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Gastec GOMC-3A Multiple gas detector for Oxygen, Flammable Gases, Carbon monoxide

Gastec GOMC-3A Multiple gas detector for Oxygen, Flammable Gases, Carbon monoxide

A rugged, portable multi-gas detector that monitors three critical safety parameters: Oxygen deficiency, Explosive gas concentrations (%LEL), and Carbon Monoxide toxicity. It features a high-visibility digital display and robust alarm systems.

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Description

The GOMC-3A utilizes a combination of three distinct sensing technologies:

  1. Oxygen: A galvanic cell (typically the H-3A sensor).

  2. Flammable Gas: A catalytic combustion sensor (typically the FG-3A) tuned for general hydrocarbons.

  3. Carbon Monoxide: A controlled potential electrolysis sensor (typically the CO-603E).

The device is built for “suction-type” sampling, allowing users to draw air from confined spaces via an extension hose before entering. It includes an integrated pump and a high-decibel alarm system to warn users the moment any of the three gases cross safe thresholds.

Brand

Gastec

GASTEC

Although, technology is always evolving, one demand on our products never changes: the demand for customer safety. Whenever we contribute to customer safety, we are presented with an opportunity to develop further.

GASTEC holds this corporate creed of safety and development in high esteem, as it strives to grow while always putting customer safety first.

Features

  • Triple Gas Monitoring: Provides full environmental situational awareness by tracking O_2,CO, and Flammable gases at once.
  • Built-in Sampling Pump: Allows for remote measurement of deep tanks or manholes using an extension hose (often up to 30m).
  • Explosion-Proof Design: Certified for use in Zone 0 or Zone 1 hazardous areas where flammable vapors may be present.
  • Rugged Housing: Impact-resistant and splash-proof, designed to survive the harsh conditions of maritime and industrial maintenance.
  • Simultaneous Display: The backlit LCD shows all three gas concentrations on a single screen, reducing the need to toggle between menus.

Specifications

FeatureSpecification
Model NumberGOMC-3A
Target GasesOxygen, Flammable Gases, Carbon Monoxide
Oxygen Range0.0 – 25.0%
Flammable Range0 – 100% LEL
$CO$ Range0 – 300 ppm (Enhanced up to 999 ppm)
Sampling MethodInternal Suction Pump
Alarm SystemAudible, Visual (LED), and Vibration

 

Applications

Pre-Entry Safety Sampling: The GOMC-3A is applied as a primary “clearance” tool before personnel enter a potentially hazardous area.

  1. Fresh Air Startup: Power on the unit in a clean, fresh-air environment. The device will self-check the battery and the three sensor modules.
  2. Auto-Zero/Span: Perform the “One-Touch” calibration. This sets $O_2$ to 20.9%, $CO$ to 0 ppm, and Flammable gases to 0% LEL.
  3. Remote Sampling: Attach the extension hose. Lower the probe into the confined space. Wait for the pump to draw the sample through the line (typically 1 second per meter of hose plus sensor response time).
  4. Continuous Monitoring: Once inside, the worker can keep the unit powered on to monitor for localized gas pockets or changing conditions.
  5. Sensor Maintenance: This unit requires periodic replacement of its consumable sensors:

    • Oxygen: Replace the H-3A galvanic cell.

    • CO: Replace the CO-603E electrolysis cell.

    • Flammable: Replace the FG-3A catalytic bead.

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