What Is A Platinum Resistance Thermometer (PRT)? You are here: Home / What Is / What Is A Platinum Resistance Thermometer (PRT)? The meaning of PRT is Platinum Resistance Thermometer. The PRT probe is made from platinum that uses a resistance vs temperature relationship. It is a synonym for resistance thermometer.See definition: Resistance thermometerView Detailed Technical Information: Resistance Thermometer View Our PRT Sensors If you want to order a temperature sensor or you are unsure exactly what you need, get in touch and we can help you. Contact Us Share on facebook Share on twitter Share on linkedin