To use thermometers properly, you should also know more about configurations. This is similar to when you are choosing a laptop or smartphone,  you need to think about what you need and what you can find on the market to fit those needs.

Today, our article reviews the most common configurations of thermometers as well as discusses the pros and cons of each.

B+B Thermo-Technik GmbH
TF-GLT Typ EXT Compact thermometer with PT100 senor and cable connection
in the shop from 81 €
TF-GLT-EXT-T1

To know more about thermocouples, you can read the Visaya Article on Thermocouple Types and to find out more on the difference between RTD and Thermocouoples, you can read the Visaya Article on RTD vs Thermocouple

Thermometer types and configurations

MI cable probes

Mineral-insulated cable probes work well in odd or difficult spaces. If you need circular or small cables and flexible installation, then check these out.

MI cable probes can bend and wind into coils, and you can use them directly or as extension cables. They can also withstand high pressure and vibration.

Pros

  • Good flexibility
  • Low cost
  • Good strength (although thermowells are stronger)
  • Faster response than sensors with thermowells

Cons

  • Moisture can cause electrical leakage
  • Vibration can cause damage
  • Exposure to process conditions can cause damage

Compact thermometers

Compact thermometers come into play in applications with tight spaces. Often used with RTDs, they take up little room and offer reliability with easy installation. You’ll also find them most in industries like utilities or food and life sciences.

Pros

  • Size allows easy installation in small spaces
  • Fast response
  • Low cost
  • High accuracy from 0.15 to 0.55 °C with respect to measurement span

Cons

  • Susceptibility to changes in ambient temperature
  • Susceptibility to proximity of process connection
  • Limited number of electrical connections (M12 plugs only)

Modular thermometers

These devices allow you to build your own sensor to suit your process. A modular thermometer needs the following parts:

  • Insert – Measuring element
  • Electronics – Transmitter or terminal blocks to connect the sensor to the wiring
  • Head – Protection for the electronics
  • Neck – Extension between head and thermowell
  • Process connection – Threads, clamps or flanges to connect the sensor to the process
  • Thermowell – Protection for the insert (also allows change or replacement without interrupting the process)

To know more about modular thermometers, you can check out TM401/411 on the Visaya shop. Our Product Review can also help you to know the specifications of the device.

Endress+Hauser
iTHERM TM411 Innovative, modular resistance thermometer for the food industry
in the shop from 425 €
TM411

Modular thermometers give you lots of flexibility, so you can choose the right insertion length, process connection, and electronics for your needs. You could create dozens of usable configurations. And these robust devices can operate in hazardous areas with the right connections. You’ll find them mostly in general applications.

Pros

  • Flexible selection of components
  • Good protection from process media
  • Robust build
  • Exchangeable parts

Cons

  • Potentially challenging part selection
  • Larger than average size
  • Slow response compared to sensors without thermowells
  • High cost

Ceramic thermocouples

You’ll see ceramic thermocouples – usually types B, S, and T – in hot areas like furnaces and ovens. These devices use inserts, ceramic protection tubes, sleeves, and process connections. They can also withstand temps from 1200 to 1800 ˚C.

Pros

  • High heat resistance
  • Simple construction
  • Decent cost

Cons

  • Limited lengths
  • Remote electronics
  • Fragile build
  • Extra work for installation (heating cycles)
Endress+Hauser
Easytemp TMR35 Compact hygienic thermometer
in the shop from 116 €
TMR35

To know more about this, you can also read the Visaya Product Review

Key takeaways

Temperature accuracy demands precision, but one of these devices should suit your process, as long as you check your needs carefully. So, you can visit the Visaya shop to learn more about each and decide which will work best for you.

To know more about such products, you can get in touch with our engineers!

Recommended articles