FDM-CH4 Combustible Gas Device

· Various signal outputs: with standard current 4~20mA, low limit alarm relay output and standard RS485 interface.
· Automatic identification of sensors and real-time detection of air chamber working conditions.
· Compatible with various remote control equipment: PLC, DCS, control alarm, secondary instrument, etc.
· Full-scale temperature digital compensation to ensure measurement accuracy.
· OLED display, remote control operation, high decibel sound and light alarm (optional), full range of alarm points adjustable.

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Product serial number

Category

Industrial Gas Leakage Safety Alarm

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产品描述

Parameters

Product Overview

FDM Combustible Gas Device is a high-performance product with built-in MCU, OLED display, remote control operation, high-quality catalytic combustion sensor, combined with advanced digital processing technology, which can continuously and comprehensively detect combustible gases in indoor and outdoor environments. Monitor, and output the monitoring signal to the gas alarm controller or other signal acquisition equipment. The device can also be easily connected to other secondary instruments and control systems. The shell is made of cast aluminum alloy, and the surface is painted, which is waterproof, dustproof, and corrosion-resistant, and can meet the requirements of various environments. Widely used in petroleum, chemical, metallurgy, refining, gas transmission and distribution, biochemical medicine and other fields. (This product implements the national standard GB15322.1-2019 point-type combustible gas detector for industrial and commercial purposes)

Principle

The principle of catalytic combustion detection. The principle is the structure of a Wheatstone bridge.Its measuring bridge is coated with a catalytic substance, which is not consumed during the entire measuring process. Even when the concentration of gas and vapor in the air is much lower than that of LEL, they will have catalytic combustion reaction on this bridge. During measurement, a voltage should be applied to the reference and measuring bridges to heat them to cause a catalytic reaction. The temperature is about 500°C or higher. Normally, the bridge is balanced, V1=V2, and the output is zero. If there is a flammable gas, its oxidation process will heat the measuring bridge and increase the temperature, while the reference bridge temperature remains unchanged. The circuit will measure the resistance change between them, V2>V1, and the output voltage is proportional to the concentration of the gas to be measured.

Specification

Gas	Methane
Range	3 - 100% LEL
Level 1 Alarm Value	25% LEL (factory default value, can be set)
Level 2 Alarm Value	50% LEL (factory default value, can be set)
Principle	Catalytic combustion
Method	On-line monitoring, diffusion type
T90 Response Time	< 15s
Output	Simultaneous output of 4- 20mA and RS485 signals
	3-wire 4- 20mA output connection cable: 3-core shielded cable
	4-wire RS485 output connection cable: 4-core shielded cable
Housing Material	Cast aluminium
Accuracy	± 5% F.S.
Working Temperature	(-10~+55)℃
Working Humidity	(15~95)% RH non-condensing
Expected Lifetime	3 years
Operating Voltage	Rated working voltage 24VDC (18~28VDC)
Operating Current	Static 40mA@24VDC; Maximum 100mA@24VDC
Relay Output	Passive switching output or active output (contact capacity 24VDC@1A when active output)
Weight	2.85 kg

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FDM-CH4S Methyl Mercaptan Device

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SOLUTION

From 23 to 25 March 2021, EC Sense participated in the National Affiliate Center in Shanghai

From March 23 to 25, 2021, EC Sense participated in the AWE2021 China Home Appliances and Consumer Electronics Expo held at the Shanghai National Association Center.This AWE exhibition will cover six venues in the National Convention and Exhibition Center, presenting innovative products and technical solutions in the past two years. The exhibition categories will cover traditional home appliances and consumer electronics manufacturing industry, smart home, smart technology, 3C digital, core parts and so on

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Six venues will be built in the National Convention and Exhibition Center for this AWE Expo

At the EC Sense booth, you can also see our products on display, which focus on the full range of gas monitoring for intelligent living in human settlements.New EC Sense product -DGM10 dual gas module intelligent algorithm design, sensor performance and life determination signal output

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AWE2021 China Home Appliances and Consumer Electronics Expo held by Shanghai National Association Center

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