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Humidity Meter, 20% to 95% Relative Humidity, 5 %, 0.1 °C, 18 mm, 54 mm, 9 mm


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GTIN UPC EAN: 793950440032
Technical Datasheet:
RHT3   Datasheet
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20% to 95% Relative Humidity







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Technical Documents (1)

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CAD Models - Notice
CAD Models and drawings are provided to you on a revocable limited licence for your internal use only but remain the property of the manufacturer who retain all intellectual property rights and ownership. They are provided to assist you in decision making and as design guide but are not guaranteed to be error free, accurate or up to date and is not intended to be taken as advice.
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Product Overview

The RHT3 from Extech Instruments is an EzSmart Hygro-Thermometer. The RHT3 is an EzSmart Hygro-Thermometer for use with Android or iOS Smart Devices. The RHT3 comes with a free app from iTunes and Google play for taking readings and further analysis. It measures humidity and temperature simultaneously, calculates wet bulb and dew point temperature, continuous graph plots humidity and temperature changes over time, 5 user-settable high/low alarms for both temperature and humidity and post images directly to social media. It has 4 records each contains 100 data points with humidity, temperature, wet bulb and dew point, plus time, date and GPS coordinates.
  • Relative humidity measurement ranging from 20% to 95%RH with 0.1%RH resolution and ±5% RH accuracy
  • Temperature measurement ranging from -20 to 60°C with 0.1°C resolution and ±1°C accuracy
  • Wet bulb (calculated) measurement ranging from -4°F to 140°F with 0.1°F resolution
  • Dew point (calculated) measurement ranging from -40°F to 140°F with 0.1°F resolution
  • Dimension is 0.7" x 0.35" x 2.1" (18mm x 9mm x 54mm) and weight is 0.25oz (7g)
  • Stores time, date and GPS co-ordinates
  • Ability to post images directly to social media
  • Includes built-in sensor, connector cap and strap


Test & Measurement


RHT3 EzSmart hygro-thermometer, Built-in sensor, Protective connector cap with strap.


In addition, we have calibration services for this product. Choose from a Standard Certificated Service or an internationally recognised UKAS accredited calibration. Visit our calibration service page for more details.

Also Known As

GTIN UPC EAN: 793950440032

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More stock available to supplier lead times which is approximately 5/8/23

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