MESSKO® MMK

Magnetic oil level indicators for transformers

The MESSKO® MMK magnetic oil level indicator shows the fill level, without needing a float located in the container. The magnetic level gauge can be easily attached to existing flange connections (retrofit) in accordance with DIN 42552. A measuring tube is flanged to the container as a replicate container. Inside, there is a cylindrical float with installed permanent magnet. The indicator rail with the magnetic flaps is on the outside of the measuring tube. Depending on the fill level, the float magnet ensures that the magnetic flaps in the indicator rail turn 180°.

Your Advantages at a Glance

  1. Independent functioning without external power

  2. Permanently weatherproof indicator rail

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Product Information

Operating temperature -40...+70 °C
Ambient air temperature -40...+70 °C
Corrosion protection class C4H and CX (Offshore)
Degree of protection IP55 in accordance with EN60529 (optional: IP65)
Cable gland Up to 3 x M20 and 1 x M16; ½” NPT; Pg16 adapter; M20 x 1.5 WADI (offshore), others on request
Output 4... 20 mA; 4-20 mA; 4-20 mA and 5 VDC; 0-5 V DC; Pt100; Modbus RTU RS485
Switches 2, 3, 4, 5 or 6
Measurement range 0...+150 °C or -20...+130 °C or 0...+160 °C or -40...+160 °C; other ranges on request
Accuracy ± 3 °C (+30...150 °C) (optional: ± 2 °C or ± 1.5 °C); according to IEC 60076-22-01:2019
Sensor gland Square flange 4–holes; G3/4"; G1"; 7/8"-14UNF; other thread joints on request
Operating temperature -40...+70 °C
Ambient air temperature -40...+70 °C
Corrosion protection class C4H and CX (Offshore)
Degree of protection IP55 in accordance with EN60529 (optional: IP65)
Cable gland Up to 3 x M20 and 1 x M16; ½” NPT; Pg16 adapter; M20 x 1.5 WADI (offshore), others on request
Output 4... 20 mA; 4-20 mA; 4-20 mA and 5 VDC; 0-5 V DC; Pt100; Modbus RTU RS485
Switches 2, 3, 4, 5 or 6
Measurement range 0...+150 °C or -20...+130 °C or 0...+160 °C or -40...+160 °C; other ranges on request
Accuracy ± 3 °C (+30...150 °C) (optional: ± 2 °C or ± 1.5 °C); according to IEC 60076-22-01:2019
Sensor gland Square flange 4–holes; G3/4"; G1"; 7/8"-14UNF; other thread joints on request

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