Is the Lower Explosive Limit (LEL) the same as the alarm setpoint?

No. LEL is the minimum concentration at which a gas can ignite; for methane it is about 5% by volume, which equals 100% LEL on the detector scale. Alarm setpoints are set well below it, typically at or below 25% LEL for the first-level alarm, according to the local code that governs the project.

Where should a household combustible gas detector be installed?

Mount according to gas density: for natural gas (methane, lighter than air) install high, close to the ceiling; for LPG (heavier than air) install low, close to the floor. Keep the detector within a few metres of the appliance and away from extractor hoods, steam and direct airflow.

Why do oxygen detectors use %VOL instead of ppm?

Normal air contains about 20.9% oxygen by volume, so oxygen deficiency and enrichment are tracked as volume percentages. Common reference alarm points are 19.5% VOL for deficiency and 23.5% VOL for enrichment, which are far easier to read and configure in %VOL than in hundreds of thousands of ppm.

Can a Shield gas detector shut off the gas supply automatically?

Yes. Shield household detectors drive a solenoid valve when the alarm setpoint is reached, and the JYFJS-011 emergency shut-off valve can be triggered by gas alarm systems, fire-protection panels or smart terminals. The valve must be reopened manually so gas cannot return before the hazard is cleared.

What is the difference between a stand-alone and a bus-type point gas detector?

A stand-alone detector such as the SD2130 series alarms locally and drives linkage outputs without a controller, ideal for single zones. Bus or branch-line detectors such as the SD2100A series report to a gas alarm controller (SD8001A/B) installed in a non-hazardous control room for centralized multi-point monitoring.

Does Shield offer OEM and ODM gas detectors?

Yes. With 80+ marketable product models and in-house R&D, Shield supports private labelling, housing and packaging customization and configuration changes for distributors and brand owners. Request the catalog to review available platforms.

Products

High-Quality Household Combustible Gas Detector 6101 Series - Safe Gas Monitoring from China Suppliers & Factory Factory, Factories

High-Quality Gas Alarm Controller Shield 8001AB Series - Reliable Gas Detection System from China Suppliers and Factory Manufacturer, Factory

ODM 4 in 1 Portable Gas Detector BTYQ-Z4 Series - China Suppliers and Factory for Industrial Safety Monitoring Supplier, Suppliers

ODM China Industrial and Commercial Gas Detector SD2130 Series - Reliable Suppliers and Factory Solutions for Safety Monitoring Manufacturers, Suppliers

Wholesale 4 in 1 Portable Gas Detector BTYQ-Z4 Series - Reliable China Suppliers and Factory for Safety Monitoring Manufacturers, Factory

High-Quality Industrial and Commercial Gas Detector Shield SD2100E Series - Reliable China Suppliers and Factory Solutions Supplier, Factory

ODM China JYFJS-011 Aluminum Alloy Electromagnetic Gas Shut-off Valve - Reliable Suppliers & Factory Supplier, Factory

Wholesale China Suppliers - Industrial and Commercial Gas Detector SD2130 Series from Factory for Real-Time Combustible Gas Detection Factory, Factories

OEM China SD6200 Series Household Combustible Gas Detector - Reliable Safety from Trusted Suppliers and Factory Supplier, Factory

Wholesale China Gas Alarm Controller Shield 8001AB Series - Reliable Suppliers and Factory for Gas Safety Solutions Manufacturers, Suppliers

High-Quality Portable Gas Leak Detector JLY-CP100 Series - Reliable Safety Monitoring by China Suppliers and Factory Supplier, Suppliers

High-Quality 4 in 1 Portable Gas Detector BTYQ-Z4 Series - China Factory Suppliers for Industrial Safety Monitoring Manufacturer, Factory

Wholesale Household Combustible Gas Detector SD6103K Series - Reliable Safety Solution from China Suppliers and Factory Suppliers, Factory

Wholesale Portable Gas Detector Pen JLY-50A Series from China Suppliers and Factory | High Sensitivity, Waterproof, Explosion-Proof Supplier, Factories

OEM China SD6101 Household Combustible Gas Detectors - Reliable Safety Solutions from Trusted Suppliers and Factory Manufacturer, Suppliers

ODM China SD2100A Series Industrial and Commercial Gas Detector - Reliable Suppliers and Factory for Real-time Gas Monitoring Manufacturer, Factory

High-Quality Portable Gas Detector SD3001 Series - Reliable Safety Solution from China Suppliers and Factory Manufacturer, Factory

ODM Industrial and Commercial Gas Detector SD2100E Series - Reliable China Suppliers and Factory Solutions Manufacturers, Factory

Wholesale Household Combustible Gas Detector SD6200 Series - China Suppliers & Factory Safety Solution Manufacturers, Supplier

OEM Portable Gas Detector Pen JLY-50A Series - China Suppliers & Factory for Industrial Safety Monitoring Supplier, Suppliers