 

All common threads. 

Bottle unions for all 

common laboratory bottles, e. g. GL45. 

Probe head 


Material Standard: Stainless steel 303; 

optional: Stainless steel 316 L 

Cable terminal M16 x 1.5 cable gland for 

cable diameter 5 to 10 mm; 

optional: M12 plug (see figure) 

Ambient temperature - 40 °C to + 85 °C 

116 

Ø 50 

Housing cover 

M12 connector 

Sensor head 



Probe tube 

Material Standard: Stainless steel 316 Ti: 

optional: Stainless steel 316 L, Hastelloy ® , titanium, tantalum 

Diameter 6 mm 

Length 200 mm to 1,000 mm 

Accuracy 

Filling level 0.75 mm or ± 0.025 % 

Resolution (HART ® ) 0.1 mm 



Voltage 8 to 30 V , DC 

Ex version 10 to 30 VDC Signal Power output: 4 to 20 mA / HART ® 

HART ® functions Float position in mm, cm, m, inch or feet; sensor status information 



Options 



Float** External diameter 27 mm; 

for substances with a density < 0.75 g/mm³; 

Process pressure max. 19 bar 

* See order information page 8 ** Other floats on request. 

TORRIX 6 – Technical data 

| 7 




Floats and 

Process Connections 

Floats 

(Other floats on request.) 

For 

medium 

density 

Float 

density 

Temperature 

range 

8 | TORRIX – Floats and Process Connections 

Max. 

operating 

pressure 

Dimensions in mm 

A H C 

Shape 

Order 

number 

Stainless Steel 316 Ti 

≥ 0.95 g/cm³ < 0.85 g/cm³ - 200 °C to + 250 °C 50 bar 43.0 40.0 15.0 Sphere 909115 





≥ 0.70 g/cm³ < 0.60 g/cm³ - 200 °C to + 250 °C 16 bar 43.0 43.0 15.5 Cylinder 909119 


≥ 0.70 g/cm³ 

Titanium 

< 0.60 g/cm³ - 200 °C to + 250 °C 1 bar 29.5 40.0 12.5 Cylinder 908528 





Hastelloy ® C 276 

≥ 0.70 g/cm³ 

Buna 

< 0.60 g/cm³ - 200 °C to + 250 °C 10 bar 46.0 48.0 15.2 Cylinder 909096 


Process Fittings 

(Other fittings and flanges on request.) 

Fittings, Flanges and Threads 

Description 

Fittings for TORRIX (Ø 12 mm probe tube) 

Material Thread Order number 

Screw-in unit Brass R 1½“ 909097 

Screw-in unit 316 Ti G ½“ 909092 

Screw-in unit (Swagelok ® ) 316 NPT ½“ 909117 

Screw-in unit (Swagelok ® ) 

Fitting for TORRIX 6 (Ø 6 mm probe tube) 

316 G ½“ 909093 

Cutting ring coupling 

Flange 

316 Ti G 3/8“ 909250 

2“ ANSI, 150 lbs 316 Ti 909245 

DN 25, PN 6, DIN 2527, Form B 316 Ti 909238 

DN 50, PN 16, DIN 2527, Form C 316 Ti 909243 

DN 63, PN 16, DIN 2527, Form C 316 Ti 909247 

H 

Ø C 

Ø A 

H 

Ø C 

Ø A 



TORRIX 

Order code 

Version 

TORRIX (order code) – – – – – – – 

Material Stainless Steel 316 Ti SS 

(probe tube) Stainless Steel 316 L SC 

Hastelloy ® C4 C4 

Hastelloy ® B2 B2 

Surface treatment none N 

electropolished E 

Version Standard (12 mm) for variable screw connection SV 

Standard (12 mm) for welded screw connection or flange SF 

Bypass (12mm probe tube) for magnetic level indicator SB 

TORRIX 6 (6 mm probe tube, centred) 6S 

TORRIX 6 B (6 mm probe tube, offset) 6B 

Heavy duty version (18 mm probe tube) SW 

Length / Extra charge for probe or fitting length 

more than 1,000 mm / per 100 mm 

Temperature range Normal temperature (- 40 °C to + 125 °C) NT 

High temperature (- 40 °C to + 250 °C) HT 

Highest temperature (- 40 °C to + 450 °C) HH 

Low temperature (- 65 °C to + 125 °C) LT 

Approvals None NN 

Ex (ATEX and IECEx) Ex 

Electrical output 4 to 20 mA / HART ® HA 

Cable terminal Cable gland (M16 x 1.5) CC 

M12 connector M2 

½ NPT female thread NM 

Accessories (Please indicate in addition to standard order code) 

Description 

½ NPT male thread NF 

TORRIX accessories – – 

Spring for extending the measuring range at the probe end S 

Vibration-resistant version (in accordance with OIML D11) V 

Increased accuracy ± 0.3 mm P 

Certificates 

Description Order number 

Inspection certificate 3.1 in accordance with EN 10204:2004 904495 

Inspection certificate 3.1 with supplier report in accordance with EN 10204:2004 904496 

TORRIX calibration protocol 904498 

Special designs for process connection 

When ordering please specify (nominal diameter DN, nominal pressure PN, standard, shape). 

