What is 4 in 1 gas detector?

4 in 1 gas detector for multi gas

4 in 1 gas detector ( RS-MG41-1) is an intrinsically safe composite detector developed by our company for environments containing explosive or toxic gases. The gas detector uses a natural diffusion method to detect the gas and an electrochemical combustion gas sensor. It has excellent sensitivity and excellent repeatability. The product can detect four gases: oxygen, flammable gas, carbon monoxide, and hydrogen sulfide. 

portable multi gas detector features:

1. The 4 gas detector uses electrochemical and catalytic combustion sensors with excellent sensitivity and repeatability

2. The 4 in 1 gas detector shell has high strength and belongs to intrinsically safe explosion-proof products.

3. High-definition color screen design, easy to check the gas status

4. The 4 in 1 gas detector can detect four gases: oxygen, flammable gas, carbon monoxide, and hydrogen sulfide

5.Can set high and low limit alarm value

6. Full-featured self-test, the product adopts sound-light vibration three-level alarm

7. Shortcut key to quickly turn on and off audible alarm and storage mode

8. Up to 130,000 stored data, with the software to view historical data at any time

9. Large-capacity battery, the device can be used continuously for at least 8 hours in the constant light mode


Detection GasCOH2SEXO2
Range0-1000 ppm0-100ppm0-100% LEL0-30.0%VOL
Test content70/300/700 ppm20/50/80ppm10%/40%/60%LEL5%/15%/25%VOL

Indication error

Absolute error:±5ppm


    ±5 ppm



Relative error:±10%
Duplicate value≤2%≤2%≤2%≤1%
Zero drift±3ppm±5ppm±2%FS±1%
Span drift±5%±5ppm±3%FS±1%
Alarm value50/150ppm10/35ppm20/50%LEL19.5/23.5%VOL
Response timeDiffuse≤60S
Alarm functioSound, light, vibration
Operating tempTemperature -10 ℃ -50 ℃; humidity <95% RH without condensation
Operating VolDC3.7V (3000mAh lithium battery capacity)
Explosion-proof markEx ib IIB T3 Gb
Charging time6h-8h
Standby timeMore than 8h continuous


The 4 in 1 gas detector is easy to use and maintain and meets the requirements of industrial site safety monitoring for high reliability of the equipment. The housing is made of high-strength engineering plastics and composite non-slip rubber, which has high strength and good feel and is waterproof, dustproof, and explosion-proof.

This four gas detector is widely used in petroleum, chemical, environmental protection, metallurgy, refining and chemical, gas transmission and distribution, biochemical medicine, agriculture, and other industries.