TTH300 (head-mounted) and TTF300 (field-mounted) transmitters offer user-friendly sensor calibration and backup redundancy for two platinum 100 Ω thermometers with three-wire connections. Inputs include resistance thermometers and thermocouples, resistance-type transmitters and millivolt voltage transmitters. Two inputs may include RTDs and thermocouples in combination. Output is a 4 to 20 mA signal incorporating Hart protocol communications fieldbus technology.

ABB, (215) 674-6580