Compact, Intrinsically Safe Multi-Gas Monitor
The Portable Pump-Suction 4-in-1 Gas Detector is a compact and reliable multi-gas monitoring device designed for industrial safety applications. It supports simultaneous detection of 1–4 gases with fast pump sampling, explosion-proof certification, and multiple alarm modes, making it ideal for hazardous and confined environments.
Core Features
Simultaneous detection of 1–4 gases (configurable)
Selectable concentration units: ppm, μmol/mol, mg/m³, %VOL, %LEL, pphm, ppb
Built-in pump suction sampling (500 mL/min) with moisture & dust filter
Intrinsically safe circuit design with explosion-proof certification
IP65 dustproof & splash-resistant housing
Anti-static and strong electromagnetic interference resistance
Three display modes:
Four-gas simultaneous display
Large-font single-channel cyclic display
Real-time concentration curve
Optional display of Max / Min / Average values
Real-time or timed detection modes
Multiple alarm methods: audible, visual, vibration
Alarm types: concentration, low battery, fault
Alarm modes: low / high / interval / TWA
Automatic zero-point tracking (anti-drift technology)
Multi-level calibration with misoperation prevention
Factory reset function
Optional temperature & humidity measurement
Optional RS485 communication and customizable interfaces
Supports OEM / ODM customization
Technical Specifications
| Item | Specification |
| Detectable Gases | Toxic gases, O₂, CO₂, combustible gases, TVOC (1–4 gases configurable) |
| Detection Principles | Electrochemical, Catalytic Combustion, Infrared (NDIR), Thermal Conductivity, Semiconductor, PID, Laser TDLAS |
| Detection Range | 0–1 / 10 / 100 / 1000 / 5000 / 50000 ppm; 0–100%LEL; 0–200 mg/L; 0–20%, 50%, 100%VOL |
| Resolution | Up to 0.001 ppm; 0.1%LEL; 0.001%VOL (customizable) |
| Typical Accuracy | ≤ ±3% F.S. (customizable higher accuracy available) |
| Linearity | ≤ ±2% |
| Repeatability | ≤ ±2% |
| Uncertainty | ≤ ±2% |
| Response Time | T90 ≤ 30 seconds |
| Recovery Time | ≤ 30 seconds |
| Operating Temperature | –20°C to +55°C (typical); –40°C to +70°C (limit) |
| Operating Humidity | ≤ 95% RH (non-condensing) |
| Sampling Method | Built-in pump suction |
| Flow Rate | 500 mL/min |
| Display | 2.31” 320×240 color screen, 5-button operation |
| Power Supply | DC 3–5V, 4600mAh rechargeable lithium polymer battery |
| Communication | USB (charging & data); optional RS485, infrared |
| Data Storage | 100,000 records (expandable) |
| Protection Rating | IP65 |
| Explosion Protection | Ex ia IIC T4 Ga; Ex iaD 20 T130°C |
| Dimensions | 178 × 67 × 40 mm |
| Weight | Approx. 360 g |
Applications
Oil & Gas Industry
Petrochemical Plants
Pharmaceutical Manufacturing
Environmental Monitoring
Gas Distribution
Warehousing & Confined Space Entry
Flue Gas Analysis
Air Quality Control
Suitable for all scenarios requiring portable and rapid gas concentration detection.
