Temperature measuring instrument

Temperature measuring instruments and thermometers

  • Robust construction
  • High-precision sensor technology
  • Comprehensive selection of probes –
    customized products too
  • Calibration and servicing from one provider

Where do you want to measure temperature?

We at Testo bring you a wide range of Temperature Measuring Instruments which have varied application in many different arenas.

Testo measuring instruments optimally calibrated and compliant with standards to meet individual requirements in the food and pharmaceutical sectors, in industry, in laboratories and in the area of heating, ventilation, air conditioning and refrigeration.

This is to ensure that the needs of every diverse user is met. Cultivated to the most advanced point in order to provide temperature readings and information to the minutest detail, our products are used globally.
Testo offers a full range of optimally calibrated and standard-compliant measuring instruments to measure temperature.

We produce Probe thermometers, Infrared thermometers as well as Surface thermometers, Temperature Data loggers and Thermal Imaging Cameras. All our temperature measurement devices are built in accordance to ISO 9001 quality standards and offer the most reliable

A Testo temperature meter offers you the following

  • Robust construction, even for tough practical use
  • High-precision sensor technology for reliable and accurate measurement results
  • Comprehensive selection of probes for your temperature meter - customized products too
  • Calibration and servicing from one provider

Measuring instruments for temperature measurement

Infrared thermometer

Temperature measuring instruments

Reliable and precise non-contact temperature measurement from a distance.

Surface temperature measuring instruments

Digital thermometer

Temperature measuring instruments with fixed or exchangeable probes for surface temperatures.

Air temperature measuring instruments

Temperature measurement

Precise temperature meter for air temperatures.

Penetration thermometer

Testo temperature meter

Measure temperatures in solid or semi-solid media.

Immersion thermometer

Testo measuring instruments

For temperature measurement in liquids. Can also be used in aggressive media.

Temperature measuring strips

Temperature measuring strips

The really economical alternative to the temperature meter.

Thermal imagers

Temperature monitoring

Visualize temperatures. Ideal for maintenance, the building trade and heating engineering.

Temperature data logger

Temperature data logger

Practical aids for temperature monitoring.

Where do you want to measure temperature?

How to contact us.

Do you have any questions? We're happy to help you.

Regional Office (Singapore, Malaysia, Indonesia)


Temperature measuring instruments in use

Temperature meter

The fields of application for temperature meters, digital thermometers and temperature measuring instruments are very varied. Here are just the most important ones:

  • Spot checking of food
  • Temperature monitoring of food transportation
  • Measuring the temperature in the centre of flue gas flow in chimneys/flue gas ducts
  • Measurement of different air temperatures
  • Surface measurement for checking the pre-heating temperature when welding
  • Immersion measurement in chemical solutions for maintaining temperatures during etching processes
  • Surface temperature measurement on bearings and gear mechanisms in mechanical engineering

Thermometers operated by smartphone

Thermometers operated by smartphone
Thermometer operated by smartphone
  • testo Smart Probes VAC kit testo Smart Probes VAC Kit delivery

    testo Smart Probes VAC kit

    Order-Nr. 0563 0003 10

    • Measurement of air and surface temperature, humidity, air velocity and volume flow
    • Measurement menus for volume flow measurement in ducts and at outlets, identification of mould risk, easy image documentation including IR temperature reading and measurement spot marking

Compact measuring instruments for your smartphone

Our all-rounders for all important measuring tasks. Members of the Smart Probes family are not just temperature measuring instruments. These innovations also include pressure and flow meters, all fully operated via the testo Smart Probes App.

The testo Smart Probes VAC kit enables you to measure temperature, speed and air humidity, as well as to calculate volume flows. Ideal for air conditioning and ventilation systems.

Tips and tricks for temperature measurement and monitoring

Tips and tricks for temperature measurement

A temperature meter in itself means you have already taken the first step. However, you need to bear a few things in mind for really efficient and precise temperature measurement.

Temperature measurement in liquids

With your temperature measuring instrument, choose a probe immersion depth of 10 to 15 times the probe diameter. This reduces measurement errors. In addition, it helps the accuracy of the measurement result if you keep the liquid moving during the measurement.

Surface measurement

In this case, the probe head is placed vertically onto the surface. Here it is important to ensure that neither the contact surface of the probe head nor the measurement object are uneven, as this can falsify the measurement.

Air measurement with a digital thermometer

When measuring moving air with a temperature meter, the measurement probe is simply introduced into the environment being measured. Due to its special design, the air probe has a very short response time. The measurement result can be improved by moving the probe through the air at 2 – 3 m/s during the measurement.

More measuring instruments from Testo

More measuring instruments from Testo

Record temperatures

There are applications where a temperature meter is not enough. For instance, when it is a case of monitoring temperatures over the long term and reliably recording the readings. This is where temperature data loggers are used. The small aids are ideally suited for temperature monitoring, making work a little bit easier every day for quality managers and facility managers all over the world.


When you need to integrate temperature readings seamlessly into automated building services, then it is temperature transmitters that are required. First of all, they measure the temperature, just like a temperature meter – however, they then convert the measuring values into a standardized electrical signal which can be further processed to control specific procedures.

Measure surface temperatures

In the broad spectrum of temperature measurement, particularly high importance is attached to surface temperature measurement. Because it is not just in industry, trade or facility management that a surface temperature measuring instrument is used. The food industry is also – and above all – the sector where this measurement method is one of the most common. In the end, spot checks on the quality of food can be carried out quickly and reliably using surface temperature measurement. And precise measurement of the surface temperature often makes laborious measurement of the core temperature superfluous.