The Greystone Energy Systems RH300 Series Outside Air Humidity transmitters are specifically designed for use in HVAC/BAS applications. These instruments measure relative humidity from 0% to 100%. The Greystone Energy Systems RH310 Series Outside Air Humidity transmitters has dual analog outputs for humidity and temperature.


  • Highly stable RH sensor element
  • Humidity range: 0-100%
  • Accuracy available 2%, 3%, & 5%
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