Executive Summary & Core Capabilities
The Dräger Polytron Stationary Gas Detector System is a field-proven stationary gas alarm engineered to monitor toxic gas concentration shifts and ambient oxygen levels in high-risk industrial plant environments. Housed in a heavy-duty copper-free aluminum or 316 stainless steel explosion-proof enclosure, the unit protects personnel against dangerous toxic gas exposure or asphyxiation hazards near valves, pumps, storage vaults, and chemical reaction cells.
At the center of the transmitter is Dräger's proprietary electrochemical DrägerSensor® technology. These pre-calibrated smart sensors carry internal EEPROM memory storing span calibration data, temperature matrix parameters, and gas response curves. This feature allows operators to swap pre-calibrated sensor heads directly in hazardous locations with zero field downtime.
- Pre-Calibrated Smart Sensors: Sensors can be calibrated off-site in a laboratory and plugged into field units without requiring re-zeroing or complex field adjustments.
- Instant Toxic & Oxygen Alerts: Rapid-response electrochemical cells trigger warning relays within seconds of , , or deviations.
- Rugged All-Weather Housing: Built with IP66/IP67 weatherproofing and chemical coatings to resist harsh marine salt spray, high humidity, and extreme industrial temperatures.
- SIL 2 Functional Safety: Compliant with IEC 61508 safety standards for integration into automated Safety Instrumented Systems (SIS).
Operates on a 3-electrode potentiostatic sensor mechanism where target gases (, ) diffuse through a liquid-tight membrane and undergo oxidation or reduction at the working electrode.
This chemical reaction generates a micro-ampere current directly proportional to ambient gas concentration. Integrated temperature sensors dynamically correct outputs using internal polynomial algorithms, ensuring zero-point stability across temperature swings from -40 °C to +65 °C.
Technical Specifications & Performance Matrix
| Metrology Parameter | Engineering Specification |
|---|---|
| Sensing Technique | Plug-and-Play Electrochemical DrägerSensor® |
| Hydrogen Sulfide () Range | (configurable) |
| Carbon Monoxide () Range | (configurable) |
| Oxygen () Range | (depletion & enrichment) |
| Response Time () | (), () |
| Long-Term Drift |
| Interface Component | Technical Profile |
|---|---|
| Analog Signaling | (2-wire or 3-wire operation) |
| Digital Fieldbus Options | HART 7, Modbus RTU RS485, Profibus PA |
| Internal Relays (Optional) | 2 Alarm Relays, 1 Fault Relay (SPDT rated 5A @ 230 VAC) |
| Operating Voltage | ( nominal) |
| Display Screen | Backlit graphical LCD screen with plain text pictograms |
| Compliance Metric | Specification |
|---|---|
| Housing Metallurgy | Epoxy-coated Copper-Free Aluminum or 316 Stainless Steel |
| Ingress Rating | IP66 / IP67 / NEMA 4X |
| Operating Temperature | () |
| Functional Safety | IEC 61508 SIL 2 certified |
| Explosion-Proof Approvals | ATEX / IECEx: Ex db IIC T6/T4 Gb; CSA Class 1 Div 1 |
Target Industry Applications
H2S & Toxic Gas Monitoring
Continuously tracks hazardous hydrogen sulfide leaks in oil refineries, wastewater sumps, and offshore desulfurization units.
Oxygen Depletion & CO Safety
Monitors ambient air quality inside gas storage rooms, utility tunnels, and chemical plants to prevent asphyxiation and poisoning hazards.
Official Provider Resources & In-Depth Documentation
For complete technical handbooks, safety system integration guides, and direct support from Dräger's engineering team, explore the official manufacturer portals below:
