Status instruments sem162 dual channel rhtemp tx interchangeable sensors status instruments sem162dhp02 a duct mounting dual channel relative humiditytemperature transmitter that can transmit measurements of rh temperature dew point and delta t with the output being dual industry standard two wire 4 to 20ma the unit is designed to digital sensor that plugs into the sensor stem configuration is easy via the usb with the user able to measure any two parameters as well as being able to