Winsen MP-3B Alcohol Gas Sensor Module - Semiconductor, Metal Cap

Name: Winsen MP-3B Alcohol Gas Sensor Module - Semiconductor, Metal Cap
Brand: Winsen
SKU: SENS-0888
Price: 279.00 INR
Availability: OutOfStock

₹279.00 (Inclusive of all taxes)

Out of Stock

The Winsen MP-3B is a semiconductor-based alcohol gas sensor module designed for breathalyzer and ethanol vapor detection applications. It operates on a simple drive circuit, converting changes in conductivity into a corresponding output signal for gas concentration measurement.

Features

Semiconductor sensing element with planar Al2O3 ceramic plate construction
Target gas: Alcohol (Ethanol) with a detecting range of 0-500 ppm
Low heater consumption ≤350mW for reduced power requirements
Metal cap encapsulation ensures durability and stable performance
Simple interface requiring only a basic voltage divider circuit for signal output

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Description

The Winsen MP-3B alcohol gas sensor employs a metal oxide semiconductor (MOS) sensing principle. Its construction features a miniature Al2O3 ceramic substrate coated with a sensitive material, a micro-heater, and electrodes, all housed within a protective metal cap. When exposed to alcohol vapor, the sensor’s conductivity increases proportionally with the gas concentration, allowing for detection through a straightforward external circuit.

This module is engineered for reliable performance in detecting ethanol steam, offering fast response and recovery times alongside excellent long-term stability. Its compact form factor and low power consumption make it suitable for integration into portable or fixed-point monitoring systems.

Key Features

Planar Semiconductor Design: Advanced flat-surface construction on a subminiature ceramic plate for consistent sensitivity.
Optimized for Alcohol Detection: Specifically tuned for ethanol (alcohol) gas with high selectivity.
Low Power Operation: Heater consumption is ≤350mW, enabling use in battery-powered devices.
Robust Metal Housing: Encapsulation in a metal base and cap provides mechanical protection and environmental shielding.
Simple Signal Conditioning: Outputs a resistance change that can be easily converted to a voltage signal with a basic circuit.
Fast Dynamic Response: Offers quick response to gas presence and rapid recovery for continuous monitoring.

Applications

Portable personal breathalyzers and alcohol screening devices
Fixed-point ethanol vapor monitoring in industrial or laboratory settings
Safety interlock systems to prevent operation of machinery by intoxicated personnel
Air quality monitoring for alcohol concentration in fermentation or chemical processes

Technical Specifications

Model Number	MP-3B
Sensor Type	Semiconductor (Metal Oxide)
Target Gas	Alcohol (Ethanol)
Detecting Range	0 - 500 ppm
Standard Encapsulation	Metal Cap
Heater Consumption	≤ 350 mW
Loop Voltage (Vc)	≤ 24V DC
Sensing Principle	Conductivity change of metal oxide semiconductor

Frequently Asked Questions

What is the operating voltage for the MP-3B sensor heater?

The MP-3B sensor's internal heater requires a voltage that results in a total power consumption of ≤350mW. The sensor's loop voltage (Vc) can be up to 24V DC, but the actual heater voltage must be calculated and supplied based on its resistance to stay within the power limit, typically using a constant voltage or current drive circuit.

How do I interface with the MP-3B sensor to get a reading?

The MP-3B outputs a change in resistance proportional to alcohol concentration. Interface it by placing the sensor in series with a load resistor to form a voltage divider circuit. The voltage across the load resistor will vary with sensor resistance, which can then be read by an ADC on a microcontroller like an Arduino or ESP32 for concentration estimation.

Does the MP-3B sensor require calibration?

Yes, for accurate quantitative measurement, the MP-3B requires calibration against known alcohol concentrations. Its baseline resistance and sensitivity can vary between units and over time. For reliable ppm readings, establish a calibration curve in your target environment. For simple presence/absence detection, a threshold value may suffice.

What is the response time of the MP-3B alcohol sensor?

The MP-3B features a fast response time due to its planar semiconductor design, typically reacting within seconds to changes in alcohol concentration. Recovery time to baseline after gas removal is also relatively quick, making it suitable for applications requiring frequent or near-real-time sampling.