ShanXi Teng Xing MQ-K4B Combustible Gas Sensor User Manual

This manual provides usage instructions, technical specifications, and precautions for the ShanXi Teng Xing MQ-K4B combustible gas sensor.

ShanXi Teng Xing MQ-K4B Combustible Gas Sensor User Manual - cover page
Brand
ShanXi Teng Xing
Category
Other Electronics
Document type
User Manual
Language
Chinese
Pages
7
File format
PDF
File size
1.5 MB
Published
07 November, 2026
Updated
07 November, 2026
MD5 checksum
176B81C92BC03F965B4184E8EF13BF37
PDF
ShanXi Teng Xing MQ-K4B Combustible Gas Sensor User Manual PDF

About this manual

The ShanXi Teng Xing MQ-K4B is a semiconductor gas sensor designed for detecting methane. It operates by measuring changes in electrical conductivity when exposed to combustible gases, utilizing a tin dioxide (SnO2) sensing material. The device is suitable for use in home gas leak alarms, industrial combustible gas alarms, and portable gas detectors. This manual is written in Chinese.

What's inside

  • Product Characteristics
  • Applicable Scope
  • Technical Specifications
  • Basic Circuit
  • Sensor Characteristics
  • Precautions
  • Welding Conditions
  • Storage and Aging

Specifications

Detection GasMethane
Detection Concentration300～10000ppm
Circuit Voltage≤24V DC
Heating Voltage5.0V±0.1V AC or DC
Heating Resistance27Ω±3Ω
Heating Power≤900mW
Sensitivity≥5
Output Voltage2.5V～4.0V

Frequently asked questions

What gases can the MQ-K4B sensor detect?

The MQ-K4B sensor is designed to detect methane.

What is the recommended preheating time for the sensor?

The sensor requires a preheating time of no less than 48 hours.

What are the ideal welding conditions for the sensor?

The ideal welding method is manual soldering with a temperature of 250°C for no more than 3 seconds.

How should the sensor be stored for long periods?

The sensor should be stored in a sealed bag without volatile silicon compounds.

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