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Extech RH390 Precision Psychrometer

Extech Instruments
SKU: EXTERH390
  • Measures relative humidity from 0 to 100% and temperature from -30˚C to 100˚C
  • Calculates dew point from -30˚C to 100˚C and wet bulb from 0˚C to 80˚C
  • Slimline ergonomic design with rubberised sides
More Info
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Extech RH390 Precision Psychrometer

The Extech RH390 Precision Psychrometer is a highly accurate instrument for measuring humidity and temperature. It has a relative humidity range of 0 to 100% RH with basic accuracy of ±2% RH and a resolution of 0.1% RH whilst the air temperature range goes from -30˚C to 100˚C with ±1˚C accuracy and 0.1˚C resolution. These measurements allow the psychrometer to calculate dew point and wet bulb values.

The Extech RH390’s dual digital display shows humidity readings alongside temperature, dew point or wet bulb. It is operated using a simple push-button interface and boasts data hold and min/max recall functions. The slimline design with rubberised sides makes it very easy to grip and use.

A carry case and 9V battery are supplied as standard with the Extech RH390 and it is covered by a one-year warranty.

Extech part number: RH390

Key Features

  • Relative humidity: 0 to 100% RH
  • Ait temperature: -30˚C to 100˚C
  • Dew point: -30˚C to 100˚C
  • Wet bulb: 0˚C to 80˚C
  • Highly accurate measurements
  • Slimline, ergonomic designs
  • Data hold and min/max
  • One-year warranty

What's In The Box?

  • Extech RH390 Precision Psychrometer
  • Carry case
  • 9V battery
  • Instructions for Extech RH390
Specification
  • Humidity: 0 to 100% RH
  • Temperature (Internal): -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)