Extech RH300 Hygro-Thermometer Psychrometer

• Simultaneous display of %RH, Temperature and Dew point or Wet Bulb or Probe Temperature
• Wet bulb measurements without slinging
• Calculates T1-T2 differential (Air Temperature-External Probe Temperature) using optional probe
• Unique sensor cap design twists to closed position for protection during storage
• Switchable °F/°C temperature units with 0.1° resolution

The Extech RH300 hygro-thermometer psychrometer offers simultaneous display of %RH, temperature,
and dew point or wet bulb. An external sensor is also available for probe temperature readings. The handheld
Extech RH300 hygro-thermometer psychrometer, weighing only 3.3 oz. (95g), has a basic accuracy of
0 to 100%RH (±3%RH) for humidity and ±1.8°F (±1°C) for internal and external temperature.

Other features of the Extech RH300 hygro-thermometer psychrometer include data hold, auto power
off, and MAX / MIN readings. This Extech psychrometer can also calculate the T1-T2 differential using the
optional probe and T2-Dew Point.
The Extech RH300 hygro-thermometer psychrometer comes ready to operate with two AAA batteries.