Introduction

A gas alarm is an explosion-proof safety device capable of performing rapid, reliable, and stable continuous monitoring of gas concentration in industrial production. When the detected gas concentration reaches the preset alarm value, the alarm activates 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 the Gas Alarm: The alarm is powered and operational when installed on-site. In the event of a gas leak, the sensor converts the detected leakage amount into a corresponding voltage signal. This voltage signal is processed by the alarm, which then uploads the data and displays it on the screen. When the concentration reaches the set activation value, the alarm triggers and drives external equipment.

The gas alarm is a fixed instrument designed for continuous monitoring of oxygen concentration or toxic, harmful, flammable, and explosive gases in the working environment.

Using a diffusion method, the gas alarm converts 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 specialized imported sensors with a modular structure, 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 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 99,999 to meet all gas detection needs;

Two sets of normally open passive contact outputs for controlling fans or AC contactors of solenoid valves;

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, ease of use, and strong anti-poisoning performance;

Allows adjustment of alarm points, zero points, and target calibration via the controller without opening the cover;

Compatible with dozens of gas types and displays gas names; units include ppm, LEL%, VOL%, and mg/m3;

Standard (4–20)mA signal for direct connection to plant DCS systems; RS485 digital signal for connection to host computers.