SKU: SENS-0243
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Generic MP-135 Air Quality Detection Gas Sensor Module - Analog Output

₹229.00 (Inclusive of all taxes)
Out of Stock

The MP-135 is a metal oxide semiconductor (MOS) air quality sensor module designed for easy integration with 5V microcontrollers like Arduino and ESP32. It provides an analog voltage output proportional to the concentration of various volatile organic compounds (VOCs) including alcohol, smoke, isobutane, and formaldehyde.

Features

  • Detects multiple VOCs: Alcohol, Smoke, Isobutane, Formaldehyde
  • Analog voltage output for direct ADC connection
  • 5V DC operating voltage compatible with Arduino/Raspberry Pi
  • Metal oxide semiconductor (MOS) sensing element in a protective metal shell
  • Requires a brief 20-30 second preheat cycle for stable readings

Out of stock

Description

The MP-135 gas sensor module utilizes a metal oxide semiconductor (MOS) sensing layer deposited on a micro alumina ceramic substrate. When the integrated heater brings the sensing element to its optimal operating temperature, the presence of target gases alters the semiconductor’s conductivity. This change in resistance is converted into a corresponding analog voltage signal by the onboard circuit.

Housed in a durable metal enclosure, the sensor is designed for stable performance in indoor environments. Its simple analog interface allows for straightforward connection to the analog input pins of most microcontrollers, making it suitable for air quality monitoring projects, smart home systems, and educational demonstrations.

Key Features

  • Multi-Gas Detection: Sensitive to a range of volatile organic compounds (VOCs) including alcohol, smoke, isobutane, and formaldehyde.
  • Analog Interface: Provides a 0-5V analog output signal directly proportional to gas concentration for easy microcontroller integration.
  • Robust Construction: Features a metal oxide sensing element housed in a protective metal shell for durability and stable long-term operation.
  • Low Power Design: Operates from a standard 5V DC supply, making it suitable for battery-powered or USB-powered applications.
  • Fast Response Dynamics: Offers quick response and recovery times to changes in gas concentration levels.

Applications

  • Indoor Air Quality (IAQ) monitors for homes, offices, and schools.
  • Portable breathalyzer or alcohol detection prototypes.
  • Smoke and combustible gas leak detection in DIY safety systems.
  • VOC level monitoring in smart home ventilation control systems.
  • Educational kits for learning about gas sensing and analog signal processing.

Technical Specifications

Model NumberMP-135
Sensor TypeMetal Oxide Semiconductor (MOS) Air Quality Sensor
Detection GasesAlcohol, Smoke, Isobutane, Formaldehyde
Operating Voltage5V DC
Output SignalAnalog Voltage
Preheat TimeApprox. 20–30 seconds
Operating Temperature-10°C to +50°C
Dimensions (L x W)21 mm x 13.2 mm
Weight2 g

Frequently Asked Questions

What gases does the MP-135 sensor detect?

The MP-135 is sensitive to a range of volatile organic compounds (VOCs), specifically alcohol (ethanol), smoke, isobutane, and formaldehyde. It provides a general air quality indication based on the concentration of these gases, but is not a selective sensor for any single gas.

How do I connect and read data from the MP-135 module?

Connect the module's VCC and GND pins to a 5V DC power supply. The analog output (AO) pin provides a voltage signal (typically 0-5V) that varies with gas concentration. Connect this pin to an analog-to-digital converter (ADC) input on a microcontroller like an Arduino or ESP32. You must allow a 20-30 second preheat period after power-on for the readings to stabilize.

What is the purpose of the preheat time, and is it required for every use?

The preheat time (20-30 seconds) is required to bring the internal metal oxide semiconductor sensing element to its optimal operating temperature. This heater cycle is necessary for the sensor to achieve stable and accurate baseline readings. It is recommended to allow this preheat period after initial power-up or after any prolonged period of inactivity.

Package Includes

  • 1 x MP-135 Air Quality Detection Gas Sensor Module

Additional Information

Weight 0.002 kg
Dimensions 2.1 × 1.32 cm