Pressure and temperature measuring instruments for hazardous areas

Product Review 

Pressure and temperature measuring 

instruments for hazardous 

areas

Part of Your Business 

Contents 

2 

Our Services 3 

Electronic Pressure Measuring Instruments 4 

Mechatronic Pressure Measuring Instruments 6 

Mechanical Pressure Measuring Instruments 12 

Electronic Temperature Measuring Instruments 16 

Mechatronic Temperature Measuring Instruments 20 

Mechanical Temperature Measuring Instruments 21 

Calibration Technology 22 

Accessories 23 

Technical Information 24 

WIKA worldwide 28 

The modern high-bay 

warehouse ensures 

efficient logistics 

Fully automatic 

production of 

measuring devices 

Ability to meet any Challenge 

Our knowledge for your success 

In the course of the last six decades the name WIKA has 

become a symbol for sophisticated solutions in the field of 

pressure and temperature measurement. 

Our ever increasing ability is the basis for implementation of 

innovative technologies in the form of reliable products and 

efficient system solutions. 

Our top ranking in the world market today owes itself to the 

consistent devotion to ensure first class quality backed by 

6,000 employees in the WIKA group of companies. Right 

from the outset more than 500 experienced distribution 

employees alone ensure that our customers are competently 

advised and individually serviced throughout the world. 

Certified quality 

The WIKA quality assurance management system has been 

certified in accordance with ISO 9001:2000 since 1994. 

The quality and safety standards of our company meet the 

standard systems of several countries. 

Made by WIKA 

The development and high-tech production in our owned 

modern production facilities (Germany, Brazil, China, India, 

Canada, Poland, Switzerland, South Africa and U.S.A.) is 

the best warranty for our flexibility. 

Whether SMD automatic insertion machines, CNC auto- 

matic machining centres, welding robots, laser welding, 

sputterers, thermotransfer printing or thin film production - 

we exploit all possibilities to achieve above-average results. 

And the end result: More than 43 million quality products are 

delivered year in, year out, in more than 100 countries. This 

means some 350 million WIKA measuring instruments in use 

all over the globe. 

DKD accredited calibration 

laboratories for pressure, 

and temperature

With certainty. Worldwide. 

Approvals and Certificates 

High-quality components are essential for safe and reliable 

production processes. They are a precondition for highly-efficient 

processes, helping to avoid danger to people, environment 

and material. 

Rigorous testing of the instruments used, by national and international 

authorised bodies, results in reliability and stable 

processes. WIKA instruments offer a wide range of approvals 

and certification, worldwide. 

Electronic, mechatronic and mechanical measuring instruments 

for pressure and temperature are not only suitable 

for general industrial applications in aggressive and nonaggressive 

ambience, WIKA also offers a wide variety of 

solutions for hazardous areas. 

Comprehensive product range 

This brochure contains the standard versions of our explosionprotected 

pressure and temperature measuring instruments. 

Depending on the application, we offer optimised solutions 

in different types of protection (e.g. Ex ia, Ex ib, Ex nA, Ex nL, 

Ex d, etc.). Further explosion-protected measuring instruments 

can be found at www.wika.de. 

Our Services 

3

Pressure transmitters, level probes 

and process transmitters 

N-10 

Pressure transmitter 

Ex nA 

4 

Ex ia – Intrinsic safety 

Ex d – Flameproof enclosure 

Ex nA – Non-sparking 

Ex nA nL – Self-protected Energy-limited 

Ex nL – Energy-limited 

ATEX mark: II 3 G EEx nA IIC T6 

Non-linearity (± % of span): 0.2 % BFSL 

Measuring ranges: 0 … 0.1 to 0 … 1,000 bar relative 

0 … 0.25 to 0 … 25 bar absolute 

Special features: Low-power version 

Flush diaphragm available 

Data sheet: PE 81.26 

IL-10 

Level probe 

Ex ia 

ATEX mark: II 1 G EEx ia IIA/IIC T4 ... T6 

II 1 D IP65 T80 °C 

I M1 EEx ia I 


Measuring ranges: 0 … 0.1 to 0 … 25 bar relative 

Special features: Hastelloy version 


E-10 


Ex d 

ATEX mark: II 2 G Ex d IIC 




Special features: Low-power version 

suitable for sour gas applications 

(NACE) 



IUT-10 

Universal process transmitter 

Ex ia 

ATEX mark: II 1/2 G EEx ia IIC T4/T5/T6 

II 1/2 D IP6X T 

Accuracy (± % of span): 0.1% of span 

Measuring ranges: 0 ... 0.4 to 0 ... 4000 bar 

-1 ... 0 to -1 ... +15 bar 

0 ... 0.4 to 0 ... 16 bar absolute 

Special features: Freely scaleable measuring ranges 

(turndown to 1 : 20) 

