MP-4 Air Quality Detection Gas Sensor Module

Product Description

The MP-4 Air Quality Detection Gas Sensor Module is a metal oxide semiconductor (MOS) gas sensing device designed for detecting changes in air quality caused by smoke, propane, and other combustible gases. It uses multilayer thick-film manufacturing technology with a gas-sensitive semiconductor layer mounted on a ceramic substrate with an integrated heater.

The sensor detects gases by monitoring changes in the electrical conductivity of its sensing material. As the concentration of detectable gas increases, the sensor’s conductivity changes, which can be converted into an electrical signal using a suitable external circuit.

With high sensitivity, fast response and recovery, low power consumption, compact construction, and long service life, the MP-4 is suitable for air-quality monitoring, gas detection, safety systems, and embedded electronics projects in residential and industrial environments.

Features

• Multilayer thick-film manufacturing technology
• Metal oxide semiconductor (MOS) gas-sensitive layer
• High sensitivity to smoke, propane, and combustible gases
• Fast response and recovery
• Low power consumption
• Long operational life
• Compact size
• Durable protective metal casing
• Integrated heater
• Simple circuitry for easy integration
• Anti-interference characteristics for stable detection
• Suitable for residential and industrial air-quality monitoring
• RoHS-compliant product information provided by the supplier

Specifications

Note: Specific electrical values such as operating voltage, heater resistance, heater current, sensor resistance range, detection concentration range, and pinout were not provided in the supplied product information and should be verified from the manufacturer’s datasheet before circuit design.

Working Principle

The MP-4 uses a metal oxide semiconductor gas-sensitive layer. When the sensor is exposed to certain gases, the interaction between the gas molecules and the sensing material causes a change in its electrical conductivity.

The sensor’s integrated heater maintains the sensing element at the required operating condition. As the concentration of detectable gas changes, the sensor’s conductivity changes accordingly.

An external circuit can measure this change and convert it into an electrical signal that can be processed by a microcontroller, monitoring system, alarm circuit, or other electronic equipment.

Sensing Technology

The sensor uses multilayer thick-film technology and a MOS gas-sensitive layer deposited on a ceramic substrate. The integrated heater supports the operating conditions required by the sensing material.

The protective metal housing helps provide a durable structure while allowing the sensing element to interact with the surrounding air.

Gas Detection

The MP-4 is described as having high sensitivity to:

• Smoke
• Propane
• Combustible gases

The sensor can respond to changes in gas concentration through changes in electrical conductivity. Its response should therefore be interpreted using an appropriate circuit and calibration method for the intended application.

Applications

The MP-4 can be used in:

• Air-quality monitoring
• Smoke detection systems
• Combustible gas detection
• Propane detection
• Gas alarm projects
• Residential monitoring systems
• Industrial monitoring
• Environmental monitoring
• Safety and protection systems
• Arduino and microcontroller projects
• IoT gas-monitoring projects
• Embedded gas-sensing applications
• Educational electronics projects

Interface and Integration

The MP-4 can be incorporated into an electronic sensing circuit where changes in the sensor’s electrical characteristics are measured and converted into a usable signal.

For microcontroller-based applications, an appropriate signal-conditioning or measurement circuit may be required depending on the desired output and the electrical characteristics of the exact MP-4 version.

Package Includes

• 1 × MP-4 Air Quality Detection Gas Sensor Module
• 1 × Header Pin

Product Disclaimer

• The MP-4 is a gas-sensing component/module, not a certified standalone life-safety gas alarm unless the complete finished system has the required certification.
• Gas sensors can be affected by temperature, humidity, airflow, other gases, and environmental conditions.
• Proper calibration and application-specific testing are recommended for reliable gas detection.
• The supplied information does not specify exact detection limits or concentration accuracy for individual gases.
• Always verify the operating voltage, heater requirements, pin configuration, and electrical specifications from the manufacturer’s documentation before use.
• Do not rely on this sensor alone for critical gas-leak or life-safety protection.
• The supplier information mentions RoHS compliance and EPR packaging certifications; these should be verified against the exact product documentation where certification is required.
• Product images are for illustration and representation purposes only. The actual product may slightly differ in appearance, colour, design, or component placement from the images shown due to manufacturing variations and production batches.