Explosion-proof formaldehyde gas alarm

Introduction

A gas detector is a flameproof safety device capable of rapidly, reliably, stably and continuously detecting gas concentration in industrial production. When the detected gas concentration reaches the preset alarm value of the gas detector, the detector will trigger an alarm and drive external equipment to remind on-site staff to take necessary protective measures, which can prevent gas-induced combustion accidents.

Working principle of the gas detector: The detector installed on-site operates with power supply. When a gas leak occurs, the sensor converts the detected leak amount into a corresponding voltage signal for output. After the voltage signal is processed by the detector, the data is uploaded and displayed on the screen. When the concentration reaches the set action value, the detector will trigger an alarm and drive external equipment.

A gas detector is a fixed instrument that can continuously detect the concentration of oxygen, toxic and harmful gases, or flammable and explosive gases in the working environment.

The gas detector adopts a diffusion method to real-time convert the gas concentration signal at the monitoring point into an electrical signal. After the signal is amplified, it undergoes A/D sampling, temperature compensation and intelligent calculation by the CPU to process the measurement result. If the measured value exceeds the set alarm concentration value, an alarm signal will be sent out.

The gas detector features a dual-chamber design, special imported sensors, and the sensors adopt a modular design, making calibration and adjustment more convenient. It has superior performance, high stability, can output multiple sets of signals, and is easy to install and maintain, meeting the high reliability requirements of industrial on-site equipment.

Features

Ingenious structural design, extremely easy to install;

Upper and lower alarm points can be set arbitrarily within the full range;

Flameproof design, suitable for hazardous locations in Zone 1 and Zone 2 of industrial plants;

The gas detector can be optionally equipped with a liquid crystal concentration display, which shows the concentration in real time on-site;

The gas detector can be optionally equipped with a special flameproof acoustic-optic alarm to realize on-site acoustic-optic alarm;

Meets customers' requirements for any range from 1 to 99999 and all gas detection needs;

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

Exquisite power supply design, pure SMT component surface mount technology, ensuring stable product performance;

The sensor uses imported gas-sensitive elements, with high precision, long service life, small zero drift, fast response time, can work continuously for a long time, has a small body, is easy to operate, and has good anti-poisoning performance;

The alarm point adjustment, zero adjustment and target point calibration of the transmitter can be performed through the controller without opening the cover;

Suitable for dozens of gas detections and can display gas names; Gas unit names: ppm, LEL%, VOL%, mg/m3;

International standard (4～20)mA signal can be directly connected to the industrial DCS system, and RS485 digital signal is connected to the industrial host computer;

Accuracy

±2%FS (high-precision type), ±5%FS (standard type)

Weight

1.5Kg

Warranty Period

12 months

Output Signal

4-20mA/RS485/Passive Switch Quantity

Flameproof Type

Intrinsically safe type

Flameproof Mark

Ex d II C T6 Gb

Working Voltage

DC12-24V±1%

Dimension Specification

140mm (length) × 164mm (width) × 75mm (height)

Housing Material

Stainless steel / Aluminum alloy

Diffusion type or Pipeline type

Temperature Grade

-40℃~+65℃ (standard type) / -40℃~+70℃ (extreme type)

Humidity Grade

15~95% RH (no condensation)

Ambient Pressure

86kPa ~106kPa

Service Life

More than 3 years