SITRANS TH320 / TH420
Perfect measurement and intelligence at any temperature and condition.
Siemens SITRANS TH320 / TH420
Product Summary
SITRANS TH320 and TH420 combine perfect measurement and intelligence at any temperature and condition.
Real reliability is guaranteed, for example, by the dual sensor input of the TH420 incl. 4-wire sensor connection and hot backup function. In case of a sensor failure, the transmitter automatically switches to the second sensor, and the values continue to be recorded seamlessly and without loss.
Key Benefits
Reliable temperature measurement for continuous and safety-critical processes
High Availability
Hot backup function (SITRANS TH420) keeps measurement running and helps avoid production stops caused by measurement failures.
Long-Term Stability
Sensor trim (Callendar-van-Dusen) and sensor drift detection (SITRANS TH420 only) for high accuracy, accelerated calibration time, and anticipatory maintenance.
Built for Safety-Critical Environments
Extended temperature range down to -50 °C and SIL 2/3 approvals, with the best cost-benefit ratio for facility management.
Technical Specifications
Comprehensive parameters and system integration options
| Parameter | Technical Specification |
|---|---|
| Input | Resistance thermometers, thermocouples, resistance-type sensors, DC source |
| Output | 4–20 mA (SITRANS TH320), HART (TH320/TH420) |
| Operational Temperature |
|
| Approvals | ATEX, IECEx, FM, CSA, EACEx, NEPSI, Inmetro |
| Certificates | SIL 2/3 |
Download Siemens SITRANS TH320 / TH420 Catalog
Get detailed ordering datasheets, dimension diagrams, and full engineering technical guidelines.