STS PTM Programmable Pressure Transmitter
Programmable pressure transmitter for 100 mbar to 1,000 bar, 4–20 mA; factory/manufacturer configuration for selectable nominal range and ±0.25% or ±0.10% FS accuracy options. Ordinary PTM is not equivalent to the separately certified PTM/Ex family.
Original manufacturer model documentation
PTM official product page and downloadable datasheets.
Order-code and hazardous-area check: Exact pressure span, materials, connector and electrical output depend on the ordered version. Do not treat standard and /Ex model suffixes or certification annexes as interchangeable.
PTM — programmable pressure instrumentation
Configurable range versus installed range: The family covers many nominal spans, and programmable 4–20 mA scaling must be documented for the particular installed transmitter. Determine lower/upper range values, engineering units and controller alarm thresholds as part of commissioning; the whole 100 mbar–1,000 bar manufacturer range is not the span of one instrument.
Electrical and pressure boundary: Check two-wire loop supply and burden where relevant, compatible process fitting, material, overload exposure and required accuracy at the target span. The listed 0.25%/0.10% FS options should be matched to the chosen sensor and factory calibration.
Certification: PTM/Ex is a separate order family. Do not transfer its hazardous-area approvals to a standard PTM, even when the housing looks similar.
PTM — programmable span and thermal limits
| Selection point | Model-specific evidence |
|---|---|
| Nominal cell families | 100 mbar–1000 bar; these are different ordered ranges. |
| Adjustment | Maker specifies 1:4 nominal-range adjustment, within −5% to +105%. |
| Static accuracy | ≤±0.25% or ±0.10% FS. |
| Temperature | Electronics −25…85°C; process −40…150°C. |
| Signal/materials | 4–20 mA; stainless steel or titanium. |
Record both the physical cell range and programmed 4 mA/20 mA endpoints. A quarter-span setting increases the relative effect of a fixed absolute error; do not assume original full-scale accuracy becomes the same percentage of the reduced span. Verify receiver scaling after programming and keep pressure overload limits tied to the hardware, not the displayed range.
STS model documentation. Technical source review: 26 October 2026.