Forensics 4 Gas Wall-Mount Monitor — Fixed CO, H2S, O2 & LEL

Read the full Forensics 4 Gas Wall-Mount Monitor review →

The Forensics 4 Gas Wall-Mount Monitor is a fixed, continuously-monitoring detector reading carbon monoxide, hydrogen sulfide, oxygen and combustible LEL from a single head, with a relay output that drives ventilation, alarms or shutdown, plus adjustable alarms per gas and NIST-traceable calibration — a monitoring device, not respiratory protection.

CHECK PRICE ON AMAZON → SHOP FIXED SYSTEMS →

As an Amazon Associate, WC Safety earns from qualifying purchases.

Why the Forensics 4 Gas Wall-Mount covers four hazards from one head

A space with multiple atmospheric hazards can need four separate fixed sensors — or one head that reads them all. This wall-mount monitor is the all-in-one: it covers CO, H2S, O2 and combustible LEL continuously from a single fixed head, with a relay output that drives ventilation, alarms or shutdown when any gas is detected, and adjustable alarms per gas with NIST-traceable calibration. As fixed gas detection systems go, this is the all-in-one wall-mount pick, and the gas detection guide and the best 4-gas monitor guide explain where it fits. It guards a four-hazard space from a single mounted unit.

What the Forensics 4 Gas Wall-Mount listing documents

From the published specs: a fixed, continuously-monitoring detector; coverage of CO, H2S, O2 and combustible LEL from one head; a relay output for ventilation, alarm or shutdown; adjustable alarms per gas; and USA NIST-traceable calibration. These are true fixed 4-gas monitor and wall-mount gas detector credentials in an area 4-gas monitor. Confirm the mounting, power, and relay output on the listing.

How the Forensics 4 Gas Wall-Mount compares to other gas detectors

For a fixed combustible-gas wall-mount, the Forensics EX LEL Wall-Mount; for a fixed hydrogen wall-mount, the Forensics Hydrogen Detector; for a transportable datalogging 4-gas, the Forensics Data Logger; for a fixed CO monitor, the Macurco PM100-CO; and for a portable four-gas, the Forensics Detectors 4-Gas. The 4-gas vs single-gas guide and the combustible detector vs leak detector guide help you choose.

Choosing the right gas monitor

Match the gases, mounting, and output to your space. Browse the gas detectors, area gas monitors, and carbon monoxide monitors collections; for portable options, the portable gas detectors and personal gas detectors collections; and for calibration, the calibration accessories collection and the personal monitor guide.

Where it fits by job and facility

The 4 Gas Wall-Mount suits boiler rooms, pump and equipment rooms, and enclosed process areas that need continuous coverage of all four atmospheric hazards from one mounted head — see the gas detection guide and the industrial CO guide for the portable instruments workers carry into those spaces. A relay-driven all-in-one head simplifies a fixed system where multiple hazards share a space. Confirm the mounting position, power, relay wiring, and per-gas setpoints on the listing, and calibrate on schedule. For orders, quantity purchasing runs through a free Amazon Business account — volume pricing, PO numbers at checkout, and tax-exempt eligibility for qualifying organizations, with the walkthrough linked in our footer.