1. Product Overview
The SGA-700C is an integrated pump-suction intelligent gas sensor module released in 2018, featuring up-down air inlet structure. Built-in air pump realizes active gas extraction, and the optimized air channel is airtight and leak-proof to ensure smooth air intake. The product supports 5-pin and 7-pin versions, retains high-precision detection capability and factory pre-calibration. It is compatible with multiple sensing principles and provides dual standard signals plus optional 4-20mA output. With IP55 protection and intrinsically safe design, it is specially used for confined spaces, vertical pipelines and scenarios requiring active gas sampling.
2. Sensing Technology & Self-Cleaning System
This module integrates an air pump to realize active gas sampling, and matches electrochemical, catalytic combustion, infrared, PID and other sensing technologies for different gases. Gas is pumped into the sealed sampling chamber through the vertical up-down air channel. Internal circuits complete signal amplification, temperature & humidity compensation and digital processing. There is no active self-cleaning function. The fully sealed air channel and shell block dust and sundries. The smooth flow channel reduces dirt adhesion, so the module only needs regular external inspection and simple cleaning in daily use.
3. Key Features & Competitive Advantages
Built-in integrated air pump realizes active gas suction, suitable for confined spaces and closed pipelines where diffusion sampling cannot work. The vertical up-down air inlet and optimized air channel ensure smooth air flow and complete air tightness without leakage. 5-pin and 7-pin dual pin designs are optional to adapt to different wiring and host equipment requirements. It has ppb-level high detection precision for trace gas monitoring. It supports standard dual signals and optional 4-20mA current output for flexible system integration. Factory pre-calibration enables plug and play and saves deployment time. The compact structure is easy for vertical installation. IP55 protection and intrinsically safe design ensure safe operation in industrial and explosive environments.
4. Technical Specifications
| Parameter |
Specification |
| Product Type |
Integrated Pump-suction Type (Up-Down Ventilation) |
| Release Year |
2018 |
| Pin Count |
5 pins / 7 pins (Optional) |
| Diameter |
33.5 mm |
| Height |
49 mm |
| Pin Length |
3.5 mm (7-pin) / 5.5 mm (5-pin) |
| Pin Diameter |
1 mm (7-pin) / 1.5 mm (5-pin) |
| Surface Treatment |
Electroplate |
| Weight |
45 g |
| Detectable Gases |
Over 1000 kinds of combustible, toxic, volatile gases |
| Detection Principle |
Electrochemical, Catalytic Combustion, Infrared, PID, Semiconductor |
| Working Voltage |
5V ± 1% |
| Power Consumption |
Electrochemical: < 50 mA; Others: < 100 mA |
| Accuracy |
≤ ±3% F.S. |
| Resolution |
ppb-level |
| Response Time (T90) |
≤ 30 s |
| Repeatability |
≤ ±2% F.S. |
| Linear Error |
≤ ±2% F.S. |
| Zero Drift |
≤ ±1% F.S./Year |
| Working Temperature |
-20 °C ~ +50 °C |
| Working Humidity |
≤ 95% RH, non-condensing |
| Working Pressure |
86 ~ 106 KPa |
| Preheating Time |
30 s |
| Communication Parameter |
9600 bps, 8 data bits, 1 stop bit, no parity |
| Shell Material |
Aluminum Alloy |
| Protection Class |
IP55 |
| Explosion-proof Grade |
Intrinsically Safe |
| Standard Output |
0-5V Voltage + TTL Digital Signal |
| Optional Output |
24V 4-20mA Current Signal |
5. Applications
Suitable for closed pipeline gas sampling and monitoring, tunnel and underground confined space gas detection, flue gas extraction and analysis systems, sewage plant & landfill gas monitoring, and various active sampling gas detection equipment.