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Extech RH390 Precision Psychrometer (Humidity & Temperature Meter)

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RH390
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Extech RH390 Precision Psychrometer

Extech's RH390 is a precision psychrometer made for testing ambient air conditions.

This meter has three different modes - it can test humidity/temperature, humidity/dew point or humidity/wet bulb. Both parameters (depending on the mode selected) are displayed on screen at the same time for accurate, reliable measurements of current conditions.

The RH390 has a built-in humidity/temperature sensor on a slightly elongated probe for easier reaching of a specific targeted area. Slim design with rubberised sides make the instrument comfortable to grip, while a large size, backlit LCD display and easy-access buttons make using the RH390 as simple as possible.

This humidity/temperature meter can test humidity levels from 0 to 100% RH and temperature from -30 to 100°C. It also calculates dewpoint across a range from -30 to 100°C and calculates wet bulb across a range from 0 to 80°C.

Additional features of this unit include a data hold function (freezes current value on the screen), MAX/MIN mode (calculates the highest/lowest readings over a period of time) and automatic power off to save battery life.

Extech RH390 Precision Humidity & Temperature Meter Key Features

  • Test ambient air conditions - measures temperature and humidity plus calculates dew point and wet bulb
  • Simultaneous display of humidity/temperature, humidity/dew point or humidity/wet bulb
  • Humidity range from 0 to 100% RH
  • Temperature range from -30 to 100°C
  • Backlit display - easy to use even in poor lighting conditions
  • Slim design with rubberised sides for better grip and one-handed operation
  • Data hold function - temporarily freezes current display
  • MIN/MAX mode - calculate the maximum/minimum values taken over a period of time
  • Automatic power off function (can be disabled if needed)
  • Low battery indicator

What's Included?

  • Extech RH390 Precision Humidity and Temperature Meter
  • Carrying Case
  • 9V Battery

Extech RH390 Technical Specifications

Humidity 0 to 100%RH
Temperature -22 to 199°F (-30 to 100°C)
Basic Accuracy ±2%RH, ±1.8°F/1°C
Max Resolution 0.1%RH, 0.1°F/°C
Dewpoint -22 to 199°F (-30 to 100°C)
Wet Bulb 32 to 176 °F (0 to 80°C)
Dimensions 7.8x1.7x1.3" (200x45x33mm)
Weight 7oz (200g)
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Additional Information
SKU RH390
Manufacturer Part Code RH390
Country of Origin China
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