Datasheet

PRODUCT DATASHEET

Features

PRODUCT DATASHEET

RH25 Heat Index

Psychrometer

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!

Relative Humidity

Measurement/Calculation modes:

Heat Index Temperature Dew Point Wet Bulb

Features

• 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

Ordering

RH25 ................. Heat Index Psychrometer

www.extech.com

Rev. 1/6/15

TEMP

Speciﬁcations

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

DImensions 5.5x1.4x0.7" (140x35x18mm)

Weight 1.8oz (50g)

Wet Bulb Globe

Temperature (WBGT)

FPM

TEMP