The HMP230 series are microprocessor based instruments, remote sensor, for tight places. Two analogue outputs: temperature and humidity (RS232 possible). Temperature sensor: Pt 100 sensor. Umidity sensor: HUMICAP® sensor (capacitance based thin polymer film water molecules absorption): range is 0...100 %RH . Precision: at the relative humidity 50 %RH, a difference of ±1 ° causes an error of ±3 %RH). Two meter sensor head cable. Temp limit function: up to +80 or +120 °C.