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<strong>NIVOMAG</strong><br />
M A G N E T I C L E V E L S W I T C H E S<br />
O UR P ROFESSION IS Y OUR L EVEL
N I V O M A G �<br />
GENERAL<br />
<strong>NIVOMAG</strong> MK-200 series magnetic float level switches are used for point level detection of liquids in all types of vessels. Operation<br />
without external power, side or top mounting, wide temperature and pressure ranges, various process connections, stainless steel<br />
wetted parts and Ex versions make it a universally applicable level switch.<br />
MODEL SELECTION<br />
To assist in the selection of the correct model the following tables<br />
and diagrams are provided. When selecting a model due<br />
consideration must be given to fixed or adjustable hysteresis,<br />
liquid density, mounting position and process connection.<br />
ARM LENGTH (mm)<br />
FLOAT Ø (mm)<br />
52<br />
64<br />
120<br />
MODELS<br />
FIXED SWITCH DIFFERENTIAL<br />
MINIMUM LIQUID DENSITY (kg/dm 3)<br />
0 – 100 200 300 1000 – 3000<br />
0.7<br />
0.7<br />
–<br />
0.8<br />
0.8<br />
–<br />
0.85<br />
0.8<br />
–<br />
–<br />
–<br />
0.7<br />
Side mounted<br />
MKA–210<br />
Threaded process connection<br />
MKA–21B<br />
MKA–21N<br />
TYPE<br />
FEATURES<br />
Fixed differential<br />
Adjustable differential<br />
Straight arm<br />
L or Z arm<br />
Side mounted<br />
Top mounted<br />
Submersible<br />
Rubber protection sleeve<br />
Flanged process connection<br />
Threaded process connection<br />
Ex version<br />
Tester<br />
MK- 21 MK- 22 MK- 23<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
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Rubber protection sleeve<br />
MKG–210<br />
MKS–210<br />
Flanged process<br />
connection<br />
MKA–211
N I V O M A G �<br />
ADJUSTABLE SWITCH DIFFERENTIAL<br />
Switch differential between high and low switch point<br />
can be changed by changing positions of the two<br />
pins.<br />
SWITCHING DATA<br />
Submersible<br />
MKU–210<br />
0.2 MPa 2.5 MPa<br />
Side mounted, Z arm<br />
MKA–210–4Z<br />
TYPE: MK–22<br />
-0 -1 -2 -3<br />
FEATURES<br />
-9 -5 -6 -7<br />
Lk= arm length<br />
0 100 200 300<br />
L= protrusion length 254 373 473 573<br />
X1= min. high switch point 25 52 73 94<br />
X2= min. low switch point 25 48 61 68<br />
X3= max. high switch point 110 190 250 310<br />
X4= max. low switch point<br />
Note: values for water at 20°C<br />
90 170 250 305<br />
TYPE: MK–21<br />
FEATURES<br />
Lk= arm length<br />
L= protrusion length<br />
Lm= max. shifting<br />
X1= high switch point<br />
X2= low switch point<br />
Note: values for water at 20°C<br />
*Only one of the values can be specified<br />
Lsh = high switch point<br />
Lsl = low switch point<br />
SWITCHING DATA<br />
-0<br />
-9<br />
0<br />
202<br />
118<br />
7<br />
16<br />
-1<br />
-5<br />
100<br />
321<br />
180<br />
27<br />
30<br />
-2<br />
-6<br />
200<br />
421<br />
234<br />
45<br />
47<br />
-3<br />
-7<br />
300<br />
521<br />
286<br />
81<br />
43<br />
Top mounted, L arm<br />
MKA-210-4L<br />
Side mounted with adjustable switch differential<br />
MKA–220
N I V O M A G<br />
ELECTRICAL CONNECTION<br />
ACCESSORIES<br />
Tester<br />
MMK<br />
Switch differential can be adjusted<br />
by moving the rings on the rod.<br />
Weight of different rod lengths is compensated<br />
for by adjusting the counter<br />
weight.<br />
Normal units Ex units Underwater version<br />
Counter flange<br />
MFF<br />
Top mounted with adjustable switch differential<br />
MKA–230<br />
Black<br />
Counter flange for tester<br />
MFF<br />
