Product Overview
The SX-GMFA Series is a four-channel gas sensor module carrier designed to accommodate four SXGMKA-series gas sensor modules simultaneously. An internal analog switch alternately communicates with the installed modules, enabling one device to monitor up to four different gas types. Communication is provided via TTL-level UART / Modbus-RTU. The module carrier uses a high-strength aluminum-alloy housing, and the wiring entry is sealed with epoxy resin to help ensure gas-tightness. Typical applications include gas alarm instruments, industrial gas detection, mine gas detection, ambient air-quality monitoring, and research or academic applications.
Main Features
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Standardized connects to a wide range of SX-GMKA series gas sensor modules
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Output terminal: 2.0 mm pitch, 6-pin (default); customizable
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Factory-calibrated and ready to use; no additional calibration or secondary development required
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Output signal uses UART (TTL-level) protocol
- UART (TTL-level) communication with Modbus RTU protocol
- Compatible with infrared, electrochemical, catalytic, and
other sensor types -
High accuracy, fast and stable response
- Short warm-up time, low power consumption, high resistance to interference
Product Application
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Smart public-restroom gas
detection
|
Smart agriculture gas detection
|
|
|
Smart manhole-cover gas
detection
|
Highway / road tunnel gas detection
projects |
Smart livestock-farming gas
detection
|
|
Smart-granary gas detection projects
|
Underground parking-garage gas
detection
projects
|
|
|
Industrial intelligent gas detection
projects (e.g. inspection robots)
|
Automotive electronics, smart fire safety, and test & measurement
instruments
|
|
Technical Data
| Measurement | |
| Model | SX-GMFA Series |
| Product Type | Four-in-one gas sensor module carrier |
| Module Capacity | Four SX-GMKA-series gas sensor modules |
| Detection Method | Natural diffusion |
| Detection Gas | Depends on the installed SX-GMKA sensor modules |
| Detection Range | Depends on the target gas and selected sensor modules |
| Sensor Technologies | Electrochemical / Catalytic combustion / Semiconductor / Infrared / Photoionization (PID) / Thermal conductivity |
| Warm-Up Time | 30–60 s |
| Communication & Output | |
| Communication Protocol | Modbus RTU |
| Digital Output | UART, TTL level |
| Output Type | Multiplexed digital concentration output from four sensor modules |
| Baud Rate | 9600 bps |
| Data Format | 8 data bits, 1 stop bit, no parity |
| Default Modbus Address | 0xFF |
| Module Communication Address | 0–254, configurable |
| Connector & Wiring | |
| Connector | 6-pin terminal connector, customizable |
| Connector Pitch | 2.0 mm |
| Stability & Service Life | |
| Electrochemical Sensor Life | 2 years |
| Infrared Sensor Life | 5 years |
| Semiconductor Sensor Life | 5 years |
| Catalytic-Combustion Sensor Life | 2 years |
| Calibration | Factory-calibrated; supports up to six calibration points |
| Power | |
| Supply Voltage | 5–24 V DC |
| Maximum Input Voltage | 36 V DC |
| Power Consumption | ≤ 2 W |
| Environmental Conditions | |
| Operating Temperature | −20°C to +50°C |
| Operating Humidity | 10%–95% RH, non-condensing |
| Mechanical Data | |
| Housing Material | High-strength aluminum alloy |
| Housing Form | Round sleeve / cartridge |
| Overall Dimensions | Ø75 × 77.5 mm |
| Weight | <600 g |
| Cable Entry | Epoxy-resin sealed for improved gas tightness |
Certifications & Compliance
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