IECEx Acetylene Gas Detector – PX2-X-X-P3405-A | PolyXeta II
The PX2-X-X-P3405-A PolyXeta II is an IECEx certified acetylene gas detector designed for continuous monitoring of flammable C₂H₂ gases and vapours in hazardous areas (Zone 1 & 2). This microprocessor-based gas transmitter features a 4–20 mA analog output signal and uses a catalytic sensor (pellistor) to detect acetylene concentrations in the lower explosion limit (0–100% LEL).
Ideal for industrial applications including oil & gas, petrochemical plants, power generation, and mining, this transmitter ensures dependable performance and high safety standards in explosive atmospheres.
Key Features:
- 4–20 mA analog signal output (standard)
- Sealed design – safe to open in Zone 1 without power shutdown
- IECEx certified by MSR Electronic
- SIL 2 certified for RS485 / 4–20 mA / Relay safety functions
- ATEX certified (MSR Electronic & Sensitron)
- Real-time continuous gas monitoring
- 12-bit resolution microprocessor
- Built-in self-diagnostic functionality
- Easy calibration – housing can be opened safely in Zone 1
- Reverse polarity and overload protection
- Approved for hazardous Zone 1 and Zone 2 installations
Optional Accessories:
- LCD Display
- Relay Set with LCD
- Relay Set (without display)
System Integration:
The PX2 is built with a standard 4–20 mA output and is fully compatible with PolyGard series controllers such as the MGC/DGC, as well as any other standard electronic control or building automation system.
Need Help?
Need assistance selecting the right gas detection solution for your site? Contact our team for expert support and tailored recommendations.


