Sourcing gas detection equipment is a safety-critical decision. The wrong specification can mean slower detection, false alarms, or failed certification audits. This guide covers what matters most.
1. Identify Your Target Gas
The single most important specification is which gas you need to detect. Commercial environments typically involve:
- LPG (Liquefied Petroleum Gas) - used in restaurants, hotel kitchens, and areas without piped natural gas
- Natural Gas (Methane/CH4) - the standard for piped municipal gas in most countries
- CO (Carbon Monoxide) - a colorless, odorless byproduct of incomplete combustion, especially dangerous in enclosed spaces
- Multi-gas - environments with multiple risk sources require multi-channel or multi-sensor detectors
A detector calibrated for LPG will not reliably detect natural gas at the same concentration thresholds, and vice versa. Always specify the gas type in your procurement documents.
2. Understand LEL Thresholds
LEL stands for Lower Explosive Limit - the minimum concentration at which a gas can ignite. A gas detector should trigger an alarm well before reaching 100% LEL. Industry best practice is:
Soosan Hometech detectors are calibrated to alarm at 25% LEL, providing significant safety margin before any explosive risk is reached. This is the threshold required by Korean KGS standards and recommended internationally.
3. Check Certifications for Your Market
Certifications determine whether the equipment can legally be installed in your market. Do not source equipment that doesn't carry the right marks:
| Certification | Covers | Required for |
|---|---|---|
| KGS | Korea | Korean domestic market |
| KC | Korea (Electrical Safety) | All electrical products in Korea |
| KFI | Korea (Fire) | Fire-rated installations in Korea |
| CE | European Union | EU market access |
| ISO 9001 | Quality Management | Quality assurance baseline |
4. Alarm Output and Integration
For commercial deployments, a standalone detector that only sounds an audible alarm is rarely sufficient. Verify the following output options:
- Relay output - for triggering automatic shutoff valves, ventilation, or building management systems
- Audible alarm (dB rating) - 85dB minimum for commercial noise environments
- Visual alarm (LED/strobe) - required in high-noise environments
- RS-485 / Modbus - for multi-point monitoring via a central controller
- 4-20mA analog output - for PLC integration in industrial settings
5. Sensor Lifespan and Replacement
Electrochemical and catalytic bead sensors degrade over time. Ask your supplier for the rated sensor lifespan and whether replacement sensors are available domestically in your market. A 3-5 year sensor lifespan is standard for quality commercial detectors. Soosan Hometech products are designed for field sensor replacement without returning the full unit.
6. Sourcing Checklist
Gas Detectors for Commercial Applications
Our FB-365, FB-370, and COB-380V series cover LPG, Natural Gas, and CO detection with KGS, KC, and KFI certification - ready for Korea and international markets.