Temperature Sensors in Heating Systems

Keeping indoor spaces warm during the winter is a matter of course for us. Within heating systems and thermostats, temperature sensors are used to control the heating inside.

Within heating systems, temperature sensors are used to measure the current temperature. They forward the information to a central control where it is compared to the target or set values. 

If the thermostat is set to a certain level between 1-5, a certain temperature is associated with it. With setting 3, for example, it is around 20 degrees Celsius. Each increase or decrease by one position corresponds to a temperature change of 3 to 4 degrees Celsius.

Temperature sensors work analogously. They do not rely on external energy supply and use materials that react to the temperature. This makes them particularly reliable and practical for use in heating systems.

At Variohm, we offer various temperature sensors with different sensor elements that can be used in heaters and heating systems. The types we have available are NTC thermistors, PTC thermistors, RTDs and various types of probes.

Thermistors for Heating Systems

Depending on customer requirements, NTC sensors can be cast into different, individual housings. Thermistors offer a fast response time and are available in very small sizes. The high sensitivity enables a very precise measurement. They have an average temperature range of -40 ° C to + 125 ° C for epoxy resin-encapsulated NTCs and up to + 250 ° C for our glass-encapsulated Thermistor range.

Many of our thermistors have a negative temperature coefficient (NTC), which means that their conductivity increases with increasing temperature. As a result, the electrical resistance drops as soon as the temperature increases. One advantage of the NTC thermistor is that they are inexpensive to manufacture. 

RTDs for Heating Systems

Variohm offers RTD sensors, which are also known as platinum elements. Here the resistance increases with the increased temperatures. These temperature sensors use RTD technology (Resistance Temperature Detector) and are available from Variohm as ERTD PT100 / PT1000 or ERDT2 .

RTDs have a lower sensitivity but are suitable for measuring different temperature ranges up to 500 ° C and more. RTDs are mainly used in the industrial sector because they offer better long-term stability and a higher temperature range. Like Thermistors, they can also be cast in different housings depending on customer requirements.

NTC and RTDs are used to measure the flow and return temperatures as well as the outside temperature.

Temperature Sensors for Heating Systems from Variohm

We have a wide range of temperature sensors available on our website. Some of these are well suited to applications in heating systems.

• NTC Thermistors
• RTD Sensors
• Temperature Probes

If you have further questions about our temperature sensors for heating systems, please contact us.