🌍 Worldwide shipping · 30-day returns · Rated Excellent on Trustpilot ★★★★½
Bigamart
Price
$873.99
Home/DIY & Tools/Power, Garden & Hand Tools/Measuring & Layout Tools/Scanners & Testers
Extech RH490 Precision Hygro-Thermometer with Grains Per Pound Display — image 1
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Extech RH490 Precision Hygro-Thermometer with Grains Per Pound Display

★★★★★
$873.99
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About this item
  • 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 description

Product 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

Product details
Brand
Extech
Manufacturer
FLIR Systems
Material
PE_(Polyethylene), PS_(Polystyrene), PLA_(Polylactic_Acid)
Colour
Green
Weight
0.20 kg
Model number
RH490
Part number
RH490
EAN
0793950444900

Customer reviews

What customers say about Bigamart

10 Trustpilot reviews total, with 2 shown at a time.

Trustpilot
★★★★★
Excellent
4.5 average rating
See all reviews →
S
Sigalit
🇮🇱 · January 2026
★★★★★

I wrote to Bigamart's customer support and they accompanied the process of reshipping the item until it finally arrived. I felt a genuine effort to solve the problem till it was finally solved.

V
Verified buyer
🇦🇺 · November 2025
★★★★★

The package was here in Australia from England in a few days — so quick! Something was missing and they refunded it straight away. Pretty happy with these guys.

Showing 1–2 of 10 reviews

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Extech RH490 Precision Hygro-Thermometer with Grains Per Pound Display | Bigamart