Explosion-proof Phosphine Gas Alarm

Introduction

A gas alarm is an explosion-proof safety device capable of performing rapid, reliable, and stable continuous detection of gas concentrations 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 gases.

Working principle of the gas alarm: The alarm is powered and operational when installed on-site. When a gas leak occurs, the sensor converts the detected leakage amount into a corresponding voltage signal output. This 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.

A 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 triggered.

The gas alarm features a dual-chamber design and uses specialized imported sensors. The sensors are modular in design, making calibration and adjustment more convenient. With superior performance, high stability, multiple signal outputs, and easy installation and maintenance, it meets the high reliability requirements of industrial sites.

Features

Ingenious structural design for extremely simple installation;

Freely set 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 sound and light 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 AC contactors of solenoid valves;

Elegant power supply design with pure SMT component assembly ensures stable product performance;

Sensors use imported gas-sensitive components, offering high precision, 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 the controller without opening the cover;

Suitable for detecting dozens of gases and displaying gas names; gas unit names include ppm, LEL%, VOL%, and 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;