Introduction
A gas alarm is an explosion-proof safety device capable of rapid, reliable, and stable continuous detection of gas concentration in industrial production. When the detected gas concentration reaches the preset alarm value, the alarm triggers and drives external equipment to alert on-site personnel to take necessary protective measures, thereby preventing combustion accidents caused by gas leaks.
Working Principle of Gas Alarm: The alarm, installed on-site and powered, operates by converting detected gas leakage into corresponding voltage signals via sensors. These signals are processed by the alarm, uploaded as data, and displayed on the screen. When the concentration reaches the set action value, the alarm activates and drives external devices.
A gas alarm is a fixed instrument that continuously monitors oxygen concentration or the presence of toxic, harmful, flammable, or explosive gases in the working environment.
The gas alarm employs a diffusion method, converting gas concentration signals at monitoring points into electrical signals in real-time. These signals are amplified and processed by the CPU through AD sampling, temperature compensation, and intelligent calculation. If the measured value exceeds the set alarm concentration, an alarm signal is triggered.
The gas alarm features a dual-chamber design, specialized imported sensors, and modular sensor architecture for easier calibration and superior performance. It offers high stability, multiple signal outputs, and convenient installation and maintenance, meeting the high reliability requirements of industrial sites.

Features
Ingenious structural design for extremely simple installation;
Flexible setting of upper and lower alarm points across the full range;
Explosion-proof design suitable for Zone 1 and Zone 2 hazardous areas in industrial settings;
Optional LCD concentration display for real-time on-site monitoring;
Optional dedicated explosion-proof sound and light alarm for on-site audio-visual alerts;
Customizable range from 1 to 99999 to meet all gas detection needs;
Two sets of normally open passive contact outputs for controlling fans or solenoid valve AC contactors;
Sophisticated power supply design with pure SMT component assembly ensuring stable product performance;
Imported gas-sensitive sensors provide high accuracy, long lifespan, minimal zero drift, fast response time, continuous long-term operation, compact size, easy operation, and strong anti-poisoning performance;
Allows alarm point adjustment, zero adjustment, and target point calibration via controller without opening the cover;
Suitable for detecting dozens of gases with display of gas names; Gas unit names: ppm, LEL%, VOL%, mg/m3;
International standard (4–20)mA signal可直接接入工廠DCS系統(tǒng)，RS485 digital signal connects to factory host computer.