OEM Combustible Gas Leak Detector Manufacturers & Supplier

%VOL measures absolute volume concentration (100% VOL = pure gas). %LEL (Lower Explosive Limit) measures the minimum concentration of combustible gas in air capable of ignition (for Methane, 5.0% VOL = 100% LEL). ppm (parts per million) is used for trace leaks and toxic gas detection, where 10,000 ppm equals 1.0% VOL.

Under international safety codes, Low Alarm (A1) is typically set at 20% to 25% LEL to alert personnel and start mechanical ventilation. High Alarm (A2) is set at 40% to 50% LEL to immediately cut gas supplies via emergency shut-off valves, drop power to non-explosion-proof gear, and evacuate the space.

Valves like the JYFJS-011 use a mechanical latch-down design for safety. If power drops or gas drops below the alarm threshold, the valve remains closed. An authorized technician must physically inspect the facility, confirm the leak is resolved, and manually pull the reset lever before fuel can flow again.

A 4-20mA star configuration requires dedicated home-run cabling from each field head back to the rack, offering high noise immunity and point-to-point isolation. Digital M-BUS allows multi-drop wiring over a single 2-wire trunk line for power and telemetry, reducing copper costs and trenching requirements by up to 60% on large sites.

Catalytic pellistors lose sensitivity when exposed to vaporized silicones (lubricants, sealants), chlorinated hydrocarbons, sulfur compounds (H2S), and heavy metal complexes. These materials crack on the active catalytic surface, forming an impermeable glaze that blocks further oxidation. In areas with known poisons, NDIR optical sensing is recommended.

We support private label badging, custom enclosure colors, tailored modbus register maps, modified alarm setpoints to match national codes, custom packaging, localized manuals, and regional explosion-proof certifications (ATEX, IECEx, UL, CCC).