Temperature - hardly any other value is measured more often. There is a correspondingly comprehensive choice of appropriate measuring technology for this task. Because, in addition to the appropriate measuring instrument, every temperature measurement also requires an appropriate temperature probe.
At Testo, we have been involved in temperature measurement since the company was founded over 60 years ago and therefore know exactly what is important for probes and which measuring devices you need to achieve high-precision results as quickly and efficiently as possible.
Comprehensive selection for all measuring tasks
Individual customised products possible
Calibration via the experts in the Testo Industrial Services subsidiary
Air, water, food, surfaces – there is an appropriate probe for virtually every medium.
You can carry out non-contact measurement of surface temperatures.
Penetration probes also enable immersion measurements in liquids.
Which temperature probe are you interested in?
Cable probes, immersion probes and many other temperature probes and transmitters can be found from the sensor experts at Testo Sensor GmbH.
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There are temperature measurement probes for a variety of media. Their design is different, depending on the task. So, there are different probes for measuring air, on surfaces or in measurement objects. In each of these sub-groups, there are in turn differences in terms of accuracy, response time and measuring range.
Surface probes have a temperature sensor which ensures that the temperature on a measurement object can be determined as quickly and precisely as possible.Cable probes are available for almost every measuring task in the spectrum of temperature measurement. This transmits the measuring values. The radio probe is the opposite of the cable probe. In contrast to the cable probe is the radio probe. With this, the measured values are transmitted wirelessly.
However, no matter what probe is used: they all have a temperature sensor. And in terms of sensors, the following designs can be distinguished:
Temperature measurement with thermocouples is based on the thermoelectric effect: an electric current flows in a circuit if its conductor is composed of two different alloys and their points of contact have different temperatures. If the temperature at one of the contact points is known (cold junction), the "thermoelectric voltage" present is a direct measure of the temperature difference between measuring point (hot end) and cold junction (cold end).
Platinum resistance sensors (Pt 100 sensors) are generally based on the so-called positive temperature coefficient resistor effect (PTC resistor effect). Metals have the property of increasing their electrical resistance as the temperature increases. This can be used for temperature measurements.
Thermal resistors or thermistors are modern, inexpensive temperature sensors made from mixed oxide ceramic. Because they have a strong negative temperature coefficient, the term NTC is also used. Their resistance falls as the temperature rises. They therefore behave in exactly the opposite way to Pt100 sensors.
Thermal comfort level plays an important role when it comes to the feel-good factor for people in the workplace. One element of the thermal comfort level is the so-called radiant temperature. It may for instance be of importance in workplaces exposed to heat (e.g. furnaces). However, solar radiation through an office window also leads to radiant temperatures being too high.
With Testo's globe thermometer, you can measure the radiant heat in a range from 0 to 120°C in accordance with ISO 7243, ISO 7726, DIN EN 27726 and DIN 33403 – essential for norm-compliant comfort level measurement.
Temperature data loggers are ideal for temperature monitoring in storage areas, offices or residential buildings. They deal with measurement, storage and even alarm notifications when there are violations of limit values. On the other hand, with temperature measuring strips virtually every field on the strip is a temperature sensor. The colour of the corresponding area on the measuring strip changes according to the temperature.
When you have to measure temperatures inside a measurement object, the penetration thermometer is the right choice. Along with an appropriate temperature sensor for temperature measurement in foods or liquids, it ensures that you can see all the values straight away. The same is true with the immersion thermometer. Its temperature sensor is also designed for measurements in liquid and semi-solid media.
If you would like to work with your smartphone and want to measure pressure and flow velocities as well as temperature, the Smart Probes from Testo are your first choice. Their compactness, precision, low price and smartphone operation mean they quickly become essential companions.
A surface temperature measuring device is recommended for measuring the temperature on surfaces. The accessories available with surface temperature meters include cable probes and surface probes and the meters enable temperature measurement on surfaces via direct contact with the measurement object.
Or you can opt for thermal imaging cameras from Testo. For their part, thermal imagers fulfil these measuring tasks from a distance without any contact. In addition, they convert the surface radiation of the object into an impressive thermal image.