RO120-W is a wall mount precision humidity  transmitter

The RO120-W precision humidity  transmitter Series measures humidity, temperature and dew point or barometric pressure applications and offers many other psychometric calculations. The three measurements in one probe allows the end-user flexibility where space constraints are a concern. The series is configured for wall and duct applications, includes a 2 line LCD display and offers field replaceable sensor tips where interchangeability is within ±1%.  
  • Dew point: -60°C to +95°C (factory default) for remote units
  • RH 0-95%RH (non-condensing)
  • Calibration performed down to -60C
  • Speed Response: < 12second response time that is T63, 0 to 90%
  • Dew point accuracy: +/- 1.0C from +40°C to -20°C +/- 3.0C <-20C
  • Three 4-20mA outputs or a RS232 (see configuration table)
  • Temperature range: -40°C to +60°C