SITRANS TR320 / TR420
Rail transmitters that combine precise measurement and intelligence under all conditions.
Siemens SITRANS TR320 / TR420
Product Summary
SITRANS TR320 and TR420 rail transmitters combine perfect measurement and intelligence under all conditions.
Reliability is guaranteed, for example, by the TR420's 2-fold sensor input including 4-wire sensor connection and hot backup: in the event 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, stable temperature measurement for critical processes
High Availability with Hot Backup
The hot backup function (SITRANS TR420) keeps measurement running when a sensor fails, helping avoid production stops caused by measurement failures.
Long-Term Stability & Accuracy
Sensor trim (Callendar-van-Dusen) and sensor drift detection (SITRANS TR420 only) deliver high accuracy, accelerated calibration time, and cost reduction through 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 |
|
| Output | 4 to 20 mA (SITRANS TR320), HART (TR320/TR420) |
| Operational Temperature |
|
| Approvals | ATEX, IECEx, FM, CSA, EACEx, NEPSI, Inmetro |
| Certificates | SIL 2/3 |
Download Siemens SITRANS TR320 / TR420 Catalog
Get detailed ordering datasheets, dimension diagrams, and full engineering technical guidelines.