SITRANS TH320 — Siemens
Head-mounted transmitter for the form B connection head, HART-capable, galvanically isolated, approved up to SIL 2/3 and Ex ia.

The TH320 sits in the sensor's connection head and converts the sensor signal into 4…20 mA right there — the cable to the control cabinet then carries an interference-proof current signal instead of a sensitive thermoelectric voltage. One input, one galvanically isolated two-wire output, configuration via HART.
We supply it fitted and programmed to your measuring range, together with the sensor, connection head and thermowell — or separately as a spare part.
Technical data
| Installation | Form B connection head to DIN 43729 |
| Input | 1 × Pt100 to IEC 60751 in a 2-, 3- or 4-wire connection · thermocouple · resistance · voltage |
| Output | 4…20 mA, two-wire, galvanically isolated · HART |
| Functional safety | IEC 61508 SIL 2/3 |
| Explosion protection | ATEX / IECEx: II 1 G Ex ia IIC T6…T4 Ga · II 3 G Ex ec IIC T6…T4 Gc · II 1 D Ex ia IIIC · further approvals CSA, FM, NEPSI, Inmetro, UKEX |
| Accessories | 4-core silicone cable set for Pt100 (2 × red / 2 × white) |
Versions in our stock
| GHI article number | Version |
|---|---|
| HMU7NG03100BA00 | HART, SIL, Ex — Pt100 3-wire (7NG0310-0BA00-0NA0-Z) |
| HMU7NG03100CA00 | HART, SIL, Ex — Pt100 4-wire |
| HMU7NG03100BA01 | HART, SIL — without Ex (7NG0310-0BA00-0AA0-Z) |
| HMU7NG03100BA03 | HART — basic version (7NG0310-0BA00-0AA0) |
| HMU7NG03200JA00 | 4…20 mA, galvanically isolated, Pt100 and thermocouple |
Enquire about the SITRANS TH320
We configure and programme the transmitter to your measuring range — tell us the sensor, range and output. info@ghi-gmbh.de or +49 6181 504 93 18
Back to the overview Temperature transmitters · We carry out programming and calibration in our own laboratory .