The SENKO SI-200E is a fixed (stationary) gas detector built for permanent installation in areas with a potential gas hazard — oil & gas facilities, chemical plants, confined industrial spaces, and process areas requiring continuous, unattended gas monitoring. It measures oxygen (O₂), toxic gases, and combustible gases in real time and displays both live concentration and self-diagnostic status on its built-in FND/LCD display.
Key Features
- Multi-gas detection — measures O₂, toxic gases (CO, SO₂, NH₃, etc.), and combustible gases with high-precision electrochemical, catalytic, or IR sensors depending on target gas.
- Dual communication modes — standard 4-20mA analog output plus RS-485 digital (Modbus) communication for easy integration with new or existing control systems; optional HART protocol.
- Bluetooth configuration — wireless setup, calibration, and diagnostics via mobile or PC without opening the enclosure.
- Explosion-proof housing — rugged aluminum alloy enclosure rated IP66, certified ATEX (II 2 GD Ex db IIC T6 Gb) and IECEx for use in classified hazardous areas.
- Self-diagnostics — continuous internal fault monitoring shown on-display alongside live gas concentration.
- Dual alarm + fault relay outputs — 1st alarm, 2nd alarm, and fault relay (2.0A @ 30VDC) for direct interlock/shutdown integration.
Applications
- Oil & gas production, storage, and processing facilities
- Chemical and petrochemical plants
- Confined industrial spaces and process areas
- Wastewater treatment and utility plants requiring continuous toxic/combustible gas monitoring
- Any fixed installation needing 24/7 unattended gas detection with control-room integration
Specifications
| Model | SI-200E |
| Measuring Type | Diffusion |
| Gas Types | Oxygen (O₂), toxic gases, combustible gases |
| Display | FND (4-digit), gas concentration, alarm, malfunction |
| Communication | 4-20mA analog, RS-485 Modbus, Bluetooth (wireless setup), HART (optional) |
| Relay Outputs | 1st alarm, 2nd alarm, fault (2.0A @ 30VDC) |
| Power Supply | +24V DC ±10% |
| Power Consumption | 3.6W @ +24VDC |
| Enclosure Material | Explosion-proof aluminum alloy |
| Ingress Protection | IP66 |
| Dimensions | 169(W) × 188.5(D) × 107(H) mm |
| Weight | 2.4 kg |
| Operating Temperature | -40°C to +60°C |
| Certification | ATEX II 2 GD Ex db IIC T6 Gb / Ex tb IIIC T80°C Db, IECEx, EMC, RoHS2 |
| Warranty | Device: 2 years · Sensor: 1 year |
What It Solves
Facilities with fixed gas hazard points need continuous, reliable monitoring that doesn’t depend on a worker carrying a portable unit. The SI-200E gives plant safety and control teams a permanently installed, explosion-proof detection point with both analog and digital outputs, so it drops into existing 4-20mA loops or Modbus-based control systems without re-engineering the plant’s monitoring architecture. Its self-diagnostic display reduces false-safe risk by surfacing internal faults immediately, and Bluetooth configuration cuts maintenance time by removing the need to open the explosion-proof housing for routine calibration and setup changes.
Request a quote for SI-200E pricing, sensor options, and installation guidance for your site.
