The Fixed Single Gas Detector is designed for continuous on-site gas concentration monitoring and over-limit alarm in industrial environments. It is capable of accurately detecting the concentration of toxic, harmful, and combustible gases, while displaying the real-time concentration value locally and providing standard signal outputs.
The detector uses advanced gas sensor technologies, including electrochemical, infrared, catalytic combustion, thermal conductivity, and PID photoionization principles, ensuring high sensitivity, stable signals, and reliable measurement accuracy.
The device adopts an explosion-proof wiring design, making it suitable for hazardous and explosive industrial environments.
Product Features
● Explosion-proof, lightning protection, anti-static design, reverse polarity protection, and strong resistance to EMI/EMC electromagnetic interference and surge current impacts.
● Complies with the latest national standards and has obtained CPA metrology approval certification and explosion-proof certification.
● Provides 3-wire or 4-wire 4–20 mA standard signal output, voltage output, and two relay switch outputs.
● Equipped with RS485 bus communication output (RTU protocol) and supports an optional integrated sound and light alarm.
● Supports multiple transmission modes, including wired communication, LAN, Internet, and wireless transmission (2 km, 5 km, or unlimited distance).
● Optional wireless communication methods include 433 MHz, GPRS, WiFi, and other transmission solutions.
● Standard infrared remote controller allows non-intrusive operation in hazardous areas without opening the enclosure, with a remote distance of up to 15 meters.
● Supports unit switching, automatic zero tracking to prevent drift, and multi-level calibration.
● Supports OEM and ODM customization.
● Can communicate with a computer monitoring system, allowing real-time monitoring, data storage, analysis, and printing through the host computer software platform.
Applications
Widely used in industries requiring continuous gas concentration monitoring, including:
• Petroleum and petrochemical industry
• Chemical industry
• Pharmaceutical manufacturing
• Environmental protection monitoring
• Flue gas analysis
• Air pollution control
• Industrial safety monitoring
Technical Specifications
| Item | Specification |
| Detectable Gas | Single gas |
| Product Features | Single gas detection |
| 1.7-inch LCD color display | |
| High cost-performance ratio | |
| 3-wire 4–20 mA output | |
| RS485 output | |
| Explosion-proof rating: Ex db IIC T6 / Ex ia IIC T6 |
Measurement Specifications
| Item | Specification |
| Detection Range | 0–1, 10, 100, 1000, 5000, 10000, 50000 ppm |
| 0–100% LEL | |
| 0–5% Vol, 30% Vol, 100% Vol | |
| Other ranges customizable according to application requirements | |
| Resolution | 0.01% LEL, 0.01% Vol |
| Typical Accuracy | ±3% F.S |
| Detection Method | Diffusion sampling (optional pipeline, flow-through, or pump sampling) |
System Specifications
| Item | Specification |
| Display | 1.7-inch HD color screen |
| Power Supply | DC 24V (optional 220 VAC) |
| Maximum Power Consumption | Not specified |
| Operating Temperature | Typical: -20℃ ~ +55℃ |
| Extreme Temperature | -40℃ ~ +70℃ |
| Humidity | 10–95% RH |
| Data Storage | Not available |
| Printing Function | Not supported |
Output & Alarm
| Item | Specification |
| Signal Output | RS485 bus communication (RTU), 3-wire 4–20 mA |
| Alarm Method | Audible and visual alarm |
| Relay Output | 1–2 relay dry contacts |
| Sound & Light Alarm | Optional external alarm light |
| Fall Alarm | Not supported |
Wireless Communication (Optional)
• LoRa
• 433 MHz
• 4G
• NB-IoT
Physical Specifications
| Item | Specification |
| Dimensions | 238 × 210 × 90 mm (with alarm light) |
| 238 × 152 × 90 mm (without alarm light) | |
| Weight | 1.4 kg (without light) |
| 1.6 kg (with light) | |
| Protection Rating | IP67 |
Standard Accessories
• User manual
• Certificate of conformity
• Warranty card
• Infrared remote controller
• Outer packaging box
Optional Accessories
① Alarm Devices
• Integrated sound and light alarm
• Split-type sound and light alarm
② Power Supply
• 220V–24V DC regulated power supply
③ Computer Monitoring System
• Host computer monitoring software (supports simultaneous video monitoring)
• RS485 / RS232 converter
• USB / RS232 communication cable
• TCP/IP converter
④ Gas Sampling Pretreatment Systems
• Normal temperature high-humidity pretreatment system
• High-temperature and high-humidity pretreatment system
• High-temperature, high-humidity, and high-dust pretreatment system