Case made of plastic or aluminium 



IS-20-S / IS-20-F 


Ex ia 

ATEX mark: I/II 1 G/1 D Ex ia I/IIC T6 




Special features: Suitable for SIL 2 

according to IEC 61508/IEC 61511 

High-pressure version available 



IPT-10 

Process pressure transmitter 

Ex ia, Ex d 

ATEX mark: II 1 G, 1/2 G, 2 G Ex ia IIC T6 

II 1/2 D, 2 D IP66/67 T* 

II 1/2 G, 2 G Ex d ia IIC T6 

Accuracy (± % of span): 0.075 to 0.25 % 

Measuring ranges: 0 ... 0.1 to 0 ... 4000 bar 

-1 ... 0 to -1 ... +60 bar 

0 ... 0.1 to 0 ... 60 bar absolute 


(turndown to 1 : 30) 

Case made of plastic, aluminium 

or stainless steel 


Data sheet: PE 86.11

WUC-1X 

Ultra high purity transducer 

Ex nA nL 

ATEX mark: II 3 G Ex nA nL IIC T4/T5/T6 X 

Accuracy (± % of span): 0.5 % (0.25 % BFSL) 

Measuring ranges: -1 … 1 to -1 … 250 bar 

0 … 1 to 0 … 400 bar relative, absolute 

Process connection: Single end 

Flow through 

Modular surface mount 


DPT-10 

Differential pressure transmitter 

Ex ia, Ex d 

ATEX mark: II 1 G, 1/2 G, 2 G Ex ia IIC T6 

II 1/2 G, 2 G Ex d ia IIC T6 

Accuracy (± % of span): 0.075 ... 0.15 % 

Measuring ranges: 0 ... 10 mbar to 0 ... 40 bar 

at max. stat. pressure of 160 or 420 bar 


Case made of plastic, aluminium 

or stainless steel 

Optionally with integrated display 

and instrument mounting bracket for 

wall/pipe mounting 


NWU-1X 

Ultra high purity transducer 

Ex nL, Ex nA 

For information about further explosion-protected application areas, 

please refer to the respective data sheet and to our approvals database at www.wika.de. 

ATEX : II 3 G Ex nL IIC T4 or II 3 G Ex nA IIC T4 

Accuracy (± % of span): 0.5 % (0.25 % BFSL) 

Measuring ranges: -1 … 1 to -1 … 250 bar 

0 … 2 bar to 0 … 400 bar relative, absolute 

Process connection: Single end 

Flow through 

Modular surface mount 


Electronic pressure measuring 

instruments 

GCS-1 

Gas cylinder scale 

Ex nL, Ex nA 

ATEX mark: II 3 G Ex nL IIC T4/T5 X 

Accuracy (± % of span): 0.1% (0.05 % BFSL) 

Measuring ranges: 0 … 60 lbs (27.22 kg), 

0 … 100 lbs (45.36 kg), 

0 … 300 lbs (136.08 kg) 

Special features: Meets highest EMC requirements 


5

Pressure measuring instruments 

with electrical output signal 

PGT23.1x0 

Bourdon tube, 

stainless steel version 

Ex ia 

DPGT43.1x0 

Differential pressure, 


Ex ia 

6 


ATEX mark: II 2 G Ex ia IIC T4 ... T6 bzw. 

I M2 Ex ia I 

Accuracy class: 1.0 

Scale range: 0 ... 0.6 to 0 ... 1600 bar 

Data sheet: PV 12.04 


I M2 Ex ia I 


Scale range: 0 ... 16 mbar to 0 ... 25 bar 


PGT43.1x0 

Diaphragm element, 


Ex ia 


I M2 Ex ia I 




DPGT43HP.1x0 

Differential pressure, stainless 

steel version, highly overpressure 

safe, Ex ia 


I M2 Ex ia I 




PGT43HP.1x0 



Ex ia 


I M2 Ex ia I 



Overpressure safety: to 400 bar 


PGT63HP.1x0 

Capsule element, 


Ex ia 


I M2 Ex ia I 


Scale range: 2.5 ... 100 mbar 

Data sheet: PV 16.06

APGT43.1x0 

Absolute pressure, 


Ex ia 


I M2 Ex ia I 


Scale range: 0 ... 25 mbar to 0 ... 25 bar absolute pressure 


712.15 with 892.44 

Cryo Gauge ® 

Ex ia 




I M2 Ex ia I 

Especially for level measurement in cryogenic technology 

Scale selection switch for multiple scales 

Synchronous span adjustment for mechanical and 

electrical output signal 

Data sheet: PM 07.30 

Mechatronic pressure measuring 


7

Pressure measuring instruments 

with switch contacts 

212.20 with 831 

Bourdon tube, 

industrial series 

Ex c 

8 

Ex c – Constructive safety 

ATEX mark: 212.20: II 2 GD c TX 

831: II 2 G EEx ia IIC T6 




43x.30 with 831 


stainless steel safety version 

Ex c 

ATEX mark: 43x.30: II 2 GD c TX 





23x.50 with 831 

Bourdon tube, 


Ex c 






43x.50 with 831 



Ex c 






23x.30 with 831 

Bourdon tube, 

stainless steel safety version 

Ex c 






432.x6 with 831 

Diaphragm element, stainless 

steel version, highly overpressure 

safe, Ex c 

ATEX mark: 432.x6: II 2 GD c TX 





Data sheet: PV 24.07

632.51 with 831 



Ex c 

ATEX mark: 632.51II 2 GD c TX 



Scale range: 0 ... 2.5 to 0 ... 100 mbar 


73x.51 with 831 



Ex c 









732.14 with 831 


highly overpressure safe 

Ex c 

ATEX mark: 732.14: II 2 GD c TX 





9

Pressure switches 

10 



PCS / PCA 

Compact design 

Ex ia, Ex d 

ATEX mark: 

