A temperature transmitter is a device that reads a temperature sensor’s signal, then converts it into an analog or digital signal.

If you have to install a sensor far from your control room, then you increase the risk for distortion and interference. Therefore you want a transmitter to amplify and transmit the signal to the control room. We shall analyze them here:

Temperature transmitter types

DIN rail mount

When you have a short distance between the temperature sensor and the control room, low signal interference/distortion, or high vessel temps, then you’ll probably use a DIN rail mount or panel mount transmitter.

These temperature transmitters have an input voltage range of 8 to 35 volts, and you’ll find them used widely because of their low cost. While this type has been around the longest, extensive cabling can make it less accurate.

Novus
TXRail-USB DIN-rail temperature transmitter with USB-port
in the shop from 79 €
8806037306

Field mount

This type of temperature transmitter connects directly to the process, usually installed near the sensor for a stronger signal. Therefore this type provides the safe signal transmission with an amplified signal.

You can get them with a dual chamber to protect the housing from humidity and moisture. Field housings typically come in die-cast aluminium or stainless steel, but you can easily install a display if you need one.

Head mount

These temperature transmitters install directly on the terminal heads of temperature assemblies. So this type provides maximum safety for your signal. Plus, this type requires less wiring, less space, and less money compared to field mounts.

However, extreme vibrations can cause extra maintenance, and fluctuations in the ambient temperature can influence accuracy.

Endress+Hauser
iTEMP TMT188 Temperature head transmitter for thermocouples
in the shop from 84 €
TMT188

Conclusion

Temperature is a crucial parameter to measure, so you need to consider aspects like accuracy, installation, cost, and maintenance when you buy transmitters. If you know the specs of your process, then a good supplier  can help you choose the right temperature transmitter for your needs.

To know more about temperature transmitters, you can get in touch with our engineers!

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