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What is a Threaded Probe?

Threaded probes have a threaded process connection and usually rather short immersion lengths. They are typically used to measure fluid temperatures in pipes, small tanks or boilers. This is why we often refer to them as “boiler temperature sensors” or “boiler probes”. 

Characteristics of Threaded Probes

Since boiler sensors usually touch the medium directly, they are quite precise and responsive. To ensure maximum water tightness and robustness, we mould either a connector or a cable transition directly onto the probe. With boiler probes, unscrewing the probe automatically means opening the process. This means that depending on your application, you’ll either have to empty the boiler or stop the process before removing the probe.  


A screw-in temperature probe with M12 connector and G1/8 thread

Threaded Sensors


Threaded Temperature Probes



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Which sensing element should you choose?

Typically, low-cost boiler probes come with NTC sensors. If the temperature range of an NTC is not enough, a Pt100 or a Pt1000 can be a good solution. The choice comes down to your application and requirements. Get in touch with our experts and we are happy to find the best solution for you!

Suggestions for Threaded Probes

As with all types of temperature sensors, the immersion length should be min. 5x the diameter of the probe in order to avoid thermal bridges.



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