Variants 

All common flanges Tri-Clamp 

Dairy fitting Other fittings on request 

TORRIX – Order code 

| 9 




Our best solution for sticky liquids. 

CONDURIX 

Potentiometric level sensor 

Even in sticky or dirty liquids, this sensor delivers 

reliable information about the level in the tank. 

Due to the small sensor head and the diameter 

of only 6 mm, you can use the CONDURIX almost 

anywhere. The sensor even functions in highly 

viscous liquids. The CONDURIX can be used in 

all electrically conductive liquids with a conductance 

≥ 1 µS/cm. 

Just get started 

» The sensor is very easy to install and to use 

with no adjustments to the tank or the liquid 

required. 

A solution for interface level measurement 

» The CONDRUIX level sensor is not only designed 

for filling level measurement, but also for 

interface level measurement. 

A solution even for difficult installation conditions 

» Due to the small sensor head and a tube 

diameter starting at 6 mm, the CONDURIX can 

be installed almost anywhere. 

2-wire terminal (4 to 20 mA) 

Measuring result 

independent from pressure, 

temperature and density 

CONDURIX in brief 

Filling level or 

separation layer detection 

Response time of 

0.2 seconds 

Use in all electrically 

conductive liquids ≥ 1 µS/cm 

10 | CONDURIX – Potentiometric filling level sensor 

CONDURIX 

CONDURIX DU 

Our solution for 

sticky liquids 

Ideal for adhesive and sticky liquids 

» The CONDRUIX functions even in highly-viscous 

fluids such as hot ceramic silt or hand cream. 

Even heavily contaminated liquids, such as waste 

water have no influence on the measurement. 

Robust design 

for long life time 

Measuring range freely 

configurable along the 

entire probe length 

ATEX approval for zone 0 




CONDURIX 

Below are examples of where the CONDURIX is being used successfully: 

Sticky and viscous media 

Aqueous solutions 

Other applications 

Acrylic glass manufacturing 

The level measurement capability of CONDURIX is not affected by 

buildup on the sensor so it can be used to measure the sticky and 

strongly adherent precursors in the manufacture of acrylic glass. 

Production of cream 

Similar to the acrylic glass manufacturing creams, gels and other 

strong adhesive media present a major challenge for level measurement. 

Once again, the CONDURIX is ideally suited to the applications 

because attachment of the media does not affect the measurements 

on the sensor. 

Bioreactors 

CONDURIX is easily cleaned and is available with a hygienic process 

connection making it ideal for measuring the level in aqueous solutions 

used in bioreactors. Another strength of the sensor is that it is 

already available from a length of 150 mm and at the lower end, has 

a dead zone of only 3 mm. The CONDURIX is therefore well suited for 

use in test and pilot plants. 

Wastewater treatment 

CONDURIX is ideal for level monitoring in wastewater treatment systems 

because the measurement is comprimised neither by dirt nor by 

crystallisation. 

Water detection 

For the monitoring of fluids, such as the detection of water in the 

filter system for aviation fuel, the CONDURIX can be successfully used 

since it will selectively measure only the conductive liquid (water). 

CONDURIX – Examples 

| 11 




CONDURIX 


ca. 170 

112 

Sensor length 

Measuring range 

6 

5 

Ø 50 

Sensor head 

SW 36 

Plug R ¾“ 

Probe tube 

Ø 6 or 12 

CONDURIX Mono R 1" 

12 | CONDURIX – Technical data 

Ø 50 

Name CONDURIX Mono CONDURIX DU 



Process connection* All common flanges and 

threads from R ¾ 

Probe head 


Material Standard: Stainless steel 303 

All common flanges and 

threads from R 1½ 


optional: ½" NPT threads for conduit cabling; M12 plug 

Ambient temperature 

Probe tube 

- 40 °C to + 85 °C 

Material Standard: Stainless steel 316 Ti: optional: Stainless steel 316 L; 

Hastelloy ® 

Diameter Probe length to 1,400 mm: 6 mm 

CONDURIX Mono Probe length R 1" from 1,401 mm: 12 mm 

Length 

Isolation 

150 mm to 6,000 mm 250 mm to 6,000 mm 

Normal temperature (NT) PTFE 

Accuracy 

Filling level ± 1 mm or ± 1 % 


Sensor length 


6 

5 

Deckel mit SW 19 

demontierbar 

Kabelverschraubung 

M16 x 1,5 

Sensor head 

SW 36 

Plug R ¾“ 

Probe tube 

Ø 6 or 12 





HART ® functions Filling level in mm, cm, m, inch or feet; 

Configuration: Sensor status information 



Pressure NT: 0 bar to 120 bar (room temperature); 0 bar to 25 bar (125 °C) 

Options 

ATEX approval 


* See order information for process connection page 14. 

