The SFD-300Ⅱ series of flammable/toxic gas alarm devices is a high-tech product developed and produced by Shenzhen Suofuda Electronics Co., Ltd. This device is widely used in the industrial safety field and can detect various flammable and toxic gases in real-time, playing an important role in protecting enterprise property and worker safety.
The SUOFUDA SFD-300II gas alarm unit is designed for detecting combustible and toxic gases in industrial environments such as petrochemical plants, oil fields, and warehouses. It offers explosion‑proof protection and can be configured for a wide range of gases.
The document covers product overview, component identification, installation dimensions, wiring diagrams, safety standards, technical specifications, and troubleshooting guidance, enabling users to correctly install, configure, and maintain the system. This manual is written in Chinese.
| Output signal | 4‑20 mA analog, first and second stage digital contacts |
|---|---|
| Explosion protection level | ExibILCT3 |
| Ingress protection rating | IP65 |
| Detection method | Diffusion type |
| Wall‑mount unit weight | ≈12 kg (6‑channel) |
| Panel‑mount unit weight | ≈2.5 kg per channel |
| Measurement range | 0‑100 % LEL for combustible gases |
The detector’s sensing opening must face downward when installed.
It provides a 4‑20 mA analog signal and two‑stage digital contacts for alarm indication.
The first “X” denotes the type of gas the unit is configured to detect.