1、 Introduction to Industrial Fixed Combustible Gas Transmitters

The BYG500 Ex industrial fixed combustible gas transmitter continuously detects combustible gases in the atmosphere online and provides sound and light alarms. It not only controls the concentration of gases in special occasions, but also has a warning effect on gas leaks in dangerous sites, timely protecting the safety of life and property on various sites. Instruments are widely used in industries such as petroleum, chemical, metallurgy, fire protection, coal mining, electricity, ships, environmental protection, telecommunications, and medical care. The BYG500 Ex combustible gas detector adopts imported sensors combined with high-speed and high-precision processing circuits, which have the advantages of stable signals, high accuracy, and good repeatability. It also adopts explosion-proof design and is suitable for various hazardous situations. The instrument outputs various standard signals and is compatible with various alarm systems, PLC, DCS and other control systems.

2、 Working principle of industrial fixed combustible gas transmitter

Catalytic combustion gas sensor utilizes the thermal effect principle of catalytic combustion, consisting of a detection element and a compensation element paired to form a measurement bridge. Under certain temperature conditions, combustible gas undergoes flameless combustion on the surface of the detection element carrier and the catalyst, causing the carrier temperature to rise. The platinum wire resistance inside it also increases accordingly, causing the balance bridge to lose balance and outputting an electrical signal proportional to the concentration of combustible gas. By measuring the magnitude of the resistance change of the platinum wire, the concentration of flammable gases can be determined. Mainly used for the detection of flammable gases, it has good output signal linearity, reliable index, low price, and will not cross infect with other non flammable gases.

3、 Characteristics of Industrial Fixed Combustible Gas Transmitters

1. Stable and reliable communication, wide range power supply DC12-24V;

2. Adopting various imported sensors with a minimum lifespan of 2-3 years or more;

3. Using high-speed and high-precision processing circuits to process sensor signals, with fast response speed, high measurement accuracy, good stability and repeatability;

4. The instrument comes with a backlit large screen display, which intuitively shows various parameters such as gas concentration, type, and unit;

5. The independent design of the gas chamber, combined with aerodynamics, enables faster and more accurate detection of target gases;

6. Full range temperature digital automatic tracking compensation ensures measurement accuracy;

7. Software calibration with button settings, simple and user-friendly operation;

8. Equipped with data recovery function, there is no need to worry about misoperation;

9 RS485、 The three wire 4-20mA output, relay output, and optional sound and light alarm fully realize the digitization and intelligence of the three wire gas transmitter;

10. The three explosion-proof buttons enable the transmitter to be freely configured on site, such as viewing, setting, and calibration;

11. The design of intrinsically safe circuits and explosion-proof enclosures ensures safe, convenient, and fast on-site maintenance.

4、 Technical parameters of industrial fixed combustible gas transmitter

Technical Parameter	BYG500-Ex
Detect gas	Flammable (Ex)
Detection Principle	Catalytic combustion type
measuring range	0-100%LEL
resolution	0.1%LEL
accuracy	≤±5%F.S
Sensor lifespan	About 3 years
Warm-up time	<3 minutes
sampling interval	3S
Response time (T90)	＜60S
Nonlinear	±1%
repeatability	±2%
Supply Voltage	DC 24V(12～30VDC)， The standard for a single device is a stable power supply of 24V, 1A, or greater than 1A
signal output	Three wire system 4-20mA, RS485 Modbus RTU (wireless network transmission methods such as GPRS, RF, WIFI can be customized according to customer needs)
Alarm method	A set of relay outputs（ 2A@30V ）Sound and light alarm (optional)
Display mode	Real time display on a 1.7-inch high-definition LCD screen, optional on-site display without display, or optional remote display, control, and alarm of gas alarm host
Installation method	Wall mounted, pipeline type (working pressure is atmospheric pressure ± 30%, pressure reduction is required if exceeding the pressure range), pump suction type
Shell material	Aluminum alloy explosion-proof shell
Explosion proof grade	ExdII CT6
protection grade	IP65
work environment	-20～50℃； 0-95% RH (no condensation)
Environment	-40～60℃； 0-100% RH (no condensation)
Weight/Size	1.5kg/ 125mm×106mm×153mm
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