Introduction

A gas alarm is an explosion-proof safety device capable of performing rapid, reliable, stable, and 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 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 action value, the alarm activates and drives external devices.

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, converting 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 triggered.

The gas alarm features a dual-chamber design and uses specialized imported sensors with a modular structure, making calibration and adjustment more convenient. It offers superior performance, high stability, outputs multiple signal types, and is easy to install and maintain, 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 concentration monitoring;

Optional dedicated explosion-proof audible and visual alarm for on-site alerting;

Meets any range requirement between 1-99999 and 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 ensuring stable product performance;

Sensors use imported gas-sensitive components with high accuracy, long lifespan, minimal zero drift, fast response time, continuous long-term operation, compact size for easy handling, and strong anti-poisoning performance;

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

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

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