The analog Vaisala HMD112 Humidity and Temperature Transmitter is designed for accurate humidity and temperature measurements in HVAC and cleanroom applications.

With RH accuracy of ±2 %RH, the transmitters have been calibrated with 3-point NIST traceable calibration (certificate included).

HMD112 transmitter is equipped with the proven HUMICAP® 180R sensor. The sensor’s superior long-term stability minimizes maintenance needs throughout the transmitter’s lifetime. If necessary, the transmitter can be field-calibrated using either an HM70 Hand-Held Humidity and Temperature Meter, or a PC connection.

Analog outputs are preset at the factory to:
Channel 1: 4 ... 20 mA = 0 ... 100% RH
Channel 2: 4 ... 20 mA = -40 ... +60 °C (-40 ... +140 °F) T