SGA-400B Intelligent Gas Sensor Module

The SGA-400B is an upgraded version based on SGA-400A, released in 2018 as a subminiature diffusion-type intelligent gas sensor module. It optimizes internal circuit structure to improve overall measurement accuracy and operational stability. The product adopts a simplified 5-pin interface for simpler wiring and assembly. It retains natural diffusion sampling, factory pre-calibration and plug-and-play characteristics, and is compatible with multiple gas detection principles covering more than 1000 gas types. The electroplated surface and pins enhance anti-corrosion performance. With IP55 protection and intrinsically safe design, it is more suitable for mass production and large-scale embedded gas monitoring projects.

This module adopts mainstream gas sensing technologies such as electrochemical, catalytic combustion, infrared and PID according to different monitoring gases. Natural diffusion mode is used for gas sampling, and external gas spontaneously enters the internal sampling chamber. The upgraded signal processing circuit and temperature & humidity compensation unit ensure stable signal output. There is no active self-cleaning function. The fully sealed aluminum alloy shell effectively blocks dust and moisture, and the optimized external structure reduces dirt adhesion, so the module only needs simple regular maintenance in daily use.

It adopts upgraded circuit design to effectively promote measurement accuracy and long-term operational stability. The 5-pin simplified interface simplifies wiring steps and lowers assembly difficulty for mass production. As a diffusion-type module, it needs no additional air pump and features simple structure and low failure rate. Factory pre-calibration allows direct use after installation without on-site calibration or secondary development. It provides 0-5V voltage and TTL dual signals to adapt to various host systems. Electroplated shell and pins improve anti-oxidation and anti-corrosion ability. IP55 protection adapts to indoor and general outdoor working environments. Intrinsically safe circuit design makes it applicable to explosive industrial areas. The overall size is compact to meet the layout requirements of small equipment.

Suitable for mass-produced portable gas detectors, embedded air quality monitoring devices, commercial gas alarm systems, industrial workshop gas safety monitors, intelligent building environmental sensors and low-power remote monitoring terminals.