- Gas Detection Equipment in the Drinks Industry
- Gas Detection Equipment in the Gas & Oil Industry
- Gas Detection Equipment in the Household
- Gas Detection Equipment in the Commercial Field
- Gas Detection Equipment in the Metallurgical Industry
- Gas Detection Equipment in the Energy Storage Industry
- Gas Detection Equipment in the Pharmaceutical Industry
Equipment Selection Logic: Tailored to Scenario Requirements
The selection of gas detection equipment depends on gas properties (density, toxicity, flammability), environmental conditions (explosion-proof/corrosion resistance/temperature), and monitoring objectives (real-time alerts/long-term stability).
Key principles include:
(1) Selection by Gas Type
| Gas Type | Recommended Detector Type | Typical Applications | Key Parameters |
| Flammable Gases (Hydrocarbons) | Catalytic combustion (light hydrocarbons), Infrared (heavy hydrocarbons/anti-poisoning) | Gasoline/diesel vapors (refineries), methane (natural gas pipelines) | Catalytic: LEL range (0–100%); Infrared: 0–100% VOL (anti-sulfur) |
| Toxic Gases | Electrochemical (H₂S/CO/SO₂), PID (VOCs) | H₂S (sulfur-containing gas wells), benzene (chemical plants), CO (furnaces) | Electrochemical: ≤1 ppm (H₂S); PID: ppb-level (benzene) |
| Hydrogen | Thermal conductivity, Electrochemical | Hydrogen compressor rooms (hydrogen leaks are highly explosive; thermal conductivity resists interference) | Thermal conductivity: High sensitivity to hydrogen |
| Oxygen | Electrochemical | Confined spaces (e.g., wastewater ponds, gas storage) for monitoring hypoxia/hyperoxia | Range: 0–30% VOL; Thresholds: ≤19.5% VOL (deficiency), ≥23.5% VOL (excess) |
(2) Selection by Environmental Conditions
● Explosion-Prone Areas (e.g., refinery units, gas stations): Must use explosion-proof detectors (compliant with GB 3836.1-2010, e.g., Ex dⅡCT6 for Zone 1/2).
● High-Humidity/Corrosive Environments (e.g., offshore platforms, sewage ponds): Require IP68-rated enclosures (waterproof/dustproof) with sensor materials like 316L stainless steel or PTFE (polytetrafluoroethylene) (corrosion-resistant).
● Low-Temperature Environments (e.g., LNG tanks): Use low-temperature-resistant sensors (operating range -40°C to +70°C) to prevent condensation-induced inaccuracies.
(3) Selection by Monitoring Objective
● Fixed Detectors (Continuous Monitoring): Installed in critical areas (e.g., tank farms, reactor vicinities) with 4–20mA signal output, audible/visual alarms, and interlock controls.
● Portable Detectors (Inspection/Emergency Use): Carried by personnel (e.g., before entering sewage ponds) with real-time display, data logging, and over-limit alarms.
● Wireless Smart Detectors (Remote Monitoring): Transmit data via LoRa/NB-IoT to central control rooms, ideal for unmanned valve chambers/remote tanks (e.g., long-distance pipeline unmanned zones).