PT100 Sensor | Waterproof 3-Wire RTD | Platinum Resistance Probe

This waterproof PT100 sensor gives you steady temperature information for tough industrial uses. It has a sealed stainless steel probe and a flexible silicone cable. This makes it a good choice for checking temperatures in liquids or wet places like HVAC setups and factories. Features and Benefits - 304 Stainless Steel Probe - It resists rust and damage when you use it in different liquids and chemicals. - Internal Epoxy Potting - This fully seals the platinum part inside, making it a truly waterproof RTD sensor. - Class A Tolerance - This accurate PT100 sensor reads within ±(0.15 + 0.002|t|)°C. - Flexible Silicone Cable - It stays bendable in temperatures from -60°C to 200°C. This helps with installation. Applications - Checking liquid temperatures in factory vats and tanks. - Measuring air temperature inside commercial HVAC ducts. - Keeping track of process temperatures in food and drink making. Safety & Preparation Before working with any temperature sensor, including this PT100 Sensor, always ensure power to the system is disconnected. This high precision sensor is designed for accurate temperature measurement, and proper handling prevents damage to the probe and ensures reliable readings. Use appropriate personal protective equipment. When installing or testing, be mindful of the waterproof nature of the probe. Always consult the specific instructions for your controller or data logger before connecting, to ensure correct wiring and avoid electrical shorts. Identify standard RTD Values An RTD (Resistance Temperature Detector) is a type of temperature sensor that measures temperature by correlating resistance with temperature. This product is a PT100 Sensor, meaning it has a nominal resistance of 100 ohms at 0°C. Other common RTD values include PT1000, which has a nominal resistance of 1000 ohms at 0°C. Understanding these base resistance values is crucial for accurately interpreting readings from your controller and verifying sensor functionality. The Platinum Resistance Detector material contributes to its high precision. How to Test by Wire Configuration To check an RTD sensor, you will primarily be measuring resistance. A multimeter is the essential tool for this. Given that this product is a Temperature Sensor with a 3-Wire configuration, the testing method differs from 2-wire setups. Always ensure the sensor is at a known temperature when testing, ideally 0°C for a PT100 to verify its 100-ohm resistance. This allows you to confirm the sensor's basic functionality before integration with a controller. A. 2-Wire RTD While this PT100 Sensor has a 3-Wire configuration, understanding 2-wire RTDs is useful for comparison. A 2-wire RTD connects directly to the controller with two wires. To test, simply measure the resistance across these two wires. This reading will include the resistance of the lead wires themselves, which can introduce inaccuracies, especially over longer distances. For a PT100, you would expect approximately 100 ohms at 0°C, plus lead wire resistance. B. 3-Wire RTD (Most Common) This PT100 Sensor is a 3-Wire RTD, which is a common configuration designed to compensate for lead wire resistance. It uses two wires for the resistance measurement and a third wire to measure the resistance of one of the lead wires. To test, connect your multimeter to the two wires that form the primary resistance loop. Then, measure the resistance between one of those wires and the third wire. The resistance between the two measurement wires should be approximately 100 ohms at 0°C, and the resistance between the measurement wire and the compensation wire should be significantly lower and roughly equal to each other, indicating lead wire resistance.