Ø 50 

Sensor length 

29 

Installation length 

CONDURIX (Ex) F DU 

Deckel mit SW 19 

demontierbar 

Kabelverschraubung 

M16 x 1,5 

Sensor head 

Kennzeichnung gelasert 


Probe tube 

Ø 6 or 12 

Counter 

electrode 

Ø 24 



CONDURIX 


112 

Adjusting 

range 


10 

Ø 50 

Sensor head 

Swagelok 

NPT ¼“ 

Jacketed 

pipe Ø 8 

CONDURIX MA NT Ø8 

112 

Ø 50 

Name 


CONDURIX MA with external housing 


10 

Housing 

Swagelok 

NPT ¼“ 

Jacketed pipe Ø 8 

Adjusting 

range 


10 

Housing cover 

with SW 19 

(dismountable) 

LEMO-plug 

Cable gland 

M16 x 1,5 

Sensor head 


Jacketed 

pipe Ø 8 

Process connection* All screw-in units from R ¾ 

Probe head 


Material Standard: Stainless steel 303 


optional: ½" NPT threads for conduit cabling; M12 plug 


CONDURIX MA NT Ø8 

Probe tube 

Material Standard: Stainless steel 316 Ti; 

optional: Stainless steel 316 L; Hastelloy ® 

Diameter Probe tube: 4 mm; 

Jacketed pipe: 8 mm 

Length 150 mm to 750 mm 

Isolation 

Normal temperature (NT) PTFE 

Accuracy 

Filling level ± 1 mm or ± 1 % 


Ø 50 

Mounting bracket 

60 x 60 x 5 





HART ® functions Filling level in mm, cm, m, inch or feet; 

Configuration: Sensor status information 



Pressure NT: 0 bar to 120 bar (room temperature); 

0 bar to 25 bar (125 °C) 

Options 

ATEX approval 


* See order information for process connection page 14. 

CONDURIX – Technical data 

112 

| 13 



CONDURIX 

mit externem Gehäuse 


CONDURIX 

Order code 

Version 

CONDURIX (order code) – – – – – – – – 

Material (probe tube) 

Stainless Steel 316 Ti SS 

Stainless Steel 316 L SC 



Surface treatment None N 

14 | CONDURIX – Order code 

Electropolished E 

Version Single-tube version Mono MO 

Two-tube version DU DU 

Jacketed pipe with 8 mm external diameter MA 

Housing Standard S 

Offset housing A 

Offset housing, plug-in 



P 

Temperature range 

Single-tube version Mono 

Two-tube version DU 

Normal temperature (- 40 °C to + 125 °C) NT 

Approvals None NN 

Ex (ATEX) Ex 

Electrical output 4 to 20 mA / HART ® HA 

Cable terminal Cable gland CC 

M12 connector M2 

½ NPT female thread NM 

½ NPT male thread NF 

Standard gland 

Description Order code 

R ¾“ (mono only) 909285 

R 1½“ 909129 

2“ NPT 909284 

3“ ANSI 909282 

DN 25, PN 6, DIN 2527, Form B 909283 

Certificates 

Description Order code 

Inspection certificate 3.1 in accordance with EN 10204:2004 904495 

Inspection certificate 3.1 with supplier report in accordance with EN 10204:2004 904496 

Special designs for process connection 

When ordering please specify (nominal diameter DN, nominal pressure PN, standard, shape). 

Variants 

All common flanges Tri-Clamp 

Dairy fitting Other fittings on request 



Accessories 

Meets even the highest requirements. 

HPH Ex d 

High Pressure Connection Housing 

The HPH Ex d is a pressure resistant, encapsulated 

connection housing with safety barriers for connecting 

our intrinsically safe sensors without an additional 

ex separator. With an optional display, the output 

signal can be shown in percentage format. For 

optimum readability, the digital display is illuminated 

and can be adjusted to any viewing position. 


Operating data: 

Ambient temperature: 

- 40 °C to + 85 °C 

Protection class: IP68 

Power supply: 

14 to 26 V without display 

17 to 29 V with display 

Voltage drop: 

0.4 V without display; 0.7 V with display 

Accuracy: 0.1% (4 to 20 mA) 

Display: 

3-digit display, 10 mm; 

0.0 % (4 mA) to 100 % (20 mA) 

Display range: - 9.9 % to + 199 % 

Order numbers 

On site display for level 

indication 

Corrosion resistant 

(stainless steel 1.4305) 

85 

Adjustable display 

10 mm LED display 

Easy to install 

Output: 

Output signal: 4 to 20 mA 

Electrical connection: M20 x 1.5; 

other threads on request 

Suitable for use in Ex zone 1 

(ATEX and IECEx approval) 

Dimensions in mm: 

HPH Ex d in brief 

170 

Screwed cable gland (not included) 

72.5* 

* with Display: 72,5 

without Display: 65,5 

Bezeichnung Order number 

Pressure-resistant housing HPH Ex d (with display) 909208 

Pressure-resistant housing HPH Ex d (without display) 909213 

Intrinsically safe power 

supply for Ex-Zone 0 


Robust design 

Accessories – HPH Ex d 

| 15 




Accessories 

Stand-alone transducer with 5 relay outputs. 

UM-X 

The control unit in a field housing for continuous level sensors 

With the UM-X transducer in a field housing, we 

offer a convenient, stand-alone display for your level 

measurement. It has five relay outputs, all of which 

have freely configurable switching thresholds. The 

compact design and the possibility of connecting 

directly to 230 V makes it easy to handle and install 

even outside a control cabinet. 


