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Testo 623 Thermohygrometer

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  • Measures air temperature from -10˚C to 60˚C and humidity from 0 to 100%
  • All readings shown on screen alongside bar graph for previous 90 days
  • Long-term sensor and 12-month battery life allow continuous monitoring

rrp £135.00

now £110.00 (Ex. VAT) £132.00 (Inc. VAT)

rrp £135.00


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  • Description

    Testo 623 Thermohygrometer

    The Testo 623 Thermohygrometer measures air temperature from -10˚C to 60˚C and humidity from 0 to 100% RH which is ideal for monitoring atmospheric conditions in store rooms and laboratories. Measurements are taken every 20 seconds and are precise to 0.1˚C and 0.1% with high levels of accuracy.

    Readings for both air temperature and humidity are shown simultaneously alongside the time and date on the Testo 623’s large backlit screen which is easily legible from a distance. Notably, a bar graph for the last 90 days is displayed on screen so the user can check conditions at a glance without having to consult a computer.

    Operating the Testo 623 is quite easy thanks to the push-button interface and it is also possible to set an alarm which will indicate when humidity or temperature reaches a problematic level. A hanging/standing bracket is included on the back of the thermohygrometer so it can be positioned anywhere around a room. The 12-month battery life and long-term sensor make the Testo 623 ideal for long-term measurement.

    Testo part number: 0560 6230

    Key Features

    • Air temperature range: -10˚C to 60˚C
    • Humidity range: 0 to 100%
    • Measurement rate: 10s
    • Large, backlit screen
    • Bar-graph for preceding 90 days
    • Alarm function
    • Hanging/standing bracket
  • Specification

    NTC Air Temperature

    • Measuring range: -10˚C to 60˚C
    • Accuracy: ±0.4˚C
    • Resolution: 0.1˚C


    • Measuring range: 0 to 100%
    • Accuracy: ±2%
    • Resolution: 0.1% RH


    • Storage temperature: -20 to +60 °C 
    • Measuring rate: 20 s 
    • Operating temperature: -10 to +60 °C 
    • Battery life: 12 months 
    • Weight: 240 g (without batteries) 
    • Dimensions: 185 x 105 x 36 mm
  • Supplied Accessories

    • Testo 623 Thermohygrometer with Pressure Indication
    • Calibration protocol
    • Batteries
    • Attachment material
    • Instructions for Testo 623
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  • Delivery Information

    At Test-Meter.co.uk we understand the importance of a reliable delivery service when shopping online. Especially when the goods are often essential to your working day. If your goods are required by a certain date please feel free to contact us for an honest and realistic indication whether this can be met. We aim to process all orders we receive within 1 to 3 working days, however from time to time we do have an increased demand for certain products or there might be delays from the manufacturer. In such cases delivery of your equipment may be subject to a minor delay.

    We use DPD/Interlink for all larger items and Royal Mail for smaller items and accessories. With DPD/Interlink you will receive a 1 hour delivery window on the day of delivery via e-mail/text and a notification 15 minutes before arrival so you will not have to wait around all day. You can even manage your booking online and re-arrange delivery for another date or arrange the goods to be left with a neighbour of your choice.

    We also offer delivery options for goods required urgently on certain products, all which are sent by DPD/Interlink.

    Our charges for UK deliveries:

    • FREE Delivery (on select products only): typically 3-5 working days*
    • Standard Delivery at £4.95: 2-3 working days
    • Next Working Day Delivery (on select products only) at £7.50
    • Pre-Noon Next Working Day Delivery (on select products only) at £9.50*
    • Pre-10.30am Next Working Day Delivery (on select products only) at £18.50*
    • Saturday Pre-Noon Delivery (on select products only) at £14.50*
    • Sunday Pre-Noon Delivery (on select products only) at £14.50*

    *UK mainland only

    NOTE! For next working day or Saturday/Sunday delivery options the order MUST be placed no later than 3pm on the working day before delivery is required. After 3pm, please arrange with our staff before selecting a priority delivery service. Priority services are available to UK mainland residents only (this might exclude certain areas in the north of Scotland).

    Customers outside the UK:

    Test-Meter.co.uk exports to many countries all over the world. Prices for shipping vary on location and weight/dimensions. Costs are calculated for certain countries at the checkout. If your country is not included in this list please e-mail admin@test-meter.co.uk with your name, address and the items you would like to order for an accurate shipping quote or go to http://www.test-meter.co.uk/test-equipment-export for more information.

    For more information on delivery, please see our terms and conditions.