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 on, operates by converting detected gas leakage into corresponding voltage signals via sensors. These voltage 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 equipment.
A gas alarm is a fixed instrument that continuously monitors the concentration of oxygen or toxic, harmful, flammable, and explosive gases in the working environment.
The gas alarm employs a diffusion method to convert the gas concentration signal at the monitoring point into an electrical signal in real time. This signal is amplified and then 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 issued.
The gas alarm features a dual-chamber design, specialized imported sensors, and modular sensor construction for easier calibration and adjustment. It offers superior performance, 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 2 hazardous areas in industrial settings;
Optional LCD concentration display for real-time on-site concentration monitoring;
Optional dedicated explosion-proof sound and light alarm for on-site audible and visual alerts;
Meets any range requirement between 1-99999 and 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 ensures stable product performance;
Sensors use imported gas-sensitive components, offering high accuracy, long lifespan, minimal zero drift, fast response time, continuous long-term operation, compact size, easy operation, and strong anti-poisoning performance;
Allows adjustment of alarm points, zero points, and target point calibration via controller without opening the cover;
Suitable for detecting dozens of gases and displaying gas names; Gas unit names: ppm, LEL%, VOL%, mg/m3;
International standard (4–20)mA signal can be directly connected to factory DCS systems; RS485 digital signal interfaces with factory host computers.