Operating data: 

Auxiliary power: 

230 V AC , 115 V AC , 24 V DC or 24 V AC 

Maximum power input: < 5 W, < 8 VA 

Ambient temperature: - 20 °C to + 50 °C 

Protection class: IP64 

Sensor electrical circuit: 

4 to 20 mA; U Nenn = 24 V; short-circuit-proof 

Order numbers 

Easy menu-driven 

graphical user interface 

Can be used with all sensors 

with a 4-20 mA interface 

Intrinsically safe electrical 

circuit with ATEX approval 

(Ex ia) 

16 | Accessories – UM-X 

UM-X in brief 

Output: 

Five relays each with potential-free changeover 

contact 

Load: 

AC: U ≤ 250 V, I ≤ 5 A, P ≤ 100 VA 

DC: U ≤ 250 V, I ≤ 250 mA, P ≤ 50 W 

Dimensions in mm: 

H 130 x W 180 x D 50 

Variant Description Order code 

UM-S Standard field display, 230 VAC 908046 

UM-S Standard field display, 24 VDC 908047 

UM-O Approved as overfill prevention device in connection with TORRIX, 230 VAC 908044 

UM-O Approved as overfill prevention device in connection with TORRIX, 24 VDC 908050 

UM-Ex Intrinsically safe sensor circuit (Ex ia), 230 VAC 908043 

UM-Ex Intrinsically safe sensor circuit (Ex ia), 24 VDC 908049 

UM-O Ex 

UM-O Ex 

Intrinsically safe sensor circuit (Ex ia) and 

approved as overfill prevention device in connection with TORRIX, 230 VAC Intrinsically safe sensor circuit (Ex ia) and 

approved as overfill prevention device in connection with TORRIX, 24 VDC 908045 

908048 

115 V and 24 V on request. 

AC AC 

Combined with TORRIX, 

approved as an overfill 

prevention fulfilling the 

requirement of the German 

Water Resources Act (WHG) 

Pump control (alternating) 

Continuous displaying the 

filling level 

Filling levels can be displayed 

in mm, inches, % or mA 



Accessories 

The inventory of your solvents and chemicals at a glance. 

LOGI-Command 

Liquid level control for decentralised systems 

LOGI-Command is the heart of the FAFNIR LOGI 

system. It supplies information about filling levels 

and other relevant parameters for all types 

of laboratory bottles, tanks and containers. 

With the information delivered by LOGI-Command, 

it is possible to plan, manage and optimise 

the supply and disposal of liquids. The LOGI- 

Command GUI contains an intrinsically safe 

power supply for the FAFNIR level sensors. 

Various interfaces ensure that it always has access 

to the latest data. 

Controller and sensors in 

one system 

Continuous measuring and 

recording of all data 

FAFNIR‘s LOGI system offers comprehensive monitoring 

of media in the laboratory, is your total 

solution for all aspects of level gauging and liquid 

management and offers total monitoring of 

all your liquids and chemicals. The FAFNIR LOGI-X 

Convenient display of your 

inventory. 

Flexible due to a modular architecture, 

easy to upgrade 

LOGI-Command 

LOGI-Command in brief 

Approved intrinsically safe 

sensor power supply 

Direct access to your 

inventory data from a 

web interface. 

Connection 

options and 

communication 

system has all essential functions, such as the 

visual representation of liquids, alarm emails and 

alarm reports. FAFNIR sensors measure liquid 

levels with a high precision, e. g. in solvents, acids 

and alkaline solutions. 

Control of components, 

e.g. pumps or valves, 

by relay outputs 

Easy to install and to setup 

Accessories – LOGI-Command 

| 17 




Knows when it’s enough! 

LS 300 with LS 500 

Thermal limit switch with ATEX approval 

With our limit switch, the overfilling of tanks 

and process containers is prevented. It consists 

of a sensor (LS300) installed inside the tank and 

a transducer (LS500) with an output relay. For 

water-polluting liquids, this overfill prevention 

device is an indispensable component for environmental 

protection. 

Installed and tested in the following applications 

» Full and empty notifications in process containers, 

storage tanks, above-ground tanks, 

IBCs, tank wagons, vats, bottles and retention 

ponds. 

Dependable 

» The overfill prevention device fulfils the requirements 

of the German Water Resources Act 

(WHG). 

Durable 

» There is no abrasion since there are no moving 

parts. A long life time is guaranteed with 

consistent reliability. 

Proven millions of times in 

many applications 

Polarity-independent 

two-wire cable to the 

transducer 

18 | LS 300 with LS 500 – Thermal limit switch 

LS 300 with LS 500 in brief 

Permanent self-testing of 

the sensors 

Space-saving, robust and 

corrosion-free design 

No moving parts 

Application 

specific variants 

Always fits 

» There is almost no installation condition 

for which we have not developed a sensor. 

Whether adaptable, bent or flexible, as an 

intermediate flange, only 3 mm in diameter or 

with DN 200 flange; we have a solution. 

Easy to get started 

» Easy installation with a 2-wire terminal to the 

transducer, fitted independent of polarity. 

The sensor requires no maintenance after the 

installation, therefore there are no hidden 

costs! 

