Forensics EX LEL Gas Detector — Wall-Mount Industrial (0-100% LEL, Relay Output)

Forensics EX LEL Gas Detector — Wall-Mount Combustible Monitor

The Forensics EX LEL gas detector is a wall-mounted, continuously-monitoring combustible head reading 0-100% LEL — a fixed gas detection system that drives ventilation or shutdown through its relay output. It protects an unattended space around the clock, where a carried instrument cannot.

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The Forensics EX LEL Gas Detector is a wall-mounted fixed combustible-gas monitor (0-100% LEL) with relay output, adjustable alarms and NIST-traceable calibration for continuous unattended monitoring.

Key features

• Continuously monitors combustible gas across 0-100% LEL on a fixed wall-mounted head
• Relay output drives ventilation, alarms or shutdown when gas is detected
• Adjustable audible and visual alarms set to your action levels
• USA NIST-traceable calibration for documented accuracy
• Rugged aluminum industrial enclosure for plant environments
• Always-on protection for an unattended space

Specifications

Where the Forensics EX LEL Gas Detector fits

• Boiler and mechanical rooms
• Compressor and pump houses
• LPG/natural-gas storage and use areas
• Paint and solvent areas
• Any space needing continuous combustible monitoring

What the Forensics EX LEL Gas Detector detects (and what it doesn’t)

This head monitors combustible gases as %LEL — not toxics, oxygen or refrigerants. For toxic or oxygen monitoring choose the Forensics 4 Gas Wall-Mount Monitor; for hydrogen specifically, the Forensics Hydrogen Detector. Mount combustible heads per the gas density — high for lighter-than-air gases like methane, lower for heavier propane. Its relay output ties into ventilation or shutdown. A fixed head protects the space; entrants still need a Portable Gas Detectors instrument for pre-entry testing and a Personal & Wearable Gas Detectors clip during work.

Cross-shopping? This unit sits in our Fixed Gas Detection Systems hub alongside Forensics Hydrogen Wall-Mount, Forensics 4 Gas Wall-Mount, Macurco PM100-CO, Macurco GBC-24-2. For other gas-detection form factors see Portable Gas Detectors, Personal & Wearable Gas Detectors, Area & Transportable Gas Monitors, or browse the full Gas Detectors range.

Forensics fixed wall-mount family compared

• Choose the EX LEL Detector for continuous combustible-gas monitoring of a single area.
• Need toxics and oxygen too? Use the 4 Gas Wall-Mount Monitor.
• Monitoring a battery room? The Hydrogen Detector is purpose-built.

Frequently asked questions

What does the Forensics EX LEL gas detector monitor?

Combustible gases across 0-100% LEL, continuously, from a fixed wall-mounted position. It does not detect toxics, oxygen or refrigerants.

What is the relay output for?

The relay lets the detector trigger external action when gas is detected — starting ventilation, sounding a remote alarm, or shutting down equipment.

Where should I mount a combustible gas detector?

By gas density — high on the wall for lighter-than-air gases like methane and hydrogen, lower for heavier gases like propane — and between likely release points and occupied areas.

Is it NIST calibrated?

Yes — it ships with USA NIST-traceable calibration. Plan periodic recalibration with combustible calibration gas to keep readings accurate.

Does it run continuously?

Yes — it is a mains-powered fixed head designed for continuous, unattended monitoring, unlike a carried portable instrument.

Can it replace a portable detector for confined-space entry?

No — pre-entry testing of a space still needs a Portable Gas Detectors instrument. A fixed head provides ongoing monitoring of the installed area.

How many detectors do I need?

One head covers one area near its release points; larger or multi-room spaces need additional heads positioned by airflow and gas density.

What alarms does it have?

Adjustable audible and visual alarms, plus the relay output for external devices. Set the action levels to your site's requirements (combustibles often alarm at 10% and 20% LEL).

Does it detect carbon monoxide or hydrogen sulfide?

No — it is combustible-only. For CO, H2S and O2 use the Forensics 4 Gas Wall-Mount Monitor.

Is it in stock and how does it ship?

Use the Amazon buy button for current availability and delivery timing through our fulfillment partner.

Does installation require an electrician?

It is a hard-wired mains device, so installation and relay wiring should follow local electrical code and, in classified areas, the area-classification wiring methods.

Can I tie it to building ventilation?

Yes — that is a primary use of the relay output: energise exhaust fans or a shutdown circuit automatically when combustible gas reaches the alarm level.