Introduction
A gas alarm is an explosion-proof safety device capable of fast, 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 devices to alert on-site personnel to take necessary protective measures, thereby preventing combustion accidents caused by gas leaks.
Working principle of the gas alarm: The alarm is powered and installed on-site. When a gas leak occurs, the sensor converts the detected leakage amount into a corresponding voltage signal output. The voltage signal is processed by the alarm, then the data is uploaded and displayed on the screen. When the concentration reaches the set action value, the alarm triggers and drives external devices.
The gas alarm is a fixed instrument that continuously detects the concentration of oxygen or toxic, harmful, flammable, and explosive gases in the working environment.
The gas alarm uses 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 and uses specialized imported sensors with a modular design, making calibration and adjustment more convenient. It offers superior performance, high stability, multiple signal outputs, and easy 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 factory conditions;
Optional LCD concentration display for real-time on-site concentration monitoring;
Optional dedicated explosion-proof audible and visual alarm for on-site 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;
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 of the transmitter via the 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 the factory DCS system; RS485 digital signal can connect to the factory host computer.