STP300 The STP300 is an electronic immersion temperature transmitter that converts a measured temperature into an electronic current signal 4 to 20 mA. The STP300 is designed for immersion mounting in pipe systems with a separate pocket/well. The pocket/well is sealed, making it easy to replace the transmitter if necessary. For a new installation the pocket/well must be ordered separately. The transmitter is intended for measurement of high and low temperatures. The transmitter is connected with a 2-wire cable, which serves both as power supply and for signal transmission. The reading of the measured signal is done over an external load resistance. Specifications Output 2-Wire, 4 to 20 mA Range 0 to 100 °C, 0 to 160 °C, -50 to 50 °C (32 to 212 °F, 32 to 320 °F, -58 to 122 °F) Accuracy ±0.4% of range Supply 15 to 36 VDC