No on-site calibration 

required 

Maintenance-free 

Approved for Ex zone 0 

Approved as overfill prevention 

device 




Limit sensors and overfill prevention devices 

Below are examples of where the LS 300 and 76A are being used successfully: 

Overfill prevention 

Sumps 

Pilot plant and prototype systems 

Tank Arm During Filling 

The FAFNIR overfill prevention solutions can be used in all storage containers. 

Whether it‘s a storage tank with a volume of over 1,000 litres, 

or several smaller containers, Fafnir has the appropriate overfill prevention. 

For hazardous liquids our LS 300 with the LS 500 is used. For nonhazardous 

liquids the 76 A comes with the NB 220. 

For safety reasons, many containers from a 1 litre bottle in the safety 

cabinet up to free-standing, large containers are placed in sumps. 

This is done to prevent escape of liquid into the environment in the 

event of a bottle breakage or leakage of liquid. A potential risk with 

this application is evaporation of the liquid causing an explosive 

atmosphere. By monitoring the tub with the LS 300 in combination 

with the LS 500, you will be informed of the escape of fluids. 

The LS300 with its probe diameter of 3 mm is ideal for use in the small 

glass containers used in pilot plants and prototype systems. Unlike other 

sensors, the LS 300 requires little space to install, has a lightweight head 

to minimise tipping and can have its electronics separately mounted in 

a cabinet. 

Additionally, the LS 300 overfill sensor is suited perfectly for use as a 

fill limiter or as an additional safety device used in combination with a 

flow measurement device for automatic filling of tankers or other large 

containers. The sensor is as flexible as the tank arm, requires little space, 

has a lightweight head and can have its electronics separately mounted, 

there is no need to build your system around a sensor, but instead 

the sensor can be built around your application. 

LS 300 with 76 A – Examples 

| 19 




LS 300 

General 

Name LS 300 

Process temperature Standard: - 25 °C to + 50 °C 

Process pressure 0 bar to 25 bar 

Immersion switch delay < 2 s 

20 | LS 300 – Technical data 

High temperature: - 25 °C to + 80 °C 

Low temperature: - 40 °C to +50 °C (pressure-free) 

Heating-up time at - 20 °C < 2 min., at + 60 °C < 15 s 

Probe tube 

Wetted parts Stainless steel 316 Ti, 316 L; Hastelloy ® C4, C22; Hastelloy ® B2, B3 

Standard variants 

Name LS 300 Standard LS 300 Heavy Duty LS 300 Duo 


Connection housing 

42 

18 

35 

Sensor length 

Threshold length 

12 

24 

90 

Ø 10 

Type LS 300 EU 

SW 51 

Cable gland 

M16 x 1,5 

SW 22 

G 3 /8 

Probe tube 

Ø 12 

Threshold point 

100 


24 

46 

Ø 88 

Ø 24 

Standaufnehmer 

LS 300 FSU 

Sonderausführung 

SW 17 

Earth 

connector 

SW 10 

Cable gland 

M16 x 1,5 

Flange 

to order 


Material Brass chrome-plated Stainless steel Brass chrome-plated 

Casing protection class IP67 

Cable terminal Screw terminal with cable gland 

Probe tube 


Outer diameter 10 mm Level Sensor 

24 mm LS 2 x 300 10 mm DUO 

Process connection 

Gland G 3/8” G 1” 

Flange DN 15 DN 25 

Options pneumatic test 

connection 

pneumatic test connection 

with check valve 

Threshold length 2 

24 

13 

Ø 12 


24 



LS 300 

Pluggable Versions 

For vehicles, tank containers, and tanks which are moved frequently, we also offer our limit switches 

with a plug. This allows a quick coupling and decoupling of the limit switch. 

Name LS 300 FUC Duo LS 300 FUSCP Duo LS 300 Ex Steck (Duo) 


115 

Ø 88 

Special Designs 

Threshold length 1 125 


Level sensor 

LS 300 FU Duo Steck 

für LS 300 DUO Steck 

We offer a variety of special designs that are designed where space is limited mit Einschraubkörper or installation verschweißt condi- 

Entleerung 185 Literfass 

tions are difficult and challenging. 

Here are some examples from our portfolio of special designs – challenge us ! 

Name 


LS 300 compact Laboratory LS LS 300 Flex 

40 

50 

Ø 10 

Ø 6 

Junction box 

Cable 

2 x 0,75² blue 

5 m long 

SW 14 

R¼ 

29 

Length 


18 

2 

Ø 3 

Cable 2 x 0,75 mm² 

Ø 12 




Cable terminal 

Probe tube 

Cable is moulded and fixed 

Outer diameter 6 mm 3 mm 10 mm 


LS 300 

in Sonderausführung Ø3 

Minimal gland R ¼” – – 

SW 17 

Junction box 

Ball cock 



Cable terminal DD 28 plug connection M12 connector 


Probe tube 

LS 300 FSPU Steck 

Outer diameter 


2 x 10 mm 24 mm 12 mm 

Minimal gland G 1” G 1” G 3/8” 

Minimal flange DN 25 DN 25 – 

155 

24 Threshold length 

Ø 24 

Earth 

connector 

300 – 500 mm 

86 

24 



Corrugated hose 

ca. 10 

ca. 