PCS: II 1 G Ex ia IIC T6/T4 

II 1 D Ex iaD 20 IP65 T85 °C/135 °C 

PCA: II 1/2 GD EEx d IIC T6 IP 65 T85 °C 

II 2 GD EEx d IIC T6 IP 65 T85 °C 

Repeatability: better than 1 % 

Measuring range: -1 … 0.1 to 100 … 600 bar 

Data sheet: SP 08.36, SP 08.31, SP 08.32, SP 08.33 

BWX / BAX 

Bourdon tube 

Ex ia, Ex d 

ATEX mark: 

BWX: II 1 G Ex ia IIC T6/T4 


BAX: II 1/2 G Ex d IIC T6 

II 1/2 G Ex tD A21 IP65 T85 °C 


Measuring range: 0 … 2.5 to 0 … 600 bar 

Data sheet: SP 08.20, SP 08.21, SP 08.22 

MW / MA 

Diaphragm element 

Ex ia, Ex d 

ATEX mark: 

MW1: II 1 G Ex ia IIC T6/T4 


MA: II 1/2 G Ex d IIC T6 

II 1/2 G Ex tD A21 IP65 T85 °C 


Measuring range: -0.2 … 0 to 0 … 40 bar 

Data sheet: PV 31.10, SP 08.11 

MWB / MAB 


low pressure range 

Ex ia, Ex d 

ATEX mark: 

MWB: II 1 G Ex ia IIC T6/T4 


MAB: II 1/2 G Ex d IIC T6 

II 1/2 G Ex tD A21 IP65 T85 °C 


Measuring range: 0 … 16 to 0 … 100 bar 

Data sheet: SP 08.12, SP 08.13

MWH / MAH 

Diaphragm piston system, 

for high pressure ranges 

Ex ia, Ex d 

ATEX mark: 

MWH: II 1 G Ex ia IIC T6/T4 


MAH: II 1/2 G Ex d IIC T6 

II 1/2 G Ex tD A21 IP65 T85 °C 


Measuring range: 4 … 40 to 30 … 600 bar 

Data sheet: SP 08.14, SP 08.15 

DW / DA 

Differential pressure 

Ex ia, Ex d 

ATEX mark: 

DW: II 1 G Ex ia IIC T6/T4 


DA: II 1/2 G Ex d IIC T6 

II 1/2 G Ex tD A21 IP65 T85 °C 


Measuring range: 0 … 160 mbar to 0 … 40 bar 


DW10 / DA10 


low pressure range 

Ex ia, Ex d 

ATEX mark: 

DW10: II 1 G Ex ia IIC T6 

II 1 D Ex iaD 20 IP65 T85 °C 

DA10: II 1/2 G Ex d IIC T6 

II 1/2 D Ex tD A21 IP65 T85 °C 


Measuring range: 0 … 16 to 0 … 60 mbar 


DC / DE 


compact design 

Ex ia, Ex d 

ATEX mark: 

DC: II 1 G Ex ia IIC T6/T4 


DE: II 1/2 G Ex d IIC T6 

II 1/2 G Ex tD A21 IP65 T85 °C 


Measuring range: 0 ... 160 mbar to 0 ... 40 bar 






11

Pressure gauges 

with Bourdon tube 

12 


111.10 

Standard version 

Ex c 

ATEX mark: II 2 GD c TX 



(max. 40 bar with 160 mm) 


113.53 

Standard version with liquid filling 

Ex c 


Accuracy class: NS 40: 2.5 

NS 80, 100: 1.6 

Scale range: 0 ... 1 to 0 ... 400 bar 


111.12 

Standard version, 

back mount connection 

Ex c 




(max. 40 bar with 160 mm) 


213.40 

Forged brass case with liquid 

filling, Ex c 


Accuracy class: NS 63: 1.6 

NS 100: 1.0 



111.16 

Panel mounting series, 

back mount connection 

Ex c 





213.53 

Stainless steel case with liquid 

filling, Ex c 


Accuracy class: NS 50, 63: 1.6 

NS 100: 1.0 

Scale range: NS 50: 0 ... 1 to 0 ... 600 bar 

NS 63, 100: 0 ... 0.6 to 0 ... 1000 bar 

Data sheet: PM 02.12

All pressure gauges on this page can be delivered in 

combination with a flame-arresting gap so they can also 

be mounted to Zone 0 hazardous areas. 

23x.30 

Bourdon tube, 

safety version, stainless steel 

Ex c 



Scale range: 0 ... 1600 bar 


23x.36 

Bourdon tube, 


Ex c 








Mechanical pressure measuring 


23x.50 

Bourdon tube, 


Ex c 





13

Pressure gauges for relative, 

absolute and differential pressure 

All pressure gauges on this page can be delivered in 

combination with a flame-arresting gap so they can also 

be mounted to Zone 0 hazardous areas. 

