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Extech RH25 Heat Index Psychrometer

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Extech RH25 Heat Index Psychrometer


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Extech RH25 Heat Index Psychrometer

Extech RH25 Heat Index Psychrometer



RH25 Heat Index Psychrometer by Extech

Extech's pocket-sized Heat Index Psychrometer Pen easily monitors Heat Index during hot humid days to prevent heat stroke during outdoor activities, sporting events or, indoor workplace. Its pen-sized design makes it convenient to fit into your pocket and carry it wherever you go!


  • Heat Index measures how hot it feels when Humidity is combined with temperature, air movement, and radiant heat. Wet Bulb Globe Temperature (WBGT) considers the effects of temperature, humidity, and direct or radiant sunlight
  • Built-in multiparameter sensor measures Heat Index, WBGT, Humidity, Ambient Temperature, Temperature, Dew Point and Wet Bulb
  • User Programmable Heat Index/WBGT alarm
  • Min/Max/Average
  • Data Hold
  • Auto power off with disable
  • Complete with CR2032 battery
Display Multi-function LCD
Measurement ranges Air Temperature: 20 to 50°C (-4 to 122°F)
Heat Index: -46 to 205°C (-50.8 to 401°F)
Dew Point: -78 to 50°C (-108.4 to 122°F)
Wet Bulb: -20 to 50°C (-4 to 122°F)
Wet Bulb Globe: -25 to 54.5°C (-13 to 130°F)
Relative Humidity: 0 to 99.9% RH
Resolution 0.1°C/°F/%RH
Accuracy Temperature: ±0.6°C (1°F)
Relative Humidity: ±3%RH @ 25 °C from 10 to 90% RH otherwise ±5% RH
Power supply x CR2032 Lithium Battery
Dimensions 140 x 35 x 18mm (5.5 x 1.4 x 0.7")
Weight 50g (1.8 oz.)

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