Winsen MP801 Air-Quality Gas Sensor - Semiconductor VOC Detection

Name: Winsen MP801 Air-Quality Gas Sensor - Semiconductor VOC Detection
Brand: Winsen
SKU: SENS-0295
Price: 219.00 INR
Availability: OutOfStock

₹219.00 (Inclusive of all taxes)

Out of Stock

The Winsen MP801 is a semiconductor-based air-quality gas sensor designed for detecting volatile organic compounds (VOCs) like benzene, toluene, methanol, and alcohol. It operates on a simple detection circuit with low power consumption, making it suitable for integration into air purifiers, exhaust systems, and indoor air quality monitors compatible with 3.3V or 5V logic systems.

Features

Semiconductor sensor for VOC detection (alcohol, benzene, toluene, methanol, smoke)
Low heater consumption ≤300mW for energy-efficient operation
Metal cap encapsulation ensures stable performance and long operational life
Simple interface with adjustable load resistance for easy signal conditioning
Compact form factor ideal for space-constrained applications

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Description

The Winsen MP801 gas sensor utilizes a multilayer thick-film manufacturing process. A metal oxide semiconductor layer is deposited on a miniature Al2O3 ceramic substrate, with a built-in heater and electrodes leading to external pins, all housed within a protective metal socket and cap. The sensor’s conductivity changes in proportion to the concentration of target gases; higher gas concentrations result in higher conductivity. This change can be measured with a basic external circuit to produce a corresponding output signal.

Engineered for stability and longevity, the MP801 is calibrated under controlled conditions (20°C ±2°C, 65% ±5% RH). Its robust metal encapsulation protects the sensing element from environmental contaminants, ensuring reliable performance in applications monitoring indoor air quality and controlling ventilation systems.

Key Features

Multilayer thick-film semiconductor sensing technology for VOC detection
Low-power heater design with consumption under 300mW
Metal cap and socket encapsulation for mechanical durability and stable baseline
Wide detecting range from 0.5 ppm to 1000 ppm (alcohol)
Simple variable-resistance output, easily interfaced with microcontroller ADCs
Optimized performance-to-cost ratio for mass-market air quality applications
Compact dimensions facilitate integration into consumer electronics and IoT devices

Applications

Indoor air quality monitors for homes and offices
Automatic exhaust fan and ventilation control systems
Air purifier and cleaner feedback control
Portable VOC and alcohol detection devices
Smart home environmental sensing nodes

Technical Specifications

Model Number	MP801
Sensor Type	Semiconductor (Metal Oxide)
Detection Gases	Benzene, Toluene, Methanol, Alcohol, Smoke (VOCs)
Detection Range	0.5 ~ 1000 ppm (Alcohol)
Load Resistance	Adjustable (External)
Heater Consumption	≤ 300 mW
Standard Encapsulation	Metal Cap & Socket
Recommended Operating Conditions	20°C ±2°C, 65% ±5% RH

Frequently Asked Questions

What gases does the Winsen MP801 sensor detect?

The MP801 is a broad-spectrum semiconductor sensor primarily sensitive to volatile organic compounds (VOCs). Its datasheet specifies detection of alcohol, benzene, toluene, methanol, and smoke. It provides a cumulative VOC reading rather than distinguishing between individual gases.

How do I interface the MP801 sensor with an Arduino or microcontroller?

The MP801 outputs a variable resistance proportional to gas concentration. Interface it by connecting it in series with a load resistor (adjustable, typically 1-10 kΩ) to form a voltage divider. Connect the divider's output to an analog input pin on your microcontroller (Arduino, ESP32, etc.) to read the voltage, which corresponds to the VOC concentration.

What is the power requirement for the heater circuit?

The integrated heater consumes very low power, with a maximum consumption (PH) of 300 milliwatts (mW). It typically operates at 5V DC. A stable voltage supply is crucial for consistent sensor heating and accurate, stable readings.

Does the sensor require calibration?

Yes, for quantitative measurements, baseline calibration is recommended. The sensor's resistance in clean air (zero-gas baseline) should be established. Concentration readings are then derived from the ratio of sensor resistance in target gas to its resistance in clean air (Rs/R0). Performance is optimized at 20°C and 65% RH.