14 


43x.30 

Diaphragm element 


Ex c 





73x.14 


steel, highly overpressure safe up 

to max. 400 bar, Ex c 






43x.50 



Ex c 




Data sheet: PM 04.03

53x.5x 

Absolute pressure, 

diaphragm element 

Ex c 



Scale range: 0 ... 25 mbar to 0 ... 25 bar absolute pressure 


632.51 



Ex c 





63x.50 



Ex c 





73x.51 


steel, all-metal media chamber 

Ex c 







Mechanical pressure measuring 


15

Resistance thermometers 

16 




TR10 

For industrial applications 

Ex ia, Ex d, Ex nAL 

ATEX mark: II 1 G Ex ia IIC T3 ... T6 Ga 

II 1 D Ex ia IIIC T65/T95/T125°C Da 

II 1/2 GD EEx d IIC TX °C IP65 

II 3 GD EEx nAL IIC TX °C IP65 

Sensor element: Pt100, Pt1000 

Measuring range: -200 ... +600 °C 

Data sheet: e.g. TE 60.03 

TR30 


Ex ia 



II 2D Ex iaD 21 T 

Sensor element: Pt100 


Output: Pt100, 4 ... 20 mA 

Data sheet: TE 60.30 

TR22 

For sanitary applications 

Ex ia, Ex nAL 







TR40 

Cable version 

Ex ia, Ex nAL 







TR25 

In-line version 

Ex ia 






TR50 

Surface version 

Ex ia, Ex nAL 






Data sheet: TE 60.50

TR53 

Bayonet version 

Ex ia, Ex nAL 







TR60-A 

For ambient temperature 

Ex ia, Ex nAL 







TR55 

With spring-loaded measurement 

tip 

Ex ia, Ex nAL 









Electrical temperature measuring 


17

Thermocouples 

18 

Ex ia, ib, ic – Intrinsic safety 




Ex nL – Energy-limited 

TC10 

For industrial applications 

Ex ia, Ex d, Ex nAL 



II 1/2 GD EEx d IIC TX °C IP65 


Sensor element: Type K, N, E, J or T 


Data sheet: e.g. TE 65.03 

TC 53 

Bayonet version 

Ex ia, Ex nAL 







TC40 

Cable version 

Ex ia, Ex nAL 







TC50 

Surface version 

Ex ia, Ex nAL 






Data sheet: TE 65.50

Temperature transmitters 

T12 

4 ... 20 mA, digital 

Ex ia, Ex nL 

ATEX mark: II 1 G EEx ia IIC T6 

II 3 G EEx nL IIC T6 

Accuracy: < 0.25 % 

Input: Pt100, thermocouple 

PC configurable 

Data sheet: TE12.03 

T53 

FOUNDATION Fieldbus, 

PROFIBUS PA 

Ex ia, Ex ic, Ex nA [nL] 

ATEX mark: II 1 G Ex ia IIC T6 

II 1 D Ex iaD 

II 3 GD Ex nA [nL] IIC T6 

II 3 GD Ex ic IIC T6 


Input: Pt100, thermocouple, potentiometer, duplex sensor 



T24 

4 ... 20 mA, analogue 

Ex ia, Ex nL 

ATEX mark: II 1 G EEx ia IIC T6 

II 3 G EEx nL IIC T6 


Input: only Pt100 





Electrical temperature measuring 


T32 

4 ... 20 mA, HART®,digital 

Ex ia, Ex nL 

ATEX mark: II 1G Ex ia IIC T4 ... T6 Ga 

II 1D Ex ia IIIC T120°C Da 

II 3G EEx nL IIC T6 


Input: Pt100, thermocouple, potentiometer, duplex sensor 



19

Mechatronic temperature measuring 


Dial indicating thermometers 

with switch contacts 

20 




55 with 831 

Bimetal 

Ex c 

ATEX mark: 55: II 2 GD c TX 


Nominal size: 100, 160 

Wetted parts: stainless steel 1.4571 

Option: liquid damping up to max. 250 °C (sensor) 

Data sheet: TV 25.01 

TXS / TXA 

Mini version 

Ex ia, Ex d 

ATEX mark: 

TXS: II 1 G Ex ia IIC T6/T4 


TXA: II 1/2 G Ex d IIC T6 

II 1/2 G Ex tD A21 IP66 T85 °C 


Measuring ranges: -15 ... +210 to +180 ... 250 °C 


73 with 831 

Gas actuated 

Ex c 





Option: capillary 

liquid damping (case) 


Temperature switches 

TCS / TCA 


Ex ia, Ex d 

ATEX mark: 

TCS: II 1 G Ex ia IIC T6/T4 


TCA: II 1/2 GD EEx d IIC T6 IP 65 T85 °C 

II 2 GD EEx d IIC T6 IP 65 T85 °C 


Measuring range: -30 … +10 °C to 160 ... 250 °C 


74 with 831 

Gas actuated, 

for sanitary applications 

Ex c 



Nominal size: 100 


Option: surface of wetted parts 

electropolished 



TWG / TAG 

Heavy-duty version 

Ex ia, Ex d 

ATEX mark: 

