Integrated solution for gas safety monitoring in warehousing and logistics

## Key Monitoring Nodes

### Hazardous Chemicals Warehouse (Classified According to GB 17914)

– **Class A warehouse** (flash point < 28℃, strong combustion): acetone / ether / methanol / benzene, etc. → LEL + PID (VOC PPB level) + infrared imaging
– **Class B storage** (flash point: 28-60℃): diesel / heavy oil / alcohols → LEL + smoke detection
– **Class C warehouse** (above 60℃ + flammable solids): sulfur / nitrates → LEL + temperature (preventing spontaneous combustion)
– **Corrosive Chamber** (Acid and Alkali): HCl / sulfuric acid mist + Cl2 (bleach) + NH3 (ammonia)
– **Highly Toxic Substance Warehouse** (double-person double-lock): dedicated probe for highly toxic substance leakage + video linkage + intrusion alarm

### Cold Chain Cold Storage

– **Ammonia refrigeration room**: NH3 (range 0-1000 ppm, 10 ppm warning + 30 ppm emergency exhaust activation) + O2 + LEL
– **Inside cold storage (-18℃ to -25℃)**: Probe specifically designed for low-temperature environments (regular probes become ineffective at -10℃)
– **Refrigerated vehicle loading and unloading port**: CO2 + oxygen deficiency (dry ice transportation)

### AGV / Lithium Battery Charging Area (Emerging Risk)

– **H2 (hydrogen)**: H2 will be released during the early stages of thermal runaway in power batteries (lithium iron phosphate / ternary), and the sensor sensitivity is set at 0.01 ppm to trigger an alarm
– **CO**: By-product of battery electrolyte decomposition
– **Smoke**: Early indication of a fire hazard
– **Infrared thermal imaging**: Battery temperature field inversion, with normal temperature 50℃ automatically triggering an alarm, initiating directional measures, and isolating the area
– **Emergency linkage**: Detection of thermal runaway symptoms → Initiation of targeted fire suppression + emergency ventilation + area isolation + notification to operators

### Hazardous Materials Loading and Unloading Station (Road / Rail / Wharf)

– Fixed LEL + H2S + Grounding Wire Status
– Crew portable 4-in-1
– Flow rate / concentration measurement (oil and gas recovery efficiency ≥ 95%)
– Video linkage violation recognition (no PPE handling / no electrostatic discharge wristband worn)

## Key Technical Indicators

– Explosion-proof: Ex d IIB T4 (Class A warehouse) / Ex d IIC T6 (H2-containing lithium battery charging area)
– Protection: IP65 (IP66 in cold storage + low temperature tolerance)
– Range: H2 0.01-100% LEL (ppb sensitivity required for lithium battery scenarios)
– Operating temperature: -30℃ ~ +60℃ (cold storage + outdoor warehouse)
– Communication: 4G + LoRa (warehouses usually lack WiFi coverage)
– Battery life: Remote hazardous chemical warehouses require a battery-powered version with a 5-year lifespan

## Implementation Key Points

1. **Hazardous Chemicals Warehouse Level Response**: Low alarm → warehouse manager checks; high alarm → initiates spraying/ventilation + notifies supervisor; ultra-high alarm → emergency response + evacuation + 119 linkage
2. **AGV Charging Thermal Runaway**: Detection of H2 + abnormal temperature → immediate shut-off of the charging station + isolation + initiation of targeted fire suppression
3. **Cold chain ammonia leakage**: NH3 is easily soluble in water. In emergency situations, use water spray for dilution, initiate emergency ventilation, and shut down the compressor
4. **Customs + Emergency Management Bureau Compliance**: All gas monitoring data in cross-border logistics scenarios can be integrated with the customs declaration system + Emergency Management Bureau
5. **Multi-customer shared warehouse**: Each shipper has an independent account + data isolation to prevent the leakage of trade secrets

## Regulatory Basis

– GB 17914-2013 “Technical Conditions for Storage and Maintenance of Inflammable and Explosive Goods”
– GB 50016-2014 Code for Fire Protection Design of Buildings
– GB 50140-2005 Design of Fire Extinguisher Allocation in Buildings
– Regulations on the Safety Administration of Hazardous Chemicals (Decree No. 591 of the State Council)
– AQ/T 9006 Emergency rescue command and handling
– GB 50493-2019 Detection and Alarm Design for Industrial Gas Detection Equipment
– GB 50057-2010 Design of Lightning Protection for Buildings (Lightning Protection for Warehouses)

## Applicable Customers

Third-party logistics (SF Express / JD.com / ZTO Express / YTO Express / Yunda Express / Best Express); hazardous chemical logistics (Sinotrans Hazardous Chemicals / Linde Logistics / Air Liquide / Shanghai Petroleum Transportation); bonded area + cross-border logistics warehouse; cold chain logistics (China Merchants Cold Chain / Swire Cold Chain / SF Cold Chain); e-commerce warehouse automation (JD Asia 1 / Alibaba Cainiao / Pinduoduo Jietu); port logistics (Shanghai Port Group / Ningbo Port / China Merchants Port); chemical park central warehouse + park supervision platform.