Surface RTD sensor with cable
  • For measuring temperatures -50...+500 °C
  • Pt100, Pt1000, PTC1000 or NTC sensors
  • Available in 2-, 3- or 4-wire circuit
  • Silicone, teflon or fiberglass insulated cable
  • Quick and easy installation
  • Double RTD sensing element option

ET241 series surface temperature sensors are designed for measuring temperatures on closed pipe systems or other round or flat surfaces. The sensor can be conveniently fixed with a hose clamp or M3 screw. Mounting with hose clamps avoids any mechanical preparation of the measurement site.

Indirect temperature measurement avoids disturbing flow of the medium and the measurement object is hardly affected by the low thermal mass of the sensor. On the other hand, lack of pressure and chemical effects ensures longer lifespan of the sensor.

It must be considered that large differences in temperature between the measurement medium and surroundings have a direct effect on the measurement result. In such cases, additional insulation around the sensor and the cable in at least 10 cm range is advisable. To improve heat transfer from surface to the sensor, heat-conductive paste can be supplied.

4-20 mA transmitter possibility.

Technical Data
Sensing element Pt100, Pt1000, PTC1000 or NTC sensor
Measurement range -50...+250 °C or -50...+500 °C
Protection tube A4 / AISI316L stainless steel
Dimensions Ø4 mm or 6 mm, L50 mm
Protection class IP55 as standard, IP68 on request
Cable 3 wires, red-red-white; 2 wires red-white
Maximum cable temperature (continuous / peak) Silicone insulated 180 / 230 °C
fluoroplast insulated 260 / 310 °C
Fiberglass insulated 480 / 530 °C
Mounting Hose clamp or M3 screw

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