TWG: II 1 G Ex ia IIC T6/T4 


TAG: II 1/2 G Ex d IIC T6 

II 1/2 G Ex tD A21 IP65 T85 °C 


Measuring range: -30 … +70 °C to 0 ... 600 °C 

Data sheet: SP 08.60, SP 08.61

Dial indicating thermometers 

53 / 54 

Bimetal 

Ex c 


Nominal size: 53: 3", 5" 

54: 63, 80, 100, 160 



Data sheet: TM 53.01, TM 5401 

74 

Gas actuated, for food, bio and 

pharmaceutical industries 

Ex c 


Nominal size: 100 


Option: surface of wetted parts 

electropolished 


Data sheet: TM 74.01 

55 

Bimetal, 

Case rotating and swivelling 

Ex c 


Nominal size: 63, 100, 160 






Mechanical temperature measuring 


73 

Gas actuated, 


Ex c 




Option: capillary 



21

Calibration technology 

Calibration technology 

for pressure and temperature 

22 




CPH6200-Ex 

Hand-Held pressure indicator 

Ex ib 

ATEX mark: II 2 G EEx ib IIC T4 

Accuracy: 0.2 % 

Measuring ranges: 0 … 0.1 to 0 … 1000 bar 

Integrated data logger 

Data sheet: CT 11.02 

CTH65I0 

Hand-Held thermometer 

Ex ib 

ATEX mark: II 2 G EEx ib IIB T4 

Accuracy: 50 … 800 mK 

Measuring ranges: -200 … 800 °C 

Sensor types: Pt100 

Data sheet: CT 55.10 

CPG1000 

Precision digital pressure gauge 

Ex nA 

ATEX mark: II 3 G Ex nA IIB T6 

Accuracy: 0.05 % 

Measuring ranges: 0 … 0.07 to 0 ... 700 bar 

Integrated data logger, 

robust stainless steel case, IP 65 

Data sheet: CT 10.01

Accessories 

DIH50-F / DIH52-F 

HART ® current loop display 

Ex ia, Ex d 

ATEX mark: II (1) 2 G Ex ia IIC T4 … T6 (Ga) Gb 

II (1) 2 D Ex ia IIIC T120 °C (Da) Db 

Accuracy (± % of span): 0.1 % ± 1 digit 

Display: measured value (5-digit), bargraph (20 segments) 

unit and info line (6-digit) 

Special features: automatic adjustment of display 

range and unit via HART ® 

communication, 

Model DIH52-F suitable for multidrop 

operation and with local master function 

Data sheet: AC 80.10, AC 80.11 

NWUR-1 

Ultra high purity 

LED attachable indicator for 

transmitters, Ex nA 

ATEX mark: II 3 G EEx nA IIC T6 X 

Accuracy (± % of span): (0.25 % BFSL) ± 1 digit 

Scale range: -999 …6000 

0 … 2 to 0 … 400 bar relative, absolute 

Input and output signal: 4…20 mA 

2xNPN Open Collector 

(potential-free) 


DIH62-F 

HART ® current loop display 

Ex ia 

Control unit for inductive switch 

contacts 

[Ex ia] 

ATEX mark: II (1) GD [EEx ia] IIC 

For 1 or 2 contacts 

Rated voltage: 230 V AC or 20 ... 35 V DC 

Also available in safety version 

Data sheet: AC 08.01 



ATEX mark: II (1) 2 G Ex ia IIC T4 … T6 (Ga) Gb 

II (1) 2 D Ex ia IIIC T120 °C (Da) Db 

Accuracy (± % of span): 0.1 % ± 1 digit 

Display: measured value (5-digit), bargraph (20 segments) 

unit and info line (6-digit) 

Special features: automatic adjustment of display 

range and unit via HART ® 

communication 

Suitable for multidrop operation 

Local master function 


A-IAI-1 

Accessories 

LCD attachable indicator for 

transmitters 

Ex ib 

ATEX mark: II 2 G EEx ib IIC T4 

Accuracy: (± % of span): 0.2 % ± 1 digit 

Indication range: -1999 ... 9999 

Input signal: 4 … 20 mA 


Transmitter supply isolator 

[Ex ia], Ex nA 

ATEX mark: II (1) GD [Ex ia] IIC 

II 3G Ex nA II T4 

Input/output signal: 0/4 … 20 mA 

HART ® 

Rated voltage: DC 20 ... 35 V DC 

23

Combination possibilities pressure 

for measuring instruments with 

diaphragm seals 

The diaphragm seal can be mounted to the measuring instruments either by direct mounting or via a capillary, as desired. 

Rigid mounting is made by a direct threaded connection or welding the measuring instrument into the diaphragm seal or via an 

adapter. At high temperatures, a cooling element can be connected in-between. 

