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Extech RH490 Precision Thermohygrometer

Extech Instruments
SKU: EXTERH490
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Key Features
  • Measures relative humidity (0 to 100% RH) and temperature (-30˚C to 100˚C)
  • Calculates dew point from -30˚C to 100˚C and wet bulb temperature from 0˚C to 80˚C
  • Also measures absolute humidity from 0 to 160g/kg (0 to 1120 GPP)

Related Categories

Hygrometers & Humidity Meters
Description

Extech RH490 Precision Thermohygrometer

The Extech RH490 Precision Thermohygrometer is capable of measuring humidity in terms of both a percentage and grains per pound or grams per kilogram. It has a relative humidity measurement range of 0 to 100% RH – with ±2% RH accuracy – and an absolute humidity (water vapour) measurement range of 0 to 160g/kg.

Alongside humidity measurements, the Extech RH490 also measures air temperature from -30˚C to 100˚C which enables calculations of dew point (-30˚C to 100˚C) and wet bulb (0˚C to 80˚C).

The Extech RH490 has a dual digital display that shows humidity readings alongside temperature, dew point and wet bulb values. Min/max readings can be recalled to the screen and a data hold function helps freeze a reading when it is fluctuating rapidly.

The slim, compact design of the Extech RH490 makes it easy to handle and use. It comes supplied with a carry case and battery and is covered by a one-year warranty.

Extech part number: RH490

Key Features

  • Relative humidity: 0 to 100% RH
  • Air temperature: -30˚C to 100˚C
  • Dew point: -30˚C to 100˚C
  • Wet bulb: 0˚C to 80˚C
  • Absolute humidity: 0 to 160g/kg (0 to 1120 GPP)
  • Min/max readings and data hold
  • Slim, compact design
  • One-year warranty

What's In The Box?

  • Extech RH490 Precision Thermohygrometer
  • 9V battery
  • Carry case
  • Instructions for Extech RH490
Specification
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Specification
Yes
  • 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)
  • Absolute Humidity: 0 to 1120GPP (0 to 160g/kg)
  • Dimensions: 7.8x1.7x1.3" (200x45x33mm)
  • Weight : 7oz (200g)
Reviews
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£331.62 (Inc. VAT) £276.35 (Ex. VAT)