Single Channel Temp. Thermometer – Testo 925

Model No: Testo 925Part No: 0560 9250

This temperature thermometer testo 925 is ideal for surface, air or immersion/penetration temperature measurement in heating engineering, the sanitation sector and refrigeration and air conditioning technology.

  1. Ideally suited to applications in the HVAC field
  2. 1-channel temperature measuring instrument with optional wireless probes
  3. TopSafe, the indestructible protective case, protects from dirt and impact
  4. Continuous display of min./max. values
  5. Audible alarm (adjustable limit values)
  6. Hold-button for freezing measurement values
  7. Large, backlit display


The testo 925 temperature measuring instrument is our all-rounder for temperature measurement in heating engineering, the sanitation sector and refrigeration and air conditioning technology. Take advantage of the thermocouple technology of the attachable temperature probes (type K thermocouple) with this temperature measuring instrument. It enables fast temperature checks and a large temperature measuring range from -50 to +1000 °C (the measuring range is dependent on the probe selected).

The testo 925 temperature measuring instrument meets a wide range of practical requirements

You can attach a type K thermocouple temperature probe to the testo 925. Measurement data transfer by radio means the reading from a wireless radio temperature probe can also be displayed. To meet the wide range of practical requirements, we also offer the possibility of ordering the following probe models:

Temperature probes for surface measurement : for instance, probes with a clamping bracket enable temperature checks on pipes, probes with a sprung sensor element allow temperature measurement on uneven surfaces and temperature probes with a magnet enable measurement on metal surfaces in this area Temperature probes for immersion/penetration measurement:  discover our range of immersion/penetration probes – from flexible or robust, via high-precision, to waterproof Temperature probes for air measurement:  the open sensor element ensures fast response times for air temperature measurement in this area choose the optimum features to meet your needs from our wide range of fast, reliable temperature probes (type K thermocouple) in the “Probes” tab.

Temperature checking with the testo 925: focus on all the benefits

Great features:  large, illuminated display, current values shown, continuous display of min./max. values, hold function to retain readings, acoustic alarm when limit values are exceeded (you can determine the limit values yourself)

Practical optional accessories:  do you know about our little testo fast printer? It prints out your measurement results quickly and correctly right there on the spot. Or the TopSafe protective case? When a probe is connected, it ensures the instrument is protected against water and dirt according to protection class IP 65. Our handy bag and transport case ensure safe storage of the temperature measuring instrument and probes

Measurement data transfer by radio:  the optional radio module means that on the testo 925 you can also receive readings from a radio temperature probe, in addition to the attachable temperature probe. The radio temperature probe sends readings to the measuring instrument over a distance of up to 20 metres where there are no obstructions

Technical Data

Temperature – TC Type K (NiCr-Ni)
Measuring range -50 to +250 °C
Accuracy ±1.0 °C (-50 to -30.1 °C),±0.5 °C (-30 to +99.9 °C),±1 % of mv (+100 to +250 °C)
Resolution 0.1 °C
Reaction time t99 = 10 s (measured in moving liquid)
General technical data
Dimensions 265 x 47 x 20 mm (Probe folded out),163 x 47 x 20 mm (probe folded away)
Operating temperature -20 to +60 °C
Product-/housing material ABS / ABS-PC fibre glass 10%
Protection class IP65
Product colour White
Length probe shaft 102 mm
Length probe shaft tip 32 mm
Diameter probe shaft 3 mm
Diameter probe shaft tip 2.3 mm
Measuring rate 0.5 s
Standards EN 13485
EU-/EG-guidelines 2004/108/EG
Battery Type 2 AAA micro batteries
Battery life 100 h (at +25 °C without display illumination)
Storage temperature -30 to +70 °C
Weight 165 g (incl. batteries)



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