Skip to product information
1 of 1

Extech RH25 Heat Index Psychrometer

Extech RH25 Heat Index Psychrometer

Regular price $119
Sale price $119 Regular price $0
Shipping calculated at checkout.
Request a Quote
Estimated Delivery in
5 - 7
business days (based on availability)

🎓 Request a Quote To Get An EDU Discount

Login & Get 2% Back on Purchases
Login or Sign Up for Loyalty

Extech RH25 Heat Index Psychrometer

Key Features At A Glance

  • Built-in multiparameter sensor measures Heat Index, WBGT, Humidity, Ambient Temperature, Dew Point, and Wet Bulb
  • User-programmable Heat Index/WBGT alarm for hot, humid conditions
  • Min/Max/Average, Data Hold, and auto power off with disable
  • Pocket-sized pen form factor: 5.5 x 1.4 x 0.7 in (140 x 35 x 18 mm), 1.8 oz (50 g)
  • Relative humidity 0 to 99.9%RH with ±3%RH basic accuracy
  • Temperature -4 to 122°F (-20 to 50°C) with ±1°F/0.6°C accuracy
  • Complete with CR2032 battery
View full details

The Extech RH25 is a pocket-sized Heat Index Psychrometer Pen that monitors Heat Index during hot, humid conditions. Its pen-sized design fits into a pocket so it can be carried wherever it is needed, putting multiparameter environmental measurement into a single handheld instrument.

The RH25 is intended to monitor Heat Index during hot humid days to help prevent heat stroke during outdoor activities, sporting events, or in the indoor workplace. It targets situations where the combination of heat and humidity creates a thermal-stress hazard that a simple thermometer would not reveal.

ValueTronics stocks and holds its own inventory in a 20,000 sq ft secure warehouse at 1675 Cambridge Drive in Elgin, Illinois.

Brand Heritage

Extech is a measurement-instrument brand of FLIR Systems, which acquired Extech Instruments in 2007.

Accessories Supplied

  • CR2032 battery

Product Core & Specifications

Parameter Range Resolution Basic Accuracy
Temperature -4 to 122°F (-20 to 50°C) 0.1°F/C ±1°F/0.6°C
Relative Humidity 0 to 99.9%RH 0.1%RH ±3%RH
Wet Bulb -4 to 122°F (-20 to 50°C) 0.1°F/°C
Dew Point -108.4 to 122°F (-78 to 50°C) 0.1°F/°C
Heat Index -50.8 to 401°F (-46 to 205°C) 0.1°F/°C
WBGT -13 to 130°F (-25 to 54.5°C) 0.1°F/°C
General
Dimensions 5.5 x 1.4 x 0.7" (140 x 35 x 18 mm)
Weight 1.8 oz (50 g)

About this New unit

This is a brand-new, factory-sealed unit, supplied exactly as it arrives from the manufacturer and backed by the full manufacturer warranty. For the exact configuration, available options, included accessories, or current lead time for your application, our Test Architects can confirm the details before you order.

ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application.

Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.

Model No

Extech

Condition

Factory New

Manufacturer

Extech