High-Quality Ozon Detector Manufacturers & Factory

Lower Explosive Limit (%LEL) applies strictly to combustible gases (such as methane, propane, and butane) and measures the volume concentration percentage required to sustain combustion in air (100% LEL for methane is ~5.0% Volume). Alarm thresholds are typically set conservative at 25% LEL. Conversely, toxic gas and oxidizer detectors (such as Ozone, CO, and H2S) measure lethal or occupational health thresholds in parts-per-million (ppm) or ppb, requiring highly sensitive electrochemical or photoionization detection cells rather than catalytic beads.

Placement is determined strictly by the relative molecular density of the target gas compared to ambient air (Air = 1.0). Methane is lighter (density ~0.55), requiring detectors to be mounted near the ceiling (within 30cm of the ceiling and within 1.5m of the source). Ozone ($O_3$, density ~1.65) and LPG are heavier than air; sensors must be installed low to the ground (typically 30cm to 60cm above the floor) in stagnant accumulation areas, positioned away from turbulent drafts or extractor fans.

Yes. Shield household series (SD6200, SD6103K) and stand-alone commercial detectors (SD2130) feature direct-drive pulse/relay outputs engineered to trip the JYFJS-011 aluminum alloy emergency shut-off valve within 1 second of reaching danger setpoints. Crucially, the valve features a manual pull-up reset design, guaranteeing that the pipeline remains isolated and gas cannot flow back automatically until operators physically inspect the premises.

For individual standalone facilities like commercial restaurant kitchens, residential boiler rooms, or decentralized retail units, stand-alone detectors (e.g., SD2130) are most cost-effective as they host internal visual-audible alarms and direct valve relays without requiring auxiliary equipment. For large complexes, petrochemical refineries, and multi-story plants, bus-type or branch-line detectors (SD2100A/E) interconnected via RS-485 Modbus to an SD8001 control room supervisory console provide centralized telemetry, fault diagnostics, and unified PLC linkage.

With over 18 years of specialized R&D and 40+ intellectual property patents, Shield supports complete private labeling, custom structural injection molds, customized housing colors, custom LCD/OLED user interface localization, modified alarm sound profiles, specialized target gas calibrations, and complete technical compliance documentation packages for regional tender submission.