24 

Pressure measuring 


Diaphragm seals 

Pressure transmitters 

Process transmitters 

Direct mounting Cooling element 

Capillary 

Diaphragm in-line seals 

Pressure switches

Combination possibilities 

for temperature measuring 

instruments with thermowells 

Whether in aggressive or abrasive process media, whether in 

high- or low-temperature ranges: For electrical or mechanical 

thermometers, to prevent direct exposure of their temperature 

sensors to the medium, thermowells that suit each application 

are available. 

Thermowells can be machined from solid barstock or assembled 

from tube sections and can either be screw-, weld- 

or flange-fitted. They are offered in standard and special 

materials such as stainless steel 1.4571, 316/316L, hastelloy 

or titanium. Each version, depending on its construction type 

and its mounting to the process, has certain advantages 

and drawbacks with respect to its load limits and the special 

materials that can be used. 

In order to manufacture thermowells for flange mounting at low 

Bimetal thermometers 

Process connections per EN 60079-26 

For welding 

Gas actuated thermometers 


For screw-fitting 

Resistance 

thermometers 


Technical Information 

cost from special materials, the designs used differ from 

standard thermowells in accordance with DIN 43772. Thus, 

only the wetted parts of the thermowell are manufactured 

from special materials, whereas the non-wetted flange is 

made of stainless steel and is welded to the special material. 

This design is used both for fabricated and solid-machined 

thermowells. With the special material, tantalum, a removable 

jacket is used, which is slid over the supporting thermowell 

from stainless steel. 

For the separation of ex-zones in accordance with ATEX, 

thermowells can be used in combination with the process 

connections per EN 60079-26 shown below. 

Thermocouples 


For 

flange mounting 

25

Explosion protection worldwide 

26 

Conditions in the hazardous area 

Material 

Groups 

Gases, 

vapours 

Dust 

Methane, 

dust 

Fibres / 

flyings 

Ignition protection types (examples) 

Ignition protection 

type 

Flameproof 

enclosure 

Temporary behaviour of the flammable material 

in the hazardous area 

Are present continuously, for long periods or frequently 

Marking 

Definition IEC ATEX approval FM / UL 

Ex d Propagation of an explosion to the outside is prevented. IEC 60079-1 EN 60079-1 

Intrinsic safety Ex i Limitation of the energy of sparks and temperatures IEC 60079-11 EN 60079-11 

n Ex n Different protection principles only for Zone II/Div. 2 IEC 60079-15 EN 60079-15 

Temperature classes and max. surface temperatures 

Class T1 T2 

T2A, T2B, 

T2C, T2D 

T3 

T3A,T3B, 

T3C 

FM 3615 

UL 1203 

FM 3610 

UL 913 

FM 3611 

ANSI/ISA 12.12.01 

T4 T4A T5 T6 

IEC/ATEX/NEC 505 450 °C 300 °C -- 200 °C -- 135 °C -- 100 °C 85 °C 

NEC 500/CEC 450 °C 300 °C 

280 °C 

260 °C 

230 °C 

215 °C 

Classification of hazardous areas 

IEC EPL* 

200 °C 

180 °C 

165 °C 

160 °C 

EU Directive 94/9/EC (ATEX) 

