Target: alcohol, smoke, formaldehyde, toluene, benzene,lighter gas,paint &etc.
Model: MP905
Detection range: 0.5-1000ppm(C2H5OH)
Detection principle: Semiconductor
Characteristics: High sensitivity to benzene,toluene,formaldehyde,alcohol,smoke,lighter gas,paints
Size: φ9.4×7.5
Working conditions: Loop Voltage:5±0.1V
Heater Voltage:5±0.1V
Heater consumption:≤300mW

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MP905 gas sensor is for air quality. It adopts multilayer thick film manufacturing technology. The heater and metal oxide semiconductor material on the ceramic substrate of subminiature Al2O3 are fetched out by electrode down-lead, encapsulated in metal socket and cap. Conductivity of the sensor is affected by the concentration of target gas. The higher the concentration is, the higher conductivity of sensor gets. Users can adopt simple circuit to convert variation of conductivity into output signal corresponding to gas concentration.


It is used in occasions such as household and office for harmful gas detection, automatic exhaust device, air cleaner&etc.


High sensitivity to benzene,toluene,formaldehyde,alcohol,smoke,lighter gas,paints;quick response and resume; low power consumption, simple detection circuit, good stability and long life.


Model MP905
Sensor Type Semiconductor flat surfaced sensor
Standard Encapsulation Metal Cap
Detection Gas benzene,toluene,formaldehyde,alcohol,smoke,lighter gas,paintsetc.
Detection range 0.5~1000ppm(alcohol)
Standard circuit Loop voltage VC / VH  5.0V±0.1V DC
Load resistance RL Adjustable
sensor features in standard test condition Heating resistance RH 95Ω±10Ω(Room Tem.)
Heating consumption PH ≤300mW
Surface resistance RS 1KΩ~15KΩ(in 10ppm alcohol)
Sensitivity S Rs(in air)/Rs(in 10ppm alcohol)≥2
Concentration slope α ≤0.6(R50ppm/R10ppm alcohol)
Standard condition of test Temperature, humidity 20℃±2℃;65%±5%RH
Standard test circuit VC/VH :5.0V±0.1V
Warm-up time More than 48 hours

* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.

Technical Support:

Customized technical design and function, LOGO and package are available without extra charge (including molding fee) for mass volume.

The sensors don't have sleeping mode. It can be set in program if needed.

All Winsen products go through strict inspections and tests to make sure they are 100% qualified before shipping out.

The sensor has been fully tested (not calibrated) before leaving the factory. However, after transportation and storage, the environment conditions change, and the surface of the sensor absorbs moisture, mixed gas, pollution matters, etc. It is recommended that customers perform aging and calibration after sensors become stable according to the program and use occasions of the whole device.

15﹪-90﹪RH without condensation,greater or less than this range or long-term high temperature and high humidity will affect the life of the sensor.

Our sensors are certified with CE, 3C, ROHS, anti-explosion, fire prevention, and coal mining safety according to different applications. And we provide assistance for new certification.

Many factors can cause the sensor to fail such as broken wires in transportation, poisoning, falling off of the sensitive material, damage to the heating wire (device), etc. Please find specific cause in each category with Winsen’s aftersales.

Winsen provides professional consultation and service before and after sales. We will recommend the best fitting sensor for your demand. If you have any problem, don’t hesitate to email us to

Due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. But we will reply to your inquiry in 24 business hours.