iTHERM ModuLine TM101 & TM121 Thermometers Endress+Hauser iTHERM ModuLine TM101 and TM121 Thermometers offer reliable measurements and a user-friendly design with a -50°C to +650°C measuring range and up to 50bar (725psi) pressure range. These thermometers are designed for use in non-hazardous areas, providing a universal range of application use and up to an IP68 degree of protection. The devices are available with optional BLUETOOTH®-enabled head transmitters with 4mA to 20mA output or HART® communication, delivering enhanced measurement accuracy and reliability compared to directly wired sensors. Endress+Hauser iTHERM ModuLine TM101 and TM121 Thermometers feature a wide range of process connections, such as threads, cap nuts, and compression fittings.