Technical FAQs about industrial PT100 probes
Industrial PT100 probes are used in processes where measurement accuracy, stability, and repeatability are critical. Unlike standard solutions, an industrial PT100 must be designed considering the actual process, operating temperature, mechanical environment, and installation. At Jemar Thermometry, we manufacture custom PT100 probes, tailored to each industrial application to guarantee reliable readings and a long sensor lifespan.
What is an industrial PT100 probe?
An industrial PT100 probe is a temperature sensor based on a platinum resistance of 100 ohms at 0 °C, designed for use in demanding industrial environments. It stands out for its high accuracy and stability compared to other measurement systems. Unlike a standard PT100, an industrial probe is manufactured with specific characteristics, including the sheath, diameter, length, cable type, and mounting system. At Jemar, we manufacture custom industrial PT100s for applications where reliability is paramount.
What is the difference between a 2, 3, and 4-wire PT100?
The difference between 2-wire, 3-wire, and 4-wire PT100 sensors lies in their measurement accuracy and cable resistance compensation. The 2-wire PT100 is the simplest but least accurate over long cable lengths. The 3-wire PT100 is the most widely used in industry because it partially compensates for cable resistance. The 4-wire PT100 offers the highest accuracy and is used in critical processes or industrial laboratories.
When is it better to use a PT100 instead of a thermocouple?
A PT100 probe is preferable when high accuracy, long-term stability, and moderate temperature ranges are required, generally up to 400–600 °C depending on the design. Thermocouples, on the other hand, are used at higher temperatures. In industrial processes where small temperature variations affect product quality, the PT100 is the most suitable option. At Jemar, we advise our clients on selecting the correct sensor based on their process and temperature range.
What is the accuracy of an industrial PT100 probe?
The accuracy of an industrial PT100 depends on the sensor class and probe design. PT100s can be manufactured to different tolerance classes, allowing them to be adapted to processes with varying accuracy requirements. Furthermore, factors such as cable length, connection type, and sheath directly influence the final result. Therefore, a well-designed and custom-manufactured PT100 offers significantly more reliable measurement than a standard solution.
Why do some PT100 probes fail in industry?
The most common failures in industrial PT100 probes are due to vibrations, humidity, incorrect sheath or cable selection, or improper installation. Many standard PT100 probes are not designed for real industrial environments. At Jemar, we design each probe taking into account the mechanical and thermal conditions of the process, reducing premature failures and reading deviations.
Which sheath is suitable for an industrial PT100 probe?
The selection of the sheath is key to the reliability of a PT100 probe. Stainless steel sheaths are used in most industrial processes, while special materials are employed in aggressive or high-temperature environments. The diameter and length of the sheath influence response time and mechanical strength. At Jemar, we analyze each application to manufacture the PT100 probe with the most suitable sheath from the outset.
Is a standard PT100 probe better, or a custom-made one?
In demanding industrial applications, a custom-made PT100 probe offers superior performance compared to a standard model. It allows for customization of length, diameter, cable type, mounting system, and protection rating to the specific process. This translates into greater measurement stability, fewer downtimes, and a longer sensor lifespan. At Jemar Thermometry, we manufacture PT100 probes tailored to each client and application.
What information is needed to manufacture a custom PT100 probe?
To manufacture a custom PT100 probe, it is necessary to know the operating temperature, the process environment, the immersion length, the diameter, the connection type, the cable, and the mounting system. With this information, at Jemar we design the appropriate probe to guarantee accuracy, reliability, and durability under real industrial conditions.
Every industrial process requires a specific solution. At Jemar Thermometry, we manufacture custom-made industrial PT100 probes for demanding applications.
