NFW-202 Series Toxic and Hazardous Gas Detector
The NFW-202 Series toxic and hazardous gas detector is designed for continuous monitoring of toxic gas risks in industrial environments. It provides reliable detection, local alarm indication and real-time concentration display to support safe plant operation.
Product Overview
▅ Product Features
1. Supports multiple interfaces and communication methods S-BUS, 4-20mA, FFBUS;
2. Infrared remote control control, no need to open the cover for on-site operation;
3. Three independent indicator lights, indicating equipment normality/fault/alarm;
4. Comes with linkage control output, which can control on-site sound and light or fans/valves;
5. Double outlet structure, convenient for on-site construction;
6. Built-in temperature detection function to ensure accurate and effective detection of products in various temperature environments;
7. Alarm self-diagnosis function;
8. The system has strong plasticity and supports multiple interfaces and external expansion;
9. With the independent sensor module, users can simply replace the sensor module to extend product life or conduct off-site calibration testing as needed, avoiding the complexity of the disassembly process and the difficulty of on-site calibration, truly realizing plug-and-play
▅ Applicable scenarios
Petrochemicals, coking, steel, emergency rescue, gas, national defense, aviation, chemical industry, environmental protection, pharmaceuticals, papermaking, etc.
Performance Specifications
| Detect gas | SO2, O2, CO, HCL and other toxic and harmful gases |
| Detection principle | Electrochemical formula |
| Sampling method | diffusion |
| Measuring range | (0～100)%LEL |
| Alarm set value | (0～100)PPM or others (according to gas type) |
| Alarm error | ±3%F.S |
| response time | ≤30S (according to gas type) |
| Working voltage | 24VDC/three-wire system |
| Protection level | IP66 |
| Explosion-proof level | Exd IIC T6Gb |
| Signal transmission method | S-BUS、4-20mA、FFBUS |
| Signal transmission distance | ≤1500 meters |
| Usage environment | Temperature: -40℃～+60℃; relative humidity ≤93%RH; pressure 86kPa～106 kPa |
| Linkage output | 3 channels of passive switching signals, contact capacity 3A/AC250V or 3A/DC30V |