Complete safety-yellow combustible gas detector with black percent-LEL display and red beacon

Cleanroom Control and Environmental Monitoring Systems

Combustible Gas Sensor

A fixed percent-LEL gas detector that monitors flammable gas or vapor accumulation and activates local and remote alarms before hazardous concentration develops.

Percent-LEL Monitoring
Catalytic or Infrared Sensor
Local Warning and Alarm
Remote Shutdown Outputs

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Product Introduction

The fixed combustible gas detector measures a selected flammable gas using a catalytic bead or infrared absorption sensor. Its display presents concentration as a percentage of the lower explosive limit, while independent warning and alarm thresholds can start ventilation, isolate gas supply or activate evacuation indication. A flame-resistant sintered inlet protects the sensing element while allowing gas diffusion. Infrared versions are well suited to many hydrocarbons and resist poisoning mechanisms that can affect catalytic elements; catalytic versions provide broad combustible-gas response where oxygen is present.

Key Features

Percent-LEL indication communicates flammable concentration relative to the gas hazard threshold.

Catalytic and infrared sensing choices address different gas families and operating conditions.

A sintered metal inlet protects the active element while permitting ambient gas diffusion.

Alarm relays and analog or digital outputs support ventilation and gas-isolation actions.

Customer Product Concerns

Combustible gas detection must account for the target gas, sensor technology, oxygen availability and potential catalyst poisons.

A catalytic sensor is exposed to silicone or sulfur compounds that reduce sensitivity.Sensor-technology selection and planned response checks address known catalyst-poison risks.

The chosen infrared sensor does not respond to the target gas family.The optical wavelength and calibration gas are matched to the expected combustible compound.

A gas leak reaches the ceiling or floor before the detector location.Detector height follows gas density, release pressure and room-air movement.

The local detector alarms but ventilation or gas shutoff does not respond.Dedicated relay outputs link warning and alarm thresholds to engineered control actions.

Typical Applications

Solvent-use cleanroom supportHydrogen utility roomsFlammable gas cabinetsBattery and process equipment areas

Technical Parameters

Typical construction values for a fixed combustible gas detector are listed below.

Core Material	Catalytic bead or infrared optical cell in coated aluminum transmitter with stainless sintered sensor inlet
Panel Thickness	80-140 mm detector depth
Effective Width	130-220 mm transmitter width
Maximum Length	Up to 320 mm overall detector height
Steel Facing Thickness	0.8-1.2 mm stainless guard and mounting hardware
Core Density	2650-2750 kg/m³ for aluminum transmitter body
Thermal Conductivity	150-220 W/(m·K) for aluminum enclosure material
Surface Finish	Safety-yellow or gray coated aluminum body with black display and red alarm beacon
Joint Type	Threaded sintered sensing head with sealed conduit entries and removable relay terminals
Customization	Available based on the intended application and operating environment.

Available Options

Catalytic or infrared sensorTarget-gas calibrationLocal display and beaconRelay, analog and digital outputs

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