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Humidity Meter, 0% to 100% Relative Humidity, 3 %, 0.1 °C, 105 mm, 185 mm, 36 mm


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TESTO 623   Datasheet
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0% to 100% Relative Humidity







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Technical Documents (2)

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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 TESTO 623 is a thermohygrometer. The thermohygrometer provides a quick and convenient means of measuring the temperature and humidity in offices, living spaces and commercial premises and logs the readings over a period of 90 days. User-defined settings allow user to determine the length of the intervals between measurements from 5minutes to 24hours. The readings are saved automatically over a period of 90 days and an alarm alerts the room's occupants when a threshold has been reached. The large, easy to read display shows a variety of information including the last reading the time and date and a 90 day statistic. This statistic allows to carry out a long term analysis of the indoor temperature or humidity of the room without first having to access users computer.
  • Measuring range from -10°C to +60°C, ±0.4°C accuracy, 0.1°C resolution(NTC)
  • Measuring range from 0%RH to 100%RH, ±2%RH at 25°C accuracy, 0.1%RH resolution(humidity)
  • Dimension is 185mm x 105mm x 36mm
  • Operating temperature range from -10°C to +60°C
  • Measuring rate is 20s
  • ABS housing
  • IP30 protection class
  • 4 x type AA batteries


Test & Measurement


TESTO 623 thermohygrometer, Batteries, Calibration certificate, Wall and table mount.


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.
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