PT100 RTD Sensor with M6 Bolt | 3-Wire Cable | For Boiler & Oven

This PT100 sensor provides temperature data from your equipment. It's an RTD sensor with an M6 screw head. You mount it directly into a threaded hole. The 3-wire PT100 design helps make sure your readings from a boiler or oven are consistent and accurate. Features and Benefits - M6 bolt-on PT100 sensor head - It installs into a threaded port for direct, reliable thermal contact. - Class A platinum element - This gives accurate measurements, often more stable than thermocouples in its range. - Stainless steel sheath - It protects the internal PT100 RTD sensor from moisture and physical wear. - Multiple cable lengths available - You can order the right length for your machine without cutting or splicing wires. Applications - Monitoring process temperatures in boilers, heat exchangers, and industrial ovens. - Measuring the temperature of machinery blocks, bearings, and metal plates. - Integrating with PID controllers for automated temperature regulation systems. Safety & Preparation Always ensure the equipment you are working on, such as a boiler or oven temperature controller, is fully powered down and isolated before attempting to install or test any sensor. Working with live electrical systems can be hazardous. When handling the RTD temperature sensor, avoid bending the M6 bolt or the cable sharply, as this can damage the internal wiring and affect the precision of the sensor. For boiler and oven applications, ensure the mounting thread is clean and free from debris to achieve proper thermal contact and accurate temperature readings. Identify standard RTD Values An RTD (Resistance Temperature Detector) sensor, like this PT100 type, works by changing its electrical resistance in proportion to temperature. At 0°C, a PT100 sensor will have a resistance of 100 ohms. This is a standard value used for calibration and checking sensor functionality. As the temperature increases, so does the resistance. While this specific product is a PT100 sensor, other common RTD types include PT500 and PT1000, which have resistances of 500 ohms and 1000 ohms respectively at 0°C. Knowing the sensor type is crucial for accurate temperature control. How to Test by Wire Configuration To check the functionality of an RTD temperature sensor, you will need a multimeter capable of measuring resistance. The method for testing varies depending on the wiring configuration. This product is a 3-wire RTD cable, which is common for applications requiring higher accuracy, such as boiler and oven temperature controllers. The additional wire in a 3-wire system helps to compensate for the resistance of the lead wires themselves, providing a more precise temperature reading to the controller. A. 2-Wire RTD A 2-wire RTD sensor is the simplest configuration, using two wires to connect the sensor to the controller. To test a 2-wire RTD, connect the multimeter leads to each of the two wires. At room temperature (approximately 20°C), a PT100 sensor should show a resistance reading of around 107.7 ohms. The main drawback of a 2-wire RTD is that the resistance of the lead wires themselves is added to the sensor's resistance, which can introduce inaccuracies, especially over longer cable runs. This configuration is generally suitable for applications where high precision is not critical. B. 3-Wire RTD (Most Common) This product features a 3-wire RTD cable, which is the most common configuration for achieving accurate temperature measurement, particularly for boiler and oven temperature controllers. In a 3-wire RTD, two wires are connected to one end of the RTD element, and the third wire is connected to the other end. To test, identify the two wires that are identical in colour (these are typically the lead wires for resistance compensation) and one different coloured wire (this is usually the signal wire). Measure the resistance between the two identical coloured wires; this should be very close to 0 ohms. Then, measure the resistance between one of the identical wires and the different coloured wire. This reading should correspond to the sensor's resistance at the ambient temperature (e.g., approximately 107.7 ohms for a PT100 at 20°C). The 3-wire configuration effectively cancels out the resistance of the lead wires, ensuring a more precise sensor reading.