B + B Thermo-Technik Thermal Sensor Corded probe 616691 - B+B Sensors 0551 3131, The B + B Thermo-Technik 0551 3131 corded probe measures temperatures from -40 to +125 °C and humidity from 0 to 100 RH. This temperature sensor is ideal for precise environmental monitoring in industrial or laboratory settings. The reliable thermometer ensures accurate readings, supporting various climate control applications. B+B Thermo-Technik 0551 3131 Corded Probe 0-100 RH 0-10V/4-20mA Output