STS PTM/N/Ex Programmable Level Transmitter
Programmable submerged level measurement with ATEX/IECEx options.
Original manufacturer: STS Sensoren Transmitter Systeme
Official Model Catalog
STS manufacturer technical data and certification downloads →
Check active product revision, measurement range, installation and certificates for the exact order code.
Ex / Hazardous-Area Document Check
Certificate source for PTM/N/Ex: STS provides model-family ATEX documents and an IECEx certificate labelled PTM_Ex and PTM_N_Ex. Certificate schedule, barrier/circuit parameters and cable selection govern the approved configuration.
Direct original model and approval: STS PTM/N/Ex datasheet and approval documents → · IECEx certificate SEV 19.0024X (PTM/Ex and PTM/N/Ex) →. For a submersible device, verify the certificate’s cable capacitance/inductance and temperature limits for the exact assembly.
IECEx certificate schedule — PTM/N/Ex
Certificate: IECEx SEV 19.0024X (STS PTM/N/Ex), intrinsically safe Ex ia design. The certificate annex specifies T6 Ta −5…+50°C and T4 Ta −5…+80°C, with medium temperature subject to the same respective limits. Ui 30 V; Ii 140 mA; Pi 0.9 W; Ci 14 nF and Li 1.3 mH plus cable contribution. Manufacturer datasheet specifies FEP cable above +50°C. Check the exact assembly: its cable, intrinsically safe interface, protection group and valid temperature class must match the ordered marking.
Original manufacturer PTM/N/Ex datasheet and full order-code options →
STS exact IECEx schedule cross-check — 22 October 2026
Model-specific certificate: IECEx SEV 19.0024X (issue 1, 23 September 2020) — official STS manufacturer-hosted IECEx certificate.
The official IECEx certificate explicitly covers STS PTM/N/Ex and PTM/Ex. It does not cover STS PTM.MT/N/Ex, which is certified separately. Inspect the selected order code, approval annex and intrinsic-safety barrier before choosing a hazardous-area device.
STS PTM/N/Ex — submersible level with programmable current output
| Model / specification | Official maker data | Implementation boundary |
|---|---|---|
| Hydrostatic level ranges | STS current family lists 1–250 mH₂O and -5…+80°C operating/process | Choose as metres water equivalent at the stated reference density and compensate other liquids. |
| Accuracy alternatives | ≤±0.25 / 0.10% FS on manufacturer listing | The 0.1% FS option is not universal across every configured measuring span. |
| Signal and adjustment | Two-wire 4–20mA, PC/software zero and span; 1:4 range adjustment within -5…+105% nominal | Do not assume RS485 bus telemetry. The programming interface is configuration, while the live process output remains current loop. |
| Materials and corrosion | Stainless steel or titanium wetted components | Cable and O-ring material compatibility can dominate seawater, diesel or chemical storage service. |
| Ex conformity | STS provides distinct ATEX and IECEx PTM series documents, plus DNV and other certificates | Certification scope belongs to exact manufactured assembly, with installed intrinsic-safety loop/barrier and permitted cable properties checked. |
Source and final unit approvals
Existing page’s image is explicitly a related PTM.MT/N/Ex, not the actual PTM/N/Ex model. Keep the visual disclaimer; require exact image, nameplate and certificate schedule before final product acceptance.
STS original model: STS PTM/N/Ex Programmable Level Transmitter. For any certified model, inspect the certificate schedule rather than extending family claims to other variants.