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Temperature transmitter

Temperature transmitters and their importance

Temperature transmitters are above all used in the industrial sector. They were developed to enable the conversion of temperature-dependent voltage or resistance changes into other output signals. This includes the 4-20 mA or 0-10 V signals.

These standardized signals can then be read by other electronic instruments. The transmission is reliable and fast and can also be carried out over longer distances. The development of temperature transmitters has made measurement considerably easier. The measuring values were previously transmitted via cable. It was not possible to process them until later.

Advantages of Testo temperature transmitters

There are a variety of points that may be of interest when it comes to selecting a model for industrial use:

  • integrated humidity measurement sensors

  • self-monitoring by the instrument

  • presence of analog outputs

  • long-term measurement stability

  • accuracy of the measurements

Overview of temperature transmitters

Temperature transmitters in use

The design of the temperature transducer enables it to record the temperature in special areas. This may be the temperature in cleanrooms, but also in other sections. To do this, you work with a temperature probe or an integrated sensor. The temperature is measured by the resistive sensors. This is when the real work of the temperature transmitter starts. The temperature transducer converts the results. They are emitted in a linear output signal. This may be 0-10 V or 4-20 mA.

Dew point transmitter

Product selection

Temperature transducers and their integrated features

Temperature transducers are equipped with a variety of features. These features can definitely vary, depending on the instrument. If you simply just want to convert Celsius and then further process these data, you need instruments with less detailed features than those for measurements required in terms of long-term quality testing. Many transducers have two analog outputs, which enable temperature and humidity to be converted.

If you decide on a temperature transmitter which is mounted on the wall or on equipment, you should check whether it allows data reconciliation without disassembly. Another important point is the precision of the measurements. Just like other measuring instruments, the temperature transmitter also has different measuring ranges and small differences. The focus should be on precision, depending on how important a detailed measurement is.

Other transmitters

In addition to the temperature transmitter and the humidity transmitter, there are also other transducers in use: pressure transducers, flow transducers and voltage transducers.

Transducer with humidity measurement facility

The temperature transducer often also has an additional humidity measurement facility. This is above all used when the ambient conditions are critical. There are high demands when it comes to air conditioning technology. These have to be met in order to enable product quality to be maintained. High degrees of measuring accuracy which can be achieved with the transducer also mean the measurement of higher temperatures is definitely possible. However, irrespective of whether there is an integrated humidity measurement facility, there are also some advantages which a high quality Testo temperature transmitter can offer:

  • Versatile areas of application, such as building automation

  • versatile fields of application, such as automated building services

  • high degree of measuring accuracy

  • high level of reliability in terms of measuring results

Transducers and their advantages

The instruments which Testo has on offer, no matter whether they are humidity measuring instruments, differential pressure transducers or temperature transmitters, are not as a rule purely designed for measurement. They also have other advantages. This includes an integrated diagnostic function. Depending on the software that is installed, the instruments do not just measure values. Additional parameters are also checked. These may for instance be supply voltages or also feed line resistances. If faults occur here with the parameters, a signal is output.