31 

24 

3 50 

Ø 21,3 

Ø 10 

LS 300 mit Wellschlauch 

Ø 12 

SW 22 

G3/8 Threshold point 1 

Threshold point 2 

3 m Cable 


Ø 12 

LS 300 – Technical data 

| 21 




LS 300 

Level sensor 

Order code 

Version 

LS 300 (order code) 

Material (probe tube) 

– – – – – – – – 

Stainless Steel 316 Ti SS 

Stainless Steel 316 L SC 

Hasetlloy ® C4, C22 C4 

Hasetlloy ® B2, B3 

Version (probe tube) 

B2 

Standard Ø 10 mm A 

Heavy duty Ø 24 mm 


S 

Screw-in units (G3/8“ with A; G1“ with S) EU 

Flange (DN 15) Probe tube standard FU 

Flange (DN 25) Probe tube heavy FU 

Other screw-in unit AE 

Other flange 



AU 

Standard version 

Heavy duty version 

Temperature range 

Normal temperature (- 25 °C to + 50 °C) N 

High temperature (- 25 °C to + 80 °C) H 

Low temperature, pressure-free (- 40 °C to + 50 °C) K 

Pressure range 

0 to 3 bar 03 

0 to 6 bar 06 

0 to 10 bar 10 

0 to 16 bar 16 

0 to 25 bar 25 

Protective sleeve 

None N 

For vapour movement G 

For strong vapour movement S 

Cable terminal 

Cable gland CC 

Plug connection DD 28 DD 

Moulded cable FC 

Pneumatic test connection None N 

Including P 

Including check valve R 

Other versions and special requirements on request. 

22 | LS 300 – Order code 



Knows when it’s enough! 

LS 500 

Transducer 


Name LS 500 LS 500 19 Inch Module LS 500 19" Duo 

Number of 

connections 

Order code 

Version 

Version 

Options 

Function 

Auxiliary power 

Order numbers 

1 Level sensor 2 Level sensor 

Auxiliary power 230 V ; 115 V ; 24 V ; 24 V AC AC DC AC 

Power input max. 5 W max. 10 W 

Ambient 

temperature 

Casing protection 

class 

- 25 °C to + 50 °C 

IP40 n. A. 

Dimensions H 150 x W 75 x D 110 [mm] Euroboard 160 x 100; 7 TE 

Outputs Potential-free changeover contact: AC: U ≤ 250 V, I ≤ 4 A, P ≤ 100 VA 

DC: U ≤ 250 V, I ≤ 250 mA, P ≤ 50 W 

Output 1 Response to level sensor 1 

LS 500 LS 500 19“ 

Output 2 Optional: Option Z (response to level sensor 1); 

Option S (dysfunction) 

Options Approval for LPG Approval in accordance with AK5 

LS 500 

LS 500 19 Inch Module 

LS 500 19" DUO (no option possible) 

LS 500 – – – 

Name Version Order code 

LS 500 LPG 230 V AC 904855 

LS 500 19" AK5 24 V DC 904895 

LS 500 19" AK5 24 V AC 904896 

ST 

19 

DU 

None 

Option Z 

Option S 

Response to 

level sensor 2 

N 

Z 

S 

Overfill prevention device 

Dry run protection 

U 

T 

230 V AC 

115 V AC 

24 V DC 

24 V AC 

230 

115 

24D 

24 A 

LS 500 – Technical data, Order code 

| 23 




Easy to use and reliable 

76 A with NB 220 

Thermal overfill prevention device, fulfilling the requirements of 

the German Water Resources Act (WHG) 

The ideal solution for overfill prevention of your 

tanks for water-polluting liquids. With its easy 

installation and the option of connecting acoustic 

or optic signals directly to the transducer the 

overfill prevention has proven its reliability for 

years. 

Easy to get started 

» Easy installation with a 2-wire terminal to the 

transducer, fitted independent of polarity. 

The sensor requires no maintenance after the 

installation, therefore there are also no hidden 

costs! 

Durable 

» There is no abrasion since there are no moving 

parts. A long life time is guaranteed with consistent 

reliability. 

Proven millions of times in 

many applications 

Approved as overfill 

prevention device 

76 A with NB 220 in brief 

No moving parts 

Easy installation 

Permanent self-testing of 

the sensors 

24 | 76 A with NB 220 – Thermal overfill prevention device 

Prevention of 

overfilling 

Highly dependable 

» The overfill prevention device fulfils the requirements 

of the German Water Resources Act 

(WHG). 

Installed and tested in the following applications 

» Full notifications in fuel oil tanks, day oil tanks, 

tall tanks, oil containers, sumps or bottles. 

Maintenance-free 

The ideal solution for 

containers containing 

water polluting liquid. 



Typ 76 


Probe length 80 

28 


Typ 76 N 

SW 52 

Ø 16 

Name 76 

SW 52 Process temperature Standard: - 25 °C to + 50 °C 

High temperature: - 25 °C to + 80 °C 

Process pressure 0 bar to 2 bar 

Immersion switch delay < 2 s 

Heating-up time at - 20 °C < 2 min. 

at + 60 °C < 15 sec. 

