Bb sensors sheath resistance thermometers with 4 wire connection m12 bb sensors mante pt1000 this resistance thermometer is embedded in a sleeved and jacketed assembly to give a sensor that combines the accuracy of a resistance thermometer with the benefits of a jacketed thermocouple the optimised design strikes the best balance between accuracy and a robust protected construction the sensor has a 4 wire connection that increases measurement accuracy the fast response and high accuracy