Temperature Measurement Products

Temperature Measurement Products

In many areas of daily life, we encounter temperature measuring devices in a wide variety of forms and functions. The simplest form is probably the well-known thermometer in glass design. Commercially available devices usually show a temperature range of -20 degrees to +70 degrees. In addition to this standard product but many other variants are needed for industrial purposes. Temperature measuring instruments are used in many areas, such as heating, air-conditioning and ventilation technology, in machine, plant and apparatus construction as well as in container and pipe production. Their measuring range usually extends from – 250 degrees up to + 1,800 degrees.

Designs and measuring technology

In temperature measurement, a distinction is made between the design and the measuring technology used. In addition to the mechanical and analogue mercury and dial thermometers, we also find powerful digital display devices in our designs. We find a special form in the mechatronic measuring devices, which represents a combination of mechanical temperature measuring technology with mechanical as well as digital switching outputs. A typical application would be given here if a previously set temperature reading is reached. If this is the case, then a corresponding signal or switching output is activated and triggers a reaction.

Versatile measuring methods

Measuring instruments with a mechanical measuring method are so-called expansion thermometers. These include the device classes of the bimetal, gas pressure or Tension thermometer. In this case, the physical extent of the measuring body is used in order to evaluate the measured value. With bi-metal thermometers, two bonded metal strips with different expansion behavior form the basis of measurement. The curvature of the metal strips arising on contact with the measuring medium is displayed on a scale via a pointer mechanism.

For gas pressure thermometers, the physical expansion of the measuring medium is also used as a parameter. This thermometer mold is operated with a gas or gas mixture as a sensor. Via a separate capillary line the expansion of the gas or gas mixture is fed to a spring mechanism or a pressure box. This in turn reliably displays the measured size on a scale. Tension thermometers use a liquid as the measuring medium. When the temperature changes, there is a pressure change in the liquid, which can be evaluated and displayed accordingly.

A third class of temperature measuring instruments is represented by the electrical temperature measurement technology. Various sensors such as thermocouples, resistance thermometers, transmitters or temperature switches are used here. With a resistance thermometer, the electrical resistance changes depending on the temperature. This change can be electronically recorded and displayed. Temperature switches can generate not only the temperature measurement but also corresponding control signals, which are often used in process technology. Temperature transmitters can be used directly on site, e.g. Can be used as DIN rail variant in a measuring cabinet.

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