Working With PT100 Temperature Sensors

Really correct and steady temperature measurement can be done that has a PT100 temperature sensor between -200 and +850°C, which makes it a preferred alternative in lots of industrial purposes. Specifically, the large degree of accuracy throughout the -50 to a hundred and fiftyºC variety signifies that it is the preferred option for temperature measurement in Pharmaceutical purposes, including in sterilisation procedures.

The subsequent recommendations may help resistance temperature detector users to specify the correct configuration.

They are composed with Pharmaceutical and Health care purposes in mind Even though the principles use throughout all business sectors.

What’s a PT100 Temperature Sensor?

The PT100 sensor is a well-liked illustration of a resistance temperature detector (RTD). It is predicated to the principle noticed in metals whereby a modify in temperature will lead to a transform from the resistance of the fabric. Platinum exibits a favourable temperature coefficient I.e it shows an ever-increasing resistance with escalating temperature, and so is the most typical content used to construct RTD’s.

The PT100 sensor is built to Use a resistance of exactly 100Ω at 0.0°C, as well as a resistance maximize of 0.385Ω for each one°C increase amongst 0 and a hundred°C Based on ISO 60751: 2008

PT100 sensors are generally made applying two solutions:

Wire wound sensors

Platinum wire wound sensors consist of a thin platinum wire loosely wrapped about, or threaded in just, a ceramic core.

Wire wound sensors may be used above a wide array of temperatures, however they may be susceptible to mechanical shock, which induces measurement drift.

Slim Movie Sensors

Skinny movie sensors are based on a ceramic substrate which has a deposition of superior purity platinum, laser etched to give 100Ω at 0.0°C. That is then sealed within a glass adhesive.

These sensors are less costly than wire wound detectors, and so are considerably less delicate to affect hurt. Having said that they function inside a smaller temperature range than wire wound sensors.

PT100 sensors are commercially available to several diverse tolerance amounts, according to BS EN 60751:2008, as class B, A and AA to be able of raising precision. Furthermore 1/10 DIN sensors are available which can be picked to make certain a tolerance band 1/tenth that of a category B detector.

Picking the Right PT100 Detector

It is a equilibrium between competing variables. One example is, picking a PT100 sensor to be used in the pharmaceutical autoclave chamber, It is just a stability involving the optimum tolerance with the temperature measurement and also the resilience on the sensor to Recurrent handling by system operators.

So a class A skinny movie sensor would be most suitable for pharmaceutical applications, While a class B can have ample tolerance for some chemical or manufacturing programs. Greatest company temperature may additionally dictate a ceramic detector in preference to a thin film sensor.