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SITRANS TH320/420 is designed to support all common resistance thermometers and thermocouples. It also evaluates resistance and millivolt signals. Setup is quick and easy with the SIMATIC PDM or the Handheld Communicator.Both temperature transmitters SITRANS TH320 and TH420 combine perfect measurement and intelligence for every temperature and condition.The true reliability of the SITRANS TH420 is exemplified by the dual sensor input with 4-wire sensor connection and hot backup function. In case of a sensor failure, the transmitter seamlessly switches to the second sensor, so that the data is recorded continuously and without any loss.The sensor trim realized following the Callendar-Van-Dusen-Method as well as the additional function of the sensor drift detection (SITARNS TH420 only) allows a high accuracy, accelerated calibration time and optimized calibration planning.The SIL2/3 certificates in combination with a broad range of ex and marine approvals are the perfect solution for your safety-critical applications, also under harsh conditions up to -50°C.
User-friendly details give SITRANS TH320/420 its uniqueness: Without opening the 4-20mA loop, the output current can be read out directly with a multimeter. A red/green LED shows the technician the status at a glance.
Resistance thermometers, Thermocouples, Resistance-type sensors, DC sources
4 to 20mA (SITRANS TH320), HART (SITRANS TH320/420)
High availability during measurement
High reliability and long-term stability
Avoidance of production stop because of measurement failures
Best cost-benefit ratio for facility management
Cost reduction through anticipatory maintenance
High sensor accuracy
Extended temperature range up to -50°C + SIL2/3 approvals