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Vaisala HMD60U / HMD60Y / HMD60T RH&T Transmitters

Vaisala HMD60U, HMD60Y and HMD60T Relative Humidity and Temperature transmitters offer an economical solution for general purpose RH&T measurement in HVAC and building automation applications.   The Vaisala HMD60U and HMD60Y incorporates HUMICAP technology for a reliable, stable and accurate indication of relative humidity and temperature in duct systems designed for building ventilation. Vaisala HMD60T is a temperature only version. Vaisala HMD60 transmitters are suitable for many industrial humidity and temperature monitoring applications.  The incorporated HUMICAP sensor is also offered in many more expensive Vaisala RH&T transmitters for its resistance to chemical attack and established stability.


Note that these transmitters are now discontinued and have been replaced with the Vaisala HMD60 Series.


A unique feature of the Vaisala HMD60U, HMD60Y and HMD60T duct mount transmitter is the ability to remove the electronics without removing the unit from the duct itself.  Additionally calibration can be checked onsite with a Vaisala HM70 portable RH&T sensor.  Adjustment is simply carried out via a potentiometer until reading matches that of the portable reference sensor.


Vaisala HVAC Duct Mount RH&T transmitter, models:

  • HMD60U – Relative Humidity output only (0…100%RH)
  • HMD60Y – Relative Humidity and Temperature output (0…100%RH & -20…+80C)
  • HMD60T – Temperature output only (-20…+80C)


Vaisala HMD60U, HMD60Y and HMD60T Duct Mount RH&T transmitter, specifications:

  • 2-wire, 4-20mA loop powered devices
  • HUMICAP RH Sensor with uncertainty < ±2%
  • Pt 1000 RTD Class F0.3 IEC 60751 Temperature Sensor
  • IP65 weatherproof electronics housing
  • Factory calibration included as standard
  • Onsite calibration and adjustment via Vaisala HM70 portable


Fluidic are a recognised partner of Vaisala CEN (Industrial division) for Scotland and the North of England.  Our instrumentation engineers are product trained and able to help with instrument selection within the full range of Vaisala Relative Humidity and Temperature transmitters.  In addition we also have a range of cleanroom focused instrumentation for the measurement of pressure, flow, temperature and level monitoring.  Please call either office for more information (Glasgow 0141 641 5920,  Warrington 01925 572401).




  • Download Vaisala HMD60 RH&T Transmitter datasheet
  • Download Vaisala HMD60 RH&T Transmitter User Guide
  • Download Vaisala HMD60 RH&T Transmitter Wiring details
  • Download Vaisala Choosing the right humidity sensor
  • Download The Vaisala HUMICAP sensor
  • Download Vaisala Indoor Air Quality Application note
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