IEC Industrial platinum resistance thermometers and platinum temperature sensors. The International Standard that specified Industrial PRT’s since has been IEC IEC Ed.2 introduces several significant technical changes with . Buy IEC Ed. Industrial platinum resistance thermometer sensors from SAI Global. STANDARDS. SUBSCRIPTIONS. Content Management Software.

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This would be displayed as follows standarx is an example only Calibration Temperature Thermometer Reading Hi Santhu, It is just a case of accuracy. It is more practical to look the application.

This one is nice and simple, but often misunderstood. It is important to understand that just like K-Type thermometers there are 3 main areas of uncertainty when using Pt thermometers.

IEC revises standard on thermometers and sensors

Lubricant Storage and Handling. Specific changes in the new edition include: Specific changes in the new edition include:. The Best Gets Better: But as the temperature increases, so does the permissible deviation due to the variations possible in the TC.

This is irc unrealistic for a well-made RTD, although it requires special selection of the sensing element at this temperature.

Learn how your comment data is processed. The uncertainty of measurement for the thermometer is.

How to Integrate Demand-driven Planning with Maintenance. Standxrd table below shows the tolerances of each Class of probe at various temperatures. Because a well manufactured RTD will have high repeatability relative to the applicationClass B accuracy is generally sufficient unless there is a need for better interchangeability; or when measuring change of temperature; or if you know that you have special accuracy requirements.


Platinum resistance thermometers are among the most accurate temperature sensors, and are relatively immune to electrical noise, making them particularly well suited for industrial environments. There are four primary temperature scales in use today. So which is right? The International Electrotechnical Commission IEC has published the second edition of its standard on industrial platinum resistance thermometers and platinum temperature sensors.

Not only does this informs the user of any adjustments to be made to the reading at the desired temperature.

Pt Accuracy and Probe Classification – ATP Instrumentation Ltd

But remember, when specifying a Class A RTD, you must always include the working range at which it must perform to this accuracy. These are IEC designations of accuracy. Subscribe Today Reliable Plant Newsletters. Build Processes That Drive Consistency.

RTD Sensor Accuracy and Tolerance Standards

As we discussed earlier, you may not actually need the accuracy at this point, but rather the repeatability. The specification was poorly written. Then you need to spell out dtandard requirements for the applications engineer. Live Temperature Sensor Support. This is where thing start to get a little iev complex. Let’s take the freezing point of water in Celsius for example.


Toggle navigation Toggle search. Your Pt Thermometer is tested against a known reference standard and a certificate of calibration is produced.

If you need to know only, “Is it hot or is it not? The minimum and maximum temperatures of the stated working range are conve-nient points to chose and will ensure Class A accuracy, but will at the same time tend to drive up the iwc of the sensor. To ensure this control, the single ice point calibration acceptable for Class B sensors will not suffice.

The uncertainty of the unit The uncertainty of the lec Uncertainty of any calibration procedure So lets break it down.

Keep in mind that this special selection will generally result in a longer delivery time and higher price tag on the RTD. The standard also defines the relationship between temperature and the electrical resistance of the thermometer, allowing for the replacement of sensors independent of their manufacturers.

Conversely, not all applications require even Class B accuracy. The class of the probe dictates how much the probe can drift away from this curve.

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