









Flat Semiconductor Alcohol Sensor MP-3B
Summary:
MP-3B model with advanced planar construction is comprised of heater and metal oxide semiconductor material of subminiature Al2O3 ceramic plate, fetch out electrode down-lead, encapsulation in metal base and cap. When the target gas (alcohol) exists , The sensor's conductivity is more higher along with the gas concentration rising. Please use simple electrocircuit, Convert change of conductivity to correspond output signal of gas concentration.
Feature:
* Lower consumption
* Small size
* Fast response and resume
* Highest sensitivity
* Excellent stability and long life
* Easy circuit and big signal output
* Excellent selectivity
APPLICATION
The picture