LEL Gas
Detection

IAQ Detectors, the instrumentation brand of Ace Instruments, manufactures a CE certified flameproof (FLP) hydrogen and LEL detector for battery rooms, UPS enclosures, and confined spaces where flammable gas accumulation is a hazard. The instrument uses catalytic bead detection and outputs via Modbus RS-485 for BMS and safety-panel integration.

LEL (Lower Explosive Limit) is the minimum concentration of a flammable gas in air capable of ignition. Hydrogen has an LEL of 4% by volume, making continuous monitoring essential wherever battery banks off-gas hydrogen during charging.

Catalytic bead detectionFlameproof (FLP) enclosureModbus RS-485CE certified1 instrument

View the LEL detector →Talk to an application engineer

LEL reference: % by volume

0%4%25%75%

Hydrogen LEL4%

Methane LEL5%

Propane LEL2.1%

Hydrogen UEL75%

Common applications

Where continuous LEL monitoring is required

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UPS & battery rooms

Hydrogen off-gassing from lead-acid and VRLA battery banks during charging requires continuous LEL monitoring per confined-space safety practice.

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Industrial facilities

Gas storage and process areas handling flammable gases integrate LEL detectors into plant safety systems.

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Hospitals & labs

Gas cylinder storage and backup power rooms in healthcare facilities are monitored per ASHRAE 170-2021 mechanical safety provisions.

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Data centres & server rooms

UPS battery rooms supporting data centre operations require continuous hydrogen monitoring as a fire-prevention measure.

Expert guidance

Not sure which LEL detector configuration fits your battery room?

Our application engineers will confirm hazardous-area classification, mounting location, and BMS integration requirements for your installation. Most enquiries answered within 24 hours.

Talk to an expert →sales@iaqdetectors.com

+91 8121025651 · Hyderabad, India

LEL GasDetection

Common applications

Not sure which LEL detector configuration fits your battery room?

LEL Gas
Detection