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Extech 445703 Big Digit Humidity & Temperature Indicator

Extech 445703 Big Digit Humidity & Temperature Indicator
sku: 445703
MPN: 445703

  • See the air temperature and humidity in your greenhouse, office, factory or wherever else you need it
  • Completely wall mountable (includes bracket) or can be propped up on tilt stand
  • Extremely large display shows temp/humidity at same time and refreshes constantly

Was: £41.85
You Save: £8.30
£33.55 Incl. VAT £40.26
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Extech 445703 Big Digit Humidity & Temperature Indicator Details

Ideal for use in areas such as greenhouses, offices and factories, this hygro thermometer constantly monitors the overall temperature and humidity of an environment and displays this as numerical readings on an extremely large LCD display.

Both wall-mountable or alternatively suitable for use on a flat surface thanks a built-in stand, the Extech 445703 is a great way to tell at a glance whether the environment is working within normal parameters. It can measure temperature from 14 to 140°F (-10 to 60°C) and humidity between 10 to 99%RH with accuracy of 5% RH, 1°C, and 1.8°F (@ 0 to 50°C/32 to 122°F). Both parameters are measured and displayed at the same time.

In addition to general measurements the 445703 also can carry out MIN/MAX calculations and features the ability to switch between Celsius and Fahrenheit measurement functions.

Extech 455703 Big Digit Hygro Thermometer Key Features

  • Simultaneous measurements of humidity and temperature
  • Extremely large LCD screen
  • Temp measurement range of 14 to 140°F (-10 to 60°C)
  • Humidity measurement range of 10 to 99%RH
  • Accurate to 5% RH, 1°C, and 1.8°F (@ 0 to 50°C/32 to 122°F)
  • Switch between Celsius and Fahrenheit modes
  • Low battery indicator

Full List of Products Included

  • Extech 455703 Big Digit Hygro Thermometer
  • Built-in Tilt Stand
  • Wall Mounting Bracket
  • 1.5V AAA Battery
Technical Specs

Part Code: 445703
(Size: 175 KB)

Extech 445703 Technical Specifications

Humidity Range 10 to 99% RH
Basic RH Accuracy ±5% (25 to 80%)
Temperature Range 14 to 140°F (-10 to 60°C)
Basic Temperature Accuracy +/-1.8F/1°C (14 to 122°F)
Dimensions 4.3 x 3.9 x 0.78”(109 x 99 x 20mm)
Weight 6oz (169g)

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Excellent Low Cost

Review by MikeL (Posted on 20/07/2016)


This is an excellent low cost thermohygrometer that is simple to use. It is ideal for monitoring store rooms, greenhouses etc. I bought two and they are great.

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