£345.29

Extech RH490 Precision Hygro-Thermometer with Grains Per Pound Display

Green, RH490

Price data last checked 28 day(s) ago - will refresh soon

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About as cheap as it gets. The only time it was cheaper was 3 months ago.

£345 today · all-time low £344 (Apr 2026) · usually £345

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Price History & Forecast

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Last 63 days · 63 data points (no recent data)

Historical
Generating forecast…
£374.45 £340.49 £347.90 £355.31 £362.72 £370.13 £377.54 22 April 2026 07 May 2026 23 May 2026 07 June 2026 23 June 2026

Price Distribution

Price distribution over 63 days • 5 price levels

Days at Price
Current Price
9 days 28 days · current 7 days 7 days 12 days 0 7 14 21 28 £344 £345 £370 £371 £374 Days at Price

Price Analysis

Most common price: £345 (28 days, 44.4%)

Price range: £344 - £374

Price levels: 5 different prices over 63 days

Description
Anyone whose job relies on calculating humidity levels will appreciate the Extech Hygro-Psychrometer. In addition to measuring relative humidity in 30 seconds, this handheld instrument captures dew point, wet bulb, temperature and water vapour levels (Grams per Kilogram and Grains per Pound). This utility tool will store maximum and minimum readings until the memory is cleared and includes a data-hold button for rapidly fluctuating measurements. Complete with carrying case and 9V battery. Box Contains Complete with carrying case and 9V battery

Key Features

Less than 30 second RH response time

Water Vapour in GPP and g/kg

Dual backlit display

Simultaneous display of Humidity/Temperature, Humidity/Dew Point or Humidity/Wet Bulb

Slim design with rubberized side grips

Product Specifications
Brand
Extech
Model
RH490
Colour
Green
ASIN
B000R8DTIK
Category
DIY & Tools > Power, Garden & Hand Tools > Measuring & Layout Tools > Scanners & Testers
Domain
Amazon UK
Release Date
26 February 2016
Listed Since
22 May 2012

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