| Portable Single-Gas Detector | Personal warning before exposure to one specific hazardous gas. | Carbon monoxide, hydrogen sulfide, oxygen, chlorine, ammonia | Electrochemical sensor | Confined spaces, maintenance work, inspection routes | Sensor life, alarm set points, ingress protection, calibration method, battery runtime |
| Portable Multi-Gas Detector | Simultaneous monitoring of atmospheric hazards during entry and emergency response. | Oxygen, combustible gases, carbon monoxide, hydrogen sulfide | Electrochemical, catalytic bead, infrared, or photoionization sensors | Tanks, sewers, utility vaults, process areas | Number of channels, pump option, data logging, sampling hose length, bump-test workflow |
| Fixed Point Gas Detector | Continuous area monitoring with automatic alarm transmission. | Methane, propane, hydrogen, ammonia, chlorine, sulfur dioxide | Catalytic bead, infrared, electrochemical, or semiconductor | Production halls, compressor rooms, cylinder storage, laboratories | Mounting height, area coverage, relay outputs, communication protocol, enclosure rating |
| Open-Path Gas Detector | Detects gas clouds across a long optical path rather than at a single point. | Methane, hydrocarbons, carbon dioxide | Infrared beam absorption | Perimeters, loading areas, pipelines, offshore and large outdoor facilities | Path length, line of sight, weather conditions, beam alignment, false-alarm resistance |
| Area Gas Monitoring System | Protects a defined zone by combining multiple sensors, alarms, and control outputs. | Combustible gases, toxic gases, oxygen deficiency or enrichment | Mixed sensor architecture with centralized controller | Chemical plants, warehouses, battery rooms, gas cabinets, laboratories | Sensor mapping, zoning, alarm beacons, ventilation interlocks, emergency shutdown logic |
| Sample-Draw Gas Detection System | Draws air from remote or difficult-to-access locations for centralized analysis. | Toxic gases, refrigerants, solvents, oxygen, combustible gases | Pump-driven sampling with electrochemical, infrared, or photoionization sensors | Cleanrooms, analyzer shelters, cable tunnels, cold rooms, enclosed equipment | Tube material, transport delay, filter maintenance, pump capacity, sample-point quantity |
| Combustible Gas Alarm | Warns of flammable gas concentrations before they reach dangerous levels. | Methane, propane, butane, hydrogen, natural gas vapors | Catalytic bead or infrared | Boiler rooms, kitchens, gas storage, refueling facilities, process plants | Lower explosive limit measurement, gas density, ventilation pattern, ignition-source control |
| Toxic Gas Alarm | Provides early warning when toxic exposure may exceed occupational limits. | Hydrogen sulfide, carbon monoxide, chlorine, ammonia, sulfur dioxide | Electrochemical or photoionization | Water treatment, refrigeration, metal processing, pulp and chemical production | Exposure limits, cross-sensitivity, humidity tolerance, sensor response time, calibration gas |
| Oxygen Deficiency Monitor | Alerts personnel when oxygen concentration falls below a safe working level. | Oxygen; often combined with nitrogen, helium, argon, or carbon dioxide monitoring | Electrochemical oxygen sensor | Cryogenic storage, inert-gas rooms, laboratories, food processing, confined spaces | Typical alarm threshold near 19.5% oxygen, ventilation response, sensor replacement interval |
| Gas Detection Controller and Alarm Panel | Receives detector signals and activates visual, audible, ventilation, or shutdown functions. | Multiple combustible, toxic, and oxygen-related hazards | Digital or analog input modules with programmable logic | Central control rooms, plant utility areas, distributed industrial facilities | Channel capacity, relay logic, Modbus or other interfaces, event history, backup power |