Product Description
SC311S‑100‑ASSY is a complete infrared combustible gas sensor assembly of Emerson Net Safety Millennium‑II series. The suffix “S” stands for 316 stainless‑steel explosion‑proof housing. It is fully compatible with M21, M22, M2B gas transmitters. Adopting dual‑beam infrared optical principle for hydrocarbon‑based combustible gas measurement with measuring range 0‑100%LEL. Built‑in automatic temperature, pressure and humidity compensation, with self‑diagnosis and fail‑safe function. Poison‑resistant and low‑frequency calibration requirement. Used for combustible gas leak monitoring in hazardous classified areas. Supplied as full assembly for field‑replacement of sensor probe unit, widely deployed in oil‑gas and chemical hazardous‑location applications。
Suffix explanation: S=316 stainless‑steel housing; 100=0‑100%LEL measuring range; ASSY=complete sensor assembly including housing, optical sensor and sealing components.
Technical Parameters
| Item | Specification |
|---|---|
| Model | SC311S‑100‑ASSY |
| Manufacturer | EMERSON Net Safety |
| Product Type | Infrared Combustible Gas Sensor Assembly |
| Compatible Transmitter | Millennium II M21, M22, M2B |
| Target Gas | Hydrocarbon combustible gases (Methane, Propane, Butane etc.) |
| Measuring Range | 0‑100% LEL |
| Detection Principle | Dual‑beam Infrared (IR) |
| Housing Material | 316 Stainless Steel (S version) |
| Alternative Housing | SC311A‑100‑ASSY: Aluminum housing version |
| Certification | Ex‑certified for hazardous locations |
| Compensation | Auto temperature, pressure & humidity compensation |
| Features | Catalyst poison resistant, built‑in self‑diagnosis, fail‑safe mode |
| Response Time | T90＜8 seconds |
| Operating Temperature | ‑40℃ ~ +75℃ |
| Ingress Protection | IP66 |
| Status | Active industrial spare part, OEM available for order |
| Scope of supply | Sensor probe, explosion‑proof housing, sealing assembly |
Product Application
- Gas leak detection for hazardous areas: Hydrocarbon gas leak monitoring on offshore platforms, refineries and chemical plants.
- Transmitter sensor spare‑part replacement: Full‑unit replacement for aged / faulty sensor fitted on M21 / M22 / M2B transmitters.
- Oil & gas site monitoring: Safety monitoring for compressor stations, pipeline valve rooms and tank farm areas.
- Plant safety interlock system: Gas detection signal feeds into DCS / PLC for high‑level alarm and safety interlock.
- Harsh corrosive environment: 316 stainless‑steel housing suitable for coastal, salt‑spray and corrosive‑atmosphere sites.
Related Series Part Numbers
- SC311A‑100‑ASSY 0‑100%LEL combustible gas assembly, aluminum housing
- SC310S‑100‑ASSY 316SS housing, 0‑100%LEL basic IR gas sensor assembly
- SC310A‑100‑ASSY Basic IR combustible sensor with aluminum housing
- M21‑AH‑S Millennium‑II single‑channel transmitter, stainless‑steel housing
- M2B‑AH‑S Millennium‑II dual‑channel transmitter, stainless‑steel housing
There are no reviews yet.