Handheld four-gas detector showing O2, LEL, CO and H2S readings at a confined space
Gas Detection · Portable Gas Detectors

Four-Gas Detector

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.

O2 / LEL / CO / H2SRechargeableConfined space4-in-1
Genuine products · Technical support · Fast delivery across India & the GCC

Product Description

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.

Key Features

  • Simultaneous O2, LEL, CO and H2S monitoring
  • Bright multi-channel display
  • Audible, visual and vibrating alarms
  • Rechargeable long-run battery
  • Rugged, drop-resistant enclosure
  • Data logging and bump-test support

Applications

  • Confined-space entry pre-checks
  • Tank, vessel and silo inspection
  • Refinery and process plant work
  • Maintenance and shutdown activities
  • Shipboard and offshore compartments
  • Utility, sewer and manhole tasks

Benefits

  • Complete four-hazard coverage in one unit
  • Faster, safer confined-space clearance
  • Rechargeable for low running costs
  • Clear evidence trail via data logging

Technical Highlights

  • Four independent calibrated sensors
  • Percentage-LEL catalytic detection
  • Configurable TWA and STEL alarms
  • Onboard datalogging with download

Industries Served

Oil & GasPetrochemicalMarine & OffshoreChemicalWater & WastewaterPower & Utilities

Specifications

Gases monitoredO2, LEL, CO, H2S
Sensor countFour
PowerRechargeable battery
AlarmsAudible, visual and vibrating
SamplingDiffusion (pump optional)
LoggingOnboard datalogging
HousingRugged, drop-resistant

Specifications are indicative. Contact us for full technical data, datasheets and available variants.

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