
The Filosha Four-Gas Detector is a rugged portable monitor that simultaneously tracks the four atmospheric hazards most common to confined-space entry: oxygen level, flammable LEL gases, carbon monoxide and hydrogen sulphide. Rechargeable and shift-ready, it delivers clear multi-gas readings and immediate multi-sense alarms to keep entry teams safe in tanks, vessels and enclosed workspaces.
The Filosha Four-Gas Detector combines four calibrated sensors in a single compact instrument to give a complete picture of the four principal atmospheric threats faced during confined-space entry and general area monitoring. It measures oxygen concentration to flag both enrichment and depletion, detects flammable gases and vapours as a percentage of the lower explosive limit, and monitors the toxic gases carbon monoxide and hydrogen sulphide. Live readings for all four channels appear together on a bright, easy-to-read display, while loud audible tones, high-intensity visual flashes and a strong vibrating alarm ensure hazards are recognised instantly, even amid heavy machinery noise or protective equipment.
Purpose-built for the demands of GCC and Indian industry, the detector is housed in a rugged, drop-resistant enclosure that shrugs off dust, heat and humidity through long working shifts. A rechargeable long-run battery keeps running costs low and the unit shift-ready, while straightforward one-button operation, bump-testing and calibration keep training minimal and compliance simple. Onboard datalogging captures every reading and alarm event to support permit-to-work records and safety audits. Whether clipped to an entry team member, positioned at a work face or used to clear a space before access, the Four-Gas Detector delivers the reliable, all-in-one atmospheric monitoring that confined-space programmes, maintenance crews and process operations depend on daily.
| Gases monitored | O2, LEL, CO, H2S |
|---|---|
| Sensor count | Four |
| Power | Rechargeable battery |
| Alarms | Audible, visual and vibrating |
| Sampling | Diffusion (pump optional) |
| Logging | Onboard datalogging |
| Housing | Rugged, drop-resistant |
Specifications are indicative. Contact us for full technical data, datasheets and available variants.

Multi-gas monitor adding a fifth channel such as VOC or an extra toxic gas, pump or diffusion.

Multi-gas monitor with internal pump for pre-entry checks of tanks, vessels and manholes.

Compact clip-on personal monitor for one hazardous gas with audible, visual and vibrating alarms.
Tell us your requirement and our team will respond with pricing and technical details.