Zone Group Category 

Zone 0 Ga Zone 0 II 1 G 

Occur occasionally Zone 1 Gb Zone 1 II 2 G 

Probably do not occur at all, but if they do, only rarely 

or for short periods 

Are present continuously, for long periods or 

frequently 

Zone 2 Gc Zone 2 II 3 G 

US NEC 500 

Canada CEC 

Class I 

Division 1 

Class I 

Division 2 

Zone 20 Da Zone 20 II 1 D Class II 

Division 1 

Occur occasionally Zone 21 Db Zone 21 II 2 D -- 

Probably do not occur at all, due to suspended dust, 

but if they do, only rarely or for short periods 

Zone 22 Dc Zone 22 II 3 D 

Class II 

Division 2 

Hazardous areas -- Ma -- I M1 -- -- 

Potentially hazardous areas -- Mb -- I M2 -- -- 

*) Equipment Protection Level per IEC 2007 and CENELEC 2009 

-- -- -- -- Class III -- 

US NEC 

505 

Class I 

Zone 0 

Class I 

Zone 1 

Class I 

Zone 2 

135 °C 120 °C 100 °C 85 °C 

-- 

--

IEC Ex ia IIC T6 

EC directive II 1G Ex ia IIC T6 

NEC 500 Intrinsic safety Class I Division 1 Group ABCD T6 

NEC 505 Class I Zone 0 AEx ia IIC T6 

Groups 

IEC/ATEX/NEC 505 NEC 500 /CEC 

Gas groups 

Group I 

I Methane - -* 

Group II Class I 

IIA Propane Propane Class I, Group D 

IIB Ethylene Ethylene Class I, Group C 

IIB + H2 Ethylene + hydrogen Acetylene Class I, Group B 

IIC Acetylene 

Hydrogen 

Hydrogen Class I, Group A 

Dust groups 

Group III** Class II/Class III 

IIIA Combustible flyings Fibres, flyings Class III 

IIIB Non-conducting dust Non-carbon-containing dust Class II, Group G 

IIIC Conducting dust Carbon-containing dust Class II, Group F 

* Are not within the scope of NEC or CEC 

** per IEC 2007 and CENELEC 2009 

Metal dust Class II, Group E 

Technical Information 

ANZEx 

27

WIKA worldwide 

Europe 

Austria 

WIKA Messgerätevertrieb 

Ursula Wiegand 

GmbH & Co. KG 

1230 Vienna 

Tel. (+43) 1 86916-31 

Fax: (+43) 1 86916-34 

E-Mail: info@wika.at 

www.wika.at 

Benelux 

WIKA Benelux 

6101 WX Echt 

Tel. (+31) 475 535-500 

Fax: (+31) 475 535-446 

E-Mail: info@wika.nl 

www.wika.nl 

Bulgaria 

WIKA Bulgaria EOOD 

Bul. „Al. Stamboliiski“ 205 

1309 Sofia 

Tel. (+359) 2 82138-10 

Fax: (+359) 2 82138-13 

E-Mail: t.antonov@wika.bg 

Croatia 

WIKA Croatia d.o.o. 

Hrastovicka 19 

10250 Zagreb-Lucko 

Tel. (+385) 1 6531034 

Fax: (+385) 1 6531357 

E-Mail: info@wika.hr 

www.wika.hr 

Finland 

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00210 Helsinki 

Tel. (+358) 9-682 49 20 

Fax: (+358) 9-682 49 270 

E-Mail: info@wika.fi 

www.wika.fi 

France 

WIKA Instruments s.a.r.l. 

95610 Eragny-sur-Oise 

Tel. (+33) 1 343084-84 

Fax: (+33) 1 343084-94 

E-Mail: info@wika.fr 

www.wika.fr 

Germany 

WIKA Alexander Wiegand 

SE & Co. KG 

63911 Klingenberg 

Tel. (+49) 9372 132-0 

Fax: (+49) 9372 132-406 

E-Mail: info@wika.de 

www.wika.de 

Italy 

WIKA Italia Srl & C. sas 

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Tel. (+39) 02 9386-11 

Fax: (+39) 02 9386-174 

E-Mail: info@wika.it 

www.wika.it 

Poland 

WIKA Polska S.A. 

87-800 Wloclawek 

Tel. (+48) 542 3011-00 

Fax: (+48) 542 3011-01 

E-Mail: info@wikapolska.pl 

www.wikapolska.pl 

WIKA Alexander Wiegand SE & Co. KG 

Alexander-Wiegand-Straße 30 • 63911 Klingenberg/Germany 

Tel. (+49) 9372/132-0 • Fax (+49) 9372/132-406 

E-Mail info@wika.de • www.wika.de 

13347391 04/2010 GB 

Romania 

WIKA Instruments Romania S.R.L. 

Bucuresti, Sector 5 

Calea Rahovei Nr. 266-268 

Corp 61, Etaj 1 

Tel. (+40) 21 4048327 

Fax: (+40) 21 4563137 

E-Mail: m.anghel@wika.ro 

Russia 

ZAO WIKA MERA 

127015 Moscow 

Tel. (+7) 495-648 01 80 

Fax: (+7) 495-648 01 81 

E-Mail: info@wika.ru 

www.wika.ru 

Serbia 

WIKA Merna Tehnika d.o.o. 

Sime Solaje 15 

11060 Belgrade 

Tel. (+381) 11 2763722 

Fax: (+381) 11 753674 

E-Mail: info@wika.co.yu 

www.wika.co.yu 

Spain 

Instrumentos WIKA, S.A. 

C/Josep Carner, 11-17 

08205 Sabadell (Barcelona) 

Tel. (+34) 902 902577 

Fax: (+34) 933 938666 

E-Mail: info@wika.es 

www.wika.es 

Switzerland 

Manometer AG 

6285 Hitzkirch 

Tel. (+41) 41 91972-72 

Fax: (+41) 41 91972-73 

E-Mail: info@manometer.ch 

www.manometer.ch 

Turkey 

WIKA Instruments Istanbul 

Basinc ve Sicaklik Ölcme 

Cihazlari 

Ith. Ihr. ve Tic. Ltd. Sti. 

Bayraktar Bulvari No. 21 

34775 Yukari Dudullu - Istanbul 

Tel. (+90) 216 41590-66 

Fax: (+90) 216 41590-97 

E-Mail: info@wika.com.tr 

www.wika.com.tr 

Ukraine 

WIKA Pribor GmbH 

83016 Donetsk 

Tel. (+38) 062 34534-16 

Fax: (+38) 062 34534-17 

E-Mail: info@wika.ua 

www.wika.ua 

United Kingdom 

WIKA Instruments Ltd 

Merstham, Redhill RH13LG 

Tel. (+44) 1737 644-008 

Fax: (+44) 1737 644-403 

E-Mail: info@wika.co.uk 

www.wika.co.uk 

North America 

Canada 

WIKA Instruments Ltd. 

Head Office 

Edmonton, Alberta, T6N 1C8 

Tel. (+1) 780 46370-35 

Fax: (+1) 780 46200-17 

E-Mail: info@wika.ca 

www.wika.ca 

Mexico 

Instrumentos WIKA Mexico S.A. 

de C.V. 

