MESSKO® BETECH®

Thermometer with bellow-type technology

MESSKO® BETECH® thermometers measure the oil and winding temperature (thermal image) in power transformers. The thermometers consist of a temperature sensor that is connected by a capillary tube to the bellows for the measurement display and another expansion bellows for the compensation of the ambient temperature. The bellow-type technology is characterized by a maintenance-free, rugged and low-interruption measurement principle which impresses with its reliability and durability.

Your Advantages at a Glance

  1. Expansion bellows technology

  2. High switching loads

  3. No readjustment or recalibration over the entire service life

  4. Contacts independently adjustable

  5. Compensation for ambient temperature

  6. Inspection glass made of composite safety glass with integrated UV filter

  7. Extremely durable and reliable

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Product Information

Housing Die-cast aluminum, powder-coated, RAL 7033 (RAL 7038 optional)
Viewing glass Laminated safety glass (standard) (optional: UV-stabilized polycarbonate)
Sensor screw joint Square flange 4–holes; G3/4"; G1"; 7/8"-14UNF;
other thread joints on request
Cable gland Up to 3 x M20 and 1 x M16
Measuring range 0 - 150° C or -20 - 130° C or 0 - 160° C or -40 - 160° C;
other ranges on request
Display accuracy ± 3° C (30 - 150 °C) (optional: ± 2 °C or ± 1.5 °C)
Installation Indoors and outdoors, tropic-proof
Ambient temperature -40 - 70 °C (optional: polar version down to -60 °C)
Insulation voltage 2.5 kV 50 Hz 1 min
Degree of protection IP 55 in accordance with EN60529 (optional: IP 65)
Analog output 4-20 mA; 4-20 mA and 5 V DC; 0-5 V DC; Pt100
Weight Approx. 4 kg
Micro-switches
Number 2, 3, 4 or 5
Contact load Standard SPDT 250 V AC / 15 A; (optionally: MBO, DPDT or gold plated SPDT)
Switch hysteresis 12 ± 2 °C; others on request
Technical Data
Housing Die-cast aluminum, powder-coated, RAL 7033 (RAL 7038 optional)
Viewing glass Laminated safety glass (standard) (optional: UV-stabilized polycarbonate)
Sensor screw joint Square flange 4–holes; G3/4"; G1"; 7/8"-14UNF;
other thread joints on request
Cable gland Up to 3 x M20 and 1 x M16
Measuring range 0 - 150° C or -20 - 130° C or 0 - 160° C or -40 - 160° C;
other ranges on request
Display accuracy ± 3° C (30 - 150 °C) (optional: ± 2 °C or ± 1.5 °C)
Installation Indoors and outdoors, tropic-proof
Ambient temperature -40 - 70 °C (optional: polar version down to -60 °C)
Insulation voltage 2.5 kV 50 Hz 1 min
Degree of protection IP 55 in accordance with EN60529 (optional: IP 65)
Analog output 4-20 mA; 4-20 mA and 5 V DC; 0-5 V DC; Pt100
Weight Approx. 4 kg
Micro-switches
Number 2, 3, 4 or 5
Contact load Standard SPDT 250 V AC / 15 A; (optionally: MBO, DPDT or gold plated SPDT)
Switch hysteresis 12 ± 2 °C; others on request

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Phone +1 731 4206049
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