TSM clamp-on RTD: Technology

How does ifm's TSM clamp-on RTD work?

The ifm clamp-on RTD was designed with careful consideration for the effects of ambient temperature on surface mount sensors. In the image to the right, you can see the RTD positioned to make direct contact with the pipe where temperature measurement occurs, with heat flow indicated by the red arrows. The increased contact area of the TSM design ensures optimal heat transfer between the sensor and the surface, leading to faster response times and more accurate readings.

Solid contact with the measurement area also reduces interference from ambient air, helping the RTD capture the true surface temperature without influence from surrounding conditions. Since air acts as a thermal insulator, slowing heat transfer, the TSM design incorporates an air pocket around the pipe for added insulation. Gaskets ensure secure mating for improved accuracy. The clamp mechanism is also specially designed to maintain proper contact.

An additional air pocket is included in the electrical connector, where the RTD traces are routed. The blue arrows indicate heat loss that can lead to false measurements, but the air pocket design effectively minimizes this, ensuring highly accurate RTD readings.

Convert the TSM's RTD signal to a standard output signal for easy integration

The TP temperature plug is a signal converter for temperature sensors and resistance thermometers. ifm's RTD series can be connected directly to the TP to convert resistance signals to IO-Link or analog outputs. 

The TP temperature plug significantly reduces wiring and installation complexity as compared to conventional head or DIN rail transmitters. Standardized M12 connections eliminate common error sources such as incorrectly connecting temperature sensors via cable clamps. The different devices' analog outputs are scaled for various factory settings to allow for a plug-and-work solution.