SGA-400A Intelligent Gas Sensor Module

The SGA-400A is the basic subminiature diffusion-type module of Singoan SGA series, released in 2015. It integrates imported high-performance gas sensors, signal processing circuits and temperature & humidity compensation units. Factory full calibration eliminates secondary calibration work for users. With unified 7-pin pinout and dual output signals, this ultra-compact module supports multiple detection principles and more than 1000 kinds of combustible, toxic and volatile gases. Featuring aluminum alloy housing, IP55 protection and intrinsically safe design, it is designed for general industrial and civil embedded gas monitoring scenarios with limited installation space.

This module applies multiple mature gas sensing technologies including electrochemical, catalytic combustion, infrared, PID, MOS and semiconductor according to different detected gases. It adopts natural diffusion air intake structure, where ambient gas enters the internal sampling chamber spontaneously. The built-in signal amplification, filtering and temperature/humidity compensation circuits process raw signals stably. There is no active self-cleaning system. The smooth structural design and sealed enclosure reduce dust and moisture accumulation, lowering daily maintenance frequency in ordinary outdoor and indoor environments.

It features ultra-small size and light weight, which is perfectly suitable for equipment with narrow installation space. The module is fully calibrated at factory, enabling plug-and-play operation without on-site adjustment and secondary development. The standard 7-pin unified interface realizes universal compatibility and easy replacement among matched devices. It provides 0-5V analog voltage and TTL dual digital signals for flexible system integration. Built-in temperature and humidity compensation effectively suppress measurement drift under changing ambient conditions. It supports a full range of mainstream gas detection principles to meet diverse gas monitoring demands. With IP55 ingress protection and intrinsically safe circuit design, it can work reliably in conventional explosive and industrial sites. Low power consumption makes it applicable to battery-powered portable and remote monitoring terminals.

Applied to portable handheld gas detectors, miniature embedded monitoring equipment, indoor air quality monitors, small industrial gas alarm devices, civil gas alarm products and low-power remote gas monitoring terminals.