Material 

Connection housing Brass 

Wetted parts 

(without test prod) 

Brass; 

Spring steel, zinc-plated 

Solder: L-Sn 40 Pb; Vulkolan 

Test prod Linear polyester; stainless steel 303 to 316 Ti 


Cable terminal Cable gland 

Probe tube 

(Outer Ø) 

24 mm 

Probe length 100 to 3,000 mm 

Gland G ¾” 

Overvoltage protection (76 A, 76 N) 

Designs 

76 A 76 C 76 N 


28 


Typ 76 N 

Ø 16 

Fixing screw 

SW 27 

G ¾ 

Our standard device for all 

applications, easy to install with a 

reverse polarity protected cable. 


10 

28 


Ø 16 

Cable LiYY 2x1 

Standard 3 m long 

Fixing screw 

SW 27 

G ¾ 


The version with a permanently 

installed cable, for applications 

where there is no space for the 

enclosure, Niveaustandgeber or for OEM applications 

Typ 76 C 

with a pre-configured cable. 


28 


SW 52 

Typ 76 N 

Ø 16 

Fixing screw 

SW 27 

G ¾ 

All parts exposed to liquid are 

manufactured from stainless steel 

316 Ti. The enclosure is nickel 

plated; this means the sensor is 

suitable, for example, for AdBlue. 

Type 76 – Technical data 

| 25 




Typ 76 

Tried and tested in the following liquids: 

1. For flammable, 

water-polluting liquids 

Diesel / Biodiesel 

EL fuel oil 

Used transmission and engine oils 

1-hexanol 

Nitrobenzene 

Ethyl acetoacetate 

1,2-dichlorobenzene 

2,4-dimethylaniline 

(N,N-dimethylaniline) 

Acrylic acid-2-ethylhexyl ester 

(2-ethylhexyl acrylate) 

Cyclohexyl acetate 

Benzaldehyde 

Diethyl oxalate 

Methyl acetate 

n-octanol (n-octyl-alcohol) 

Aniline 

Order numbers 

26 | Type 76 – Order numbers 

2. For non-flammable 

water-polluting liquids 

Unused engine, 

transmission and hydraulic oils 

Transformer oils 

Vegetable oils 

Anti-freeze liquids 

Oil-water mixtures 

(e. g. drilling and lubricating oils) 

Detergent water mixtures 

Per- and trichloroethylene 

Urea solution 

Name Description Probe length Order code 

76 A 

Standard 100 mm 904372 









Standard 1,000 mm 904457 

Customer-specified length (with statement of the length) 904365 

76 C 908332 

Compact: Probe length 500 mm, cable length 3 m 

76 N 901393 

Stainless steel 316 Ti: for use in Ad Blue, probe length 500 mm 



Knows when it’s enough. 

NB 220 

Transducer 

Installing this stand-alone device is very easy. 

We have the right solution for you, whether as a 

simple relay output for connection of an PLC 

(NB 220 H), as a stand-alone solution with an 


additional integrated optical and acoustical 

alarm (NB 220 QS and NB 220 QSF), or even with 

switched 230 V to directly connect an electrical 

consumer as i.e. a pump (NB 220 QS). 

Name NB 220 H NB 220 QS NB 220 QSF 

Number of connections 1 Level Detector 

Auxiliary power 230 V ; 115 V ; 24 V ; 24 V AC AC DC AC 

Power input max. 6 W or 4 VA 



Dimensions H 110 x W 51 x D 110 [mm] H 150 x W 75 x D 110 [mm] H 163 x W 97 x D 62 [mm] 

Outputs Potential-free changeover Switched power supply Potential-free changeover 

contact: 

(NO) 

contact: 

AC: U ≤ 250 V, I ≤ 4 A, 

AC: U ≤ 250 V, I ≤ 4 A, 

P ≤ 100 VA; 

P ≤ 100 VA; 

DC: U ≤ 250 V, I ≤ 250 mA, 

DC: U ≤ 250 V, I ≤ 250 mA, 

P ≤ 50 W 

P ≤ 50 W 

Output 1 not acknowledgeable 50 W, e. g. pump, 

not acknowledgeable 


Output 2 – 100 W, e. g. lamp, 


acknowledgeable 

Output 3 – 50 W, e. g. external horn, 

acknowledgeable 

– 

Input – Connection for external potential-free acknowledge button 

Acoustic signal – integrated horn 

Acknowledge button – integrated acknowledge button 

Test button – – available 

Option Dry-running protection 

Order numbers 

Name Description 

Order number 

230 V | 24 V / 24 V AC DC AC 

NB 220 QSF Overfill prevention device 908400 908508 

NB 220 QS Overfill prevention device 902330 904501 

NB 220 H Overfill prevention device 902279 902293 

NB 220 QS T Dry-running protection 904310 n.A 

NB 220 H T Dry-running protection 902309 902323 

115 V on request. 

AC 

NB 220 – Order numbers 

| 27 




Accessories 

Acknowledgement unit type QE 200 


Collective acknowledgement unit type SAM 8 


28 | Accessories – Overfill preventions 

The acknowledgement unit extends the functionality of the LS 500 

and NB 220 H transducer with an acknowledgement function, acoustic 

alarm and additional optical alarm. 

Function description 

The acoustic alarm can be acknowledged and ended by pressing a 

button. The optical alarm remains active until the reason for the 

response is eliminated. 

