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Variohm EuroSensor introduces temperature sensor for railway applications

Variohm EuroSensor introduces temperature sensor for railway applications

Variohm EuroSensor has launched a new variant of its well-proven ETP21 series temperature sensor that fulfils the demanding specifications required by the railway industry. The ETP21R builds upon the pedigree of Variohm’s EPT21 sensors that have gained a solid reputation for value, long life and high performance across many industries including autosports, heavy engineering and hydrogen production.

Based on the well proven PT100 measurement element and with 17-4PH stainless steel wetted components, the EPT21R has been tested for compliance with EN 61373 standards for shock and vibration as well as electromagnetic compatibility to EN 50121-3-2 and salt mist test according to EN ISO 9227-NSS. With a measurement range of -40 to +125 °C and a maximum static operating pressure up to 160 bar, the sensor has a 4 ... 20 mA output and a total error of ±2.0% FSO over a temperature range of -20°C to +85°C.

The ETP21R features a robust 22 mm diameter stainless-steel housing with sealing to IP6X9K (EN 606029), a G1/4A-E pressure connection and an M12x1 round electrical connector for straightforward installation for railway rolling stock and apparatus applications. In addition to shock and vibration ratings of 1000 g/11 msec. and 16 g peak/20 to 2000 Hz respectively, the ETP21R’s wide supply voltage range (min. 14,4 V, max. 33,6 V), short-circuit and reverse voltage protection as well as a 100 MΩ isolation resistance at 710 VDC ensures reliable and trouble-free operation.


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