Extech RH25 Heat Index Psychrometer

Extech RH25 Heat Index Psychrometer

The Extech RH25 Heat Index Psychrometer gives quick climate readings in a compact pen style meter. It measures heat index, humidity, dew point, wet bulb temperature and WBGT in one device. As a result, it helps users make safe decisions when working or training in hot conditions.

Its clear LCD screen shows live readings at a glance and the simple button layout keeps operation easy. The meter fits into a pocket and weighs only 50 g, so it is easy to carry throughout the day. In addition, users can switch between °C and °F to suit different applications.

Reliable Environmental Measurements

The Extech RH25 Heat Index Psychrometer measures relative humidity from 0 to 99.9 %RH and offers an accuracy of ±3 %RH. It also records air temperature, wet bulb temperature and dew point values with a resolution of 0.1°. Therefore, it is suitable for site work, inspections and outdoor activities where climate conditions matter.

WBGT readings help assess heat stress by taking humidity, temperature and radiant heat into account. Meanwhile, the meter can display heat index values up to 205 °C equivalent and monitor very cold conditions down to -46 °C. This gives users a wider picture of the surrounding environment.

Built for Everyday Field Use

The Extech RH25 Heat Index Psychrometer has a moulded housing that stands up to daily use and a recessed sensor cap that protects the probe. Data hold and minimum and maximum functions make it easier to review measurements. Furthermore, the instrument includes an alarm function for heat index and WBGT monitoring.

Power comes from a single CR2032 lithium battery, which keeps the unit lightweight and simple to maintain. Two different set types are available to suit different purchasing requirements and applications. With its compact design and multi-parameter capability, the Extech RH25 Heat Index Psychrometer is a practical tool for monitoring environmental conditions.

Key Features

• Displays heat index and WBGT readings
• Measures relative humidity and air temperature
• Shows dew point and wet bulb values
• User programmable heat index alarm
• User programmable WBGT alarm
• Minimum and maximum value recording
• Data hold function for easy note taking
• Selectable temperature units in °C or °F
• Compact pen style housing for portability
• Protective recessed sensor cap design
• Auto power off with disable option
• Large LCD screen with multiple parameters
• Supplied with CR2032 lithium battery
• Suitable for outdoor work and sporting activities
• Available in two different set types

Technical Specifications

Document Downloads

What’s Included

• Extech RH25 Heat Index Psychrometer
• CR2032 lithium coin cell battery
• User documentation

Meta Description

Extech RH25 Heat Index Psychrometer measures WBGT, humidity, heat index and dew point in a compact pen design for field use.