Name Type QE 200 

Auxiliary power 230 V ; 24 V AC DC 

Power input max. 2 VA, 2 W 



Dimensions H 110 x W 50 x D 125 [mm] 

Outputs switched auxiliary energy; 1 x optical alarm, 1 x acoustic alarm; 

Load: together, max. 100 W 

Inputs Acknowledgement button (NO), control input (for connecting the LS 500 or the NB 220 H) 

Order numbers 

Name Description Order code 

Type QE 200 Extension of the transducer LS 500, NB 220 H, 230 VAC 902347 

Type QE 200 Extension of the transducer LS 500, NB 220 H, 24 VDC 902348 

The collective acknowledgement unit can connect to a maximum of 

8 transducers. The switch signal of an individual transducer from a 

cascade triggers an acoustic alarm. 

Function description 

The acoustic alarm can be acknowledged and ended by pressing a button. 

The optical alarm remains active until the reason for the response 

is eliminated. Upon retriggering, or triggering of a second transducer, 

the acoustic alarm is started again and can be acknowledged. 

Name Type SAM 8 

Auxiliary power 230 VAC Power input 8 VA 

Ambient temperature + 5 °C to + 40 °C 


Dimensions H 75 x W 100 x D 63 [mm] 

Outputs 230 V switched; 1 x acoustic alarm; load: max. 1 A 

Inputs Acknowledge button (normally closed contact), breaking capacity: 230 V (50 Hz), 10 mA; 

Switching input; breaking capacity: 230 VAC (50 Hz), 1,7 mA 

Order number 


Type SAM 8 8 Inputs 907243 



Accessories 

Horns and Lights 

In connection with an acknowledgement unit, acoustic and optical alarms can be operated individually. 


Name Horn 

Type HPW 110 

Wall mounting 907 Z 

Horn 

Type HR 

Rotating light 

Type R4 

Auxiliary power 230 V ; 24 V AC DC 

Power input max. 20 VA 12 VA Motor: 5 W; Light: 25 W 

Acoustic pressure 108 dBA 92 dBA 

Ambient temperature - 20 °C to + 60 °C - 20 °C to + 50 °C - 25 °C to + 50 °C 

Protection class IP55 IP33 IP54 

Dimensions H 356 x Ø 152 [mm] H 256 x Ø 78 [mm] H 200 x Ø 151 [mm] 

Alarm signal acoustic acoustic and optic optic 

Mounting option Wall mounting 

Order numbers 


Horn type HPW 110 Acoustic alarm system, 230 VAC 902378 

Acoustic alarm system, 24 VDC 902379 

Horn type HR Acoustic and optic alarm system, 230 VAC 905294 

Acoustic and optic alarm system, 24 VDC 905295 

Rotating light type R4 Optic alarm system, 230 VAC 902422 

Optic alarm system, 24 VDC 902423 

In combination with the wall mounting 907 Z, our overfill prevention 

device (76 with NB 220) can be used as limit sensor for filling from 

a tank truck. The plug in the wall mounting serves as the counterpart 

for the 903 junction boxes usually found in the tankers. The wall 

mounting is connected to the relay output of the NB 220. This allows 

the overfilling to be signaled back to the tank truck. 

Order numbers 


Wall fitting 907 Z 230 VAC, wall mounting for interruption of 

the filling process (not for use in explosive area) 

903721 

24 VDC, wall mounting for interruption of 

the filling process (not for use in explosive area) 

903720 

Bracket for standard rails DIN mounting rail brackets for LS 500, 

NB 220 H, NB 220 QS and QE 200 

907465 

Type BA 350 Overvoltage protection (2-pole) 903313 

Type BA 350 Duo Overvoltage protection (4-pole) 903314 

Counter plug type S28 For plug-in connection DD 28 903443 

Zubehör – Überfüllsicherungen 

| 29 




30 | 



FAFNIR – Quality and Satisfaction 

Company: 

FAFNIR GmbH, based in Hamburg, Germany, 

has over 45 years of experience in the development 

and production of filling safety devices, 

overfill prevention solutions, limit signal controllers 

and continuous level gauging solutions 

for all types of liquid. 

The optimisation of process controls, improvements 

in cost efficiency and the protection of 

people and the environment are at the heart of 

our business. 

Our close and trusting relationship with our 

customers is a key factor in the practice- oriented 

implementation of innovative ideas and the 

functionality of our products. 

Quality for your satisfaction: 

To provide all customers with products of consistently 

high quality, FAFNIR has for many years 

operated an internationally recognised, comprehensive 

quality management system that meets 

the requirements of ISO 9001 (EN 29001). Our 

expertise in the development and manufacture 

of explosion-proof equipment is certified by an 

independent body. All our products are subject 

to strict FAFNIR quality requirements. We are 

committed to meeting international standards 

and applicable EU directives. 

FAFNIR – Quality and Satisfaction 

| 31

FAFNIR GmbH 

Bahrenfelder Straße 19 

22765 Hamburg 

Phone: +49/40/39 82 07-0 

Fax: +49/40/390 63 39 

E-mail: info@fafnir.com 

Internet: www.fafnir.com 

Sensors & Systems Worldwide: www.fafnir.de

Level Sensors Level Switches Overfill Prevention - FAFNIR Gmbh

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