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CH4 Infrared Gas Sensor
1. Introduction
MH-440V/D infrared gas sensor is a miniature universal intelligent sensor, which adopts NDIR theory to detect concentration of CH4 in air and has good selectivity, stable performance, long life, also is independent of Oxygen. The inside temperature sensor could be used for temperature compensation. This miniature infrared gas sensor is developed by the tight integration of mature infrared absorbing gas detection technology, micro machine workout and superior circuit design.
It is convenient in use and also instead of catalytic component, widely used in various occasions with flammable and explosion hazard gas.
2. Features and main technical parameters
2.1 Features
High sensitivity
Standard output and signal output
Miniature figure
Fast response and resume
Temperature compensation
Good stability
Long life
Anti-vapor interference
Instantly convert catalytic theory meter into infrared detection meter
2.2 Main technical parameters
Working voltage | 3.5~5.5V dc |
Working current | 75~85mA |
Detection range | 0~5%vol(0~100%vol optional) |
Output signal range | 0.4~2V dc |
Resolution | 1%FSD |
Warm-up time | 90s |
Response time | T90<30s |
Repeatability | Zero < ±100ppm |
SPAN <±500ppm | |
Long-term drift | Zero < ±300ppm/month |
SPAN < ±500ppm/month | |
Temperature range | -20°C ~50°C |
Humidity range | 0~95%RH |
Lifetime | >5 years |
Dimension | 20*16.6 |
Weight | 15g |
3. Model selection
This product has two types for your selection:
MH-440V
3 pins—It is same as pins of catalytic sensor, and the linear output supplied is familiar with the ones of catalytic.
MH-440D
5 pins—The 3 pins of them are same as pins of catalytic sensor, and the other two pins are UART pins, which can communicate with circuit directly and offer more choices for users.
4 series infrared methane gas sensor