Tel-Tru Manufacturing Company builds industrial quality temperature instruments that improve our customers’ product quality a ... nd operational performance. Founded in 1916, the company manufactures and distributes Bimetal Thermometers, Digital Thermometers, Temperature and Pressure Transmitters, Pressure Gauges and Accessory products that sense and monitor temperature and pressure for sanitary, industrial, OEM, HVAC, and food service applications and equipment worldwide. read more