YJJ 4LEL-3.0V 090-R000-000 Catalytic Combustion Flammable Gas LEL Sensor

Product Description:

YJJ 4LEL-3.0V 090-R000-000 Catalytic Combustion Flammable Gas LEL Sensor

Features:

I. Core Parameters (Quick Overview)

Range: 0–100% LEL (Lower Explosive Limit)

Maximum Overload: 100% LEL

Sensitivity (20℃, CH₄): 22±7 mV/%CH₄

Response Time T90: < 30 seconds

Resolution: 1% LEL

Linearity: ≤ ±5%FS

Operating Voltage: 3.00±0.02 VDC (typical 3.0V)

Operating Current: 95±15 mA

Operating Temperature: −30℃ ~ +50℃

Humidity: ≤ 98% RH (25℃, no condensation)

Pressure: 86–116 kPa

Life Span: > 2 years in air; 12 months in storage

Anti-Toxicity: Non-toxic (H₂S ≤ 6ppm)

Shell: 316L Stainless Steel, Φ24.2×26.8mm

Interface: 4-pin (compatible with 4R + LEL position)

Warranty: 18 months

II. Parameter Meanings (Why This Configuration)

0–100% LEL: Covers from 0 (safe) to 100% (explosive danger), with 20% LEL (low alarm) and 50% LEL (high alarm) as the common alarm levels.

3.0V/95mA: Standard 4 series power supply, directly replacing - C03-0801-000 (Whittle LEL), no need to modify the circuit.

−30 to +50℃: Suitable for wide temperature scenarios such as outdoors, boiler rooms, and underground mines.

Catalytic Combustion Principle: Sensitive to most combustible gases, with good linearity and low cost; however, it will be inaccurate in low oxygen (< 8% O₂) conditions and will be poisoned and fail at high concentrations of H₂S.

III. Main Applications (Industry Scenarios)

1) Industrial Safety (Core)

Gas / Petrochemical: Monitoring of combustible gas leakage in natural gas pipelines, LNG stations, refineries, heating furnaces / torches.

Coal Mines / Underground: Methane (methane) detection to prevent methane explosions.

Metallurgy / Coking: Leakage alarm for coke oven gas, blast furnace gas.

Enclosed Spaces: Before entering ships, storage tanks, sewers, reaction vessels, etc., detect the presence of combustible gases.

2) Commercial and Daily Life

Commercial Kitchens / Hotels: Gas (natural gas / liquefied gas) leakage alarm.

Boiler Rooms / Gas Meter Rooms: Monitoring of gas equipment leakage.

Underground Pipe Lanes / Cable Tunnels: Early warning of gas accumulation.

Specifications: