Psychrometer With Nist, Rh490

RH490: Precision Hygro-ThermometerHighest 2% RH accuracy with Grains Per Pound (GPP) DisplayFeatures:■Less then 30 seconds of RH response time■Water vapor in GPP■Dual backlit display■Simultaneous display of: Humidity/Temperature, Humidity/Dew Point or Humidity/Wet Bulb■Slim design with rubberized side grips■Data Hold and Min/Max functions