01210 Mexico D.F. 

Tel. (+52) 55 55466329 

E-Mail: ventas@wika.com 

www.wika.com.mx 

USA 

WIKA Instrument Corporation 

Lawrenceville, GA 30043 

Tel. (+1) 770 5138200 

Fax: (+1) 770 3385118 

E-Mail: info@wika.com 

www.wika.com 

WIKA Instrument Corporation 

Electrical Temperature Division 

950 Hall Court 

Deer Park, TX 77536 

Tel. (+1) 713 47500-22 

Fax (+1) 713 47500-11 

E-Mail: info@wikaetemp.com 

www.wika.com 

Mensor Corporation 

201 Barnes Drive 

San Marcos, TX 78666 

Tel. (+1) 512 3964200-15 

Fax (+1) 512 3961820 

E-Mail: sales@mensor.com 

www.mensor.com 

South America 

Argentina 

WIKA Argentina S.A. 

Buenos Aires 

Tel. (+54) 11 47301800 

Fax: (+54) 11 47610050 

E-Mail: info@wika.com.ar 

www.wika.com.ar 

Brazil 

WIKA do Brasil Ind. e Com. Ltda. 

CEP 18560-000 Iperó - SP 

Tel. (+55) 15 34599700 

Fax: (+55) 15 32661650 

E-Mail: marketing@wika.com.br 

www.wika.com.br 

Asia 

China 

WIKA International Trading 

(Shanghai) Co., Ltd. 

200001 Shanghai 

Tel. (+86) 21 538525-72 

Fax: (+86) 21 538525-75 

E-Mail: info@wika.com.cn 

www. wika.com.cn 

India 

WIKA Instruments India Pvt. Ltd. 

Village Kesnand, Wagholi 

Pune - 412 207 

Tel. (+91) 20 66293-200 

Fax: (+91) 20 66293-325 

E-Mail: sales@wika.co.in 

www.wika.co.in 

Japan 

WIKA Japan K. K. 

Tokyo 105-0023 

Tel. (+81) 3 543966-73 

Fax: (+81) 3 543966-74 

E-Mail: t-shimane@wika.co.jp 

Kazakhstan 

TOO WIKA Kazakhstan 

050050 Almaty 

Tel. (+7) 32 72330848 

Fax: (+7) 32 72789905 

E-Mail: info@wika.kz 

www.wika.kz 

Korea 

WIKA Korea Ltd. 

#569-21 Gasan-dong 

Seoul 153-771 Korea 

Tel. (+82) 2 869 05 05 

Fax (+82) 2 869 05 25 

E-Mail: info@wika.co.kr 

www.wika.co.kr 

Malaysia 

WIKA Instrumentation (M) Sdn. 

Bhd. 

47100 Puchong, Selangor 

Tel. (+60) 3 80 63 10 80 

Fax: (+60) 3 80 63 10 70 

E-Mail: info@wika.com.my 

www.wika.com.my 

Singapore 

WIKA Instrumentation Pte. Ltd. 

569625 Singapore 

Tel. (+65) 68 44 55 06 

Fax: (+65) 68 44 55 07 

E-Mail: info@wika.com.sg 

www.wika.com.sg 

Taiwan 

WIKA Instrumentation Taiwan 

Ltd. 

Pinjen, Taoyuan 

Tel. (+886) 3 420 6052 

Fax: (+886) 3 490 0080 

E-Mail: info@wika.com.tw 

www.wika.com.tw 

Africa / Middle East 

Egypt 

WIKA Near East Ltd. 

El-Serag City Towers 

-Tower#2 - Office#67- 

Nasr City Cairo 

Tel. (+20) 2 22733140 

Fax: (+20) 2 22703815 

E-Mail: wika.repcairo@wika.de 

www.wika.com.eg 

Namibia 

WIKA Instruments Namibia 

(Pty) Ltd. 

P.O. Box 31263 

Pionierspark 

Windhoek 

Tel. (+26) 4 6123 8811 

Fax (+26) 4 6123 3403 

E-Mail: info@wika.com.na 

www.wika.com.na 

South Africa 

WIKA Instruments (Pty.) Ltd. 

Gardenview, 

Johannesburg 2047 

Tel. (+27) 11 62100-00 

Fax: (+27) 11 62100-59 

E-Mail: sales@wika.co.za 

www.wika.co.za 

United Arab Emirates 

WIKA Middle East FZE 

Jebel Ali, Dubai 

Tel. (+971) 4 8839-090 

Fax: (+971) 4 8839-198 

E-Mail: wikame@emirates.net.ae 

Australia 

Australia 

WIKA Australia Pty. Ltd. 

Rydalmere, NSW 2116 

Tel. (+61) 2 88455222 

Fax: (+61) 2 96844767 

E-Mail: sales@wika.com.au 

www.wika.com.au 

New Zealand 

Process Instruments Limited 

Unit 7 / 49 Sainsbury Road 

St Lukes - Auckland 1025 

Tel. (+64) 9 8479020 

Fax: (+64) 9 8465964 

E-Mail: info@wika.co.nz 

www.wika.co.nz

Pressure and temperature measuring instruments for hazardous areas

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