Temperature Probes

Temperature probes are used to take measurements of air, liquid or surface temperatures. They are available in various forms including thermocouple, thermistor and PT100 sensors to complement digital thermometers and temperature data logging instrumentation. The internal sensor of the probe produces a voltage that varies with temperature, this voltage is then read by the connect instrumentation to give a measurement. Temperature probes feature varying lengths of cables and in most cases a plug to offer quick and easy installation. Often constructed from stainless steel, temperature probes are heavy duty making them suitable for providing highly accurate and reliable measurements in harsh environments in industrial or commercial settings. You can find out more in our temperature probes guide. At RS we stock a wide range of high-quality Temperature Probes, Sensors, and Temperature Probe Accessories from leading brands like Fluke, Testo, Digitron and RS PRO. We also offer Calibrated Temperature Probes which are calibrated to RSCAL, SYSCAL or UKAS standards.

Check out our temperature converter calculator to accurately calculate the temperature in different units of measurement.

What are the types of Temperature Probes

Resistive Temperature Detectors (RTD) - An RTD is also known as a resistive temperature detectors, these are highly precise temperature probes that are constructed by highly conductive metals, such as platinum, copper or nickel. Offering a wide range of temperatures, however longevity can be an issue, so will need replacing often.
Negative Temperature Coefficient (NTC) thermistor - Temperature thermistors reflect changes in temperature quickly and to a very high accuracy. Often lower in cost, but offer a smaller temperature range.
Thermocouples - Thermocouples are the most commonly used temperature probe, this is because of the simplicity, speed of response to the change in temperature. Thermocouples are less stable over time and will need replacing more often. There are many types of thermocouples, all made from different materials which allow for various temperatures. The most common is a Type K thermocouple, which has a temperature range of -180 to 1300 degrees Celsius.
Surface temperature probes are specialised sensors designed to measure the temperature of an object's surface. Unlike immersion or internal probes, these devices are used for non-invasive temperature readings, making them ideal for monitoring the external temperature of solid materials, pipes, machinery, or other surfaces.

Typical Applications for Temperature Probes

Temperature probes are known for their robust design meaning they are ideal for many general-purpose industrial, commercial and scientific applications where accurate temperature measurement and monitoring are key. They are also essential in ensuring equipment is functioning correctly or accurately measuring during testing and investigations. These sensor probes are often used in the following areas: