
Portable H2s Co Gas Detector for Underground Sewerage System 4 in 1 Gas Detector. Multi-Gas Detection: Simultaneously detects 1-5 gases using Infrared, Electrochemical, or PID sensors. Dual Sampling Methods: Supports natural diffusion and built-in pump suction for confined spaces. Wireless Monitoring: Optional Bluetooth and 4G connectivity for real-time remote monitoring via app. Durable Design: Compact size (4/5 of a phone), IP67/IP66 rating, and one-handed grip operation. 5-Year O2 Sensor: Long-life oxygen sensor reduces maintenance frequency and leakage risks. Advanced Accuracy: Features temperature compensation algorithm to improve detection reliability. User-Friendly Interface: 2.5-inch LCD with backlight, 4-button design, and one-click shortcut operations.