Tester is mounted between the unit and<br />
counter weight. Operation of the unit can<br />
be checked via tester without dismantling<br />
or filling/emptying procedures.<br />
Borown<br />
Connection flange<br />
Green–Yellow<br />
Blue<br />
Black<br />
Cable specification: NSSHöu-J 5x1,5mm 2<br />
Cable diameter:15 mm
N I V O M A G
mk20s02a0607b<br />
TECHNICAL DATA<br />
TYPE<br />
FEATURES<br />
Material of wetted parts<br />
Electrical connection<br />
1x Pg 16 cable 5x2.5 mm2 wire cross section (MKU: integrated cable) �<br />
min 0.7 – 0.85 kg/dm<br />
See figures<br />
Stainless steel<br />
Paint coated aluminium<br />
Switch action<br />
250V AC12 10A; 220V DC13 0.6A (IEC 947-5-1)<br />
3 Nominal pressure max. 2.5 MPa (25 bar) [MKU: 0.2/2.5 MPa (2 bar/25 bar)]<br />
1.6 MPa (16 bar)<br />
Liquid temperature<br />
MKA: -20°C ... +250°C<br />
[MKU: -20°C ... +250°C]<br />
0°C...+100°C 0°C...+200°C -20°C...+250°C<br />
Ambient temperature<br />
-20°C...+80°C<br />
Liquid density<br />
see figures<br />
Switch differential<br />
Fixed Adjustable<br />
Fixed Fixed Adjustable, min. 18 mm<br />
Protrusion length<br />
Housing material<br />
1 micro-switch with 1 closing and 1 opening contact (NO and NC)<br />
Switch rating<br />
Standard<br />
Ex version<br />
250V AC12 2.5A; 220V DC13 0.3A (IEC 947-5-1)<br />
Mechanical protection<br />
Ex protection mark<br />
Certificates<br />
Weight (approx)<br />
� Please specify cable length when order<br />
ORDER CODE<br />
TYPE CODE<br />
Standard A<br />
Standard<br />
+rubber sleeve<br />
Standard<br />
+silicon rubber sleeve<br />
Submersible<br />
Submersible<br />
+rubber sleeve<br />
Submersible<br />
+silicon rubber sleeve<br />
COUNTER FLANGE<br />
MATERIAL CODE<br />
Mild steel 1<br />
Stainless steel<br />
2<br />
FLANGE SIZE CODE<br />
G<br />
92 flange PN25 0<br />
92 PN25 for Tester 1<br />
S<br />
U<br />
V<br />
Z<br />
<strong>NIVOMAG</strong> MFF - 1<br />
MKA-21<br />
MKU-21<br />
NIVELCO PROCESS CONTROL CO.<br />
H-1043 BUDAPEST, DUGONICS U. 11.<br />
TEL.: (36-1) 369-7575 � FAX: (36-1) 369-8585<br />
E-mail: sales@nivelco.com http://www.nivelco.com<br />
<strong>NIVOMAG</strong> MK – 2 –<br />
SWITCH<br />
DIFFERENTIAL<br />
CODE<br />
Fixed 1<br />
Adjustable<br />
2<br />
Adjustable,<br />
vertical float<br />
3<br />
CONNECTION<br />
FLANGE<br />
CODE<br />
92 flange PN 25 0<br />
DN 80 PN 40 mild steel<br />
DN 100 PN 40 mild steel<br />
DN 125 PN 40 mild steel<br />
DN 150 PN 40 mild steel<br />
DN 80 PN 40 st. steel<br />
DN 100 PN 40 st. steel<br />
DN 125 PN 40 st. steel<br />
DN 150 PN 40 st. steel<br />
2” BSP<br />
2” NPT<br />
TESTER<br />
SIDE MOUNTING TOP MOUNTING<br />
MKA-22 MKG-21 MKS-21 MKA-23<br />
1<br />
2<br />
MATERIAL CODE<br />
Mild steel 1<br />
Stainless steel<br />
2<br />
IP 65 (MKU: IP 68 up to 20 m water gauge)<br />
EEx dme IIC T4 ... T6<br />
Cenelec, Germanischer Lloyd<br />
1.8 – 3.5 kg<br />
3<br />
4<br />
5<br />
6<br />
7<br />
8<br />
B<br />
N<br />
<strong>NIVOMAG</strong> MMK - 1 0<br />
ARM LENGTH CODE<br />
Normal version<br />
EX version<br />
0 mm<br />
100 mm<br />
200 mm<br />
300 mm<br />
Z, or L arm<br />
0 mm<br />
100 mm<br />
200 mm<br />
300 mm<br />
Z, or L arm<br />
MK–23<br />
PROTRUSION<br />
LENGTH<br />
Normal<br />
version<br />
EX<br />
version<br />
1265 mm<br />
2265 mm<br />
3265 mm<br />
1265 mm<br />
2265 mm<br />
3265 mm<br />
0<br />
1<br />
2<br />
3<br />
4<br />
9<br />
5<br />
6<br />
7<br />
8<br />
CODE<br />
1<br />
2<br />
3<br />
5<br />
6<br />
7<br />
Technical specifications may be changed without notice
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