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Quick Details

  • Place of Origin: Henan, China (Mainland)
  • Brand Name: WINSEN
  • Model Number: MH-440D
  • Usage: Gas Sensor
  • Theory: Optical Sensor
  • Output: Digital Sensor
  • Optical sensor: gas sensor
  • Detection range: 0~5%vol(0~100%vol optional)

Packaging & Delivery

Packaging Details inner: foam, outside: carton
Delivery Time 5 days after your payment

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


Detection range

0~5%vol(0~100%vol optional)

Output signal range

0.4~2V dc



Warm-up time


Response time



Zero < ±100ppm

SPAN <±500ppm

Long-term drift

Zero < ±300ppm/month

SPAN < ±500ppm/month

Temperature range

-20°C ~50°C

Humidity range



>5 years







3. Model selection

This product has two types for your selection:


3 pins—It is same as pins of catalytic sensor, and the linear output supplied is familiar with the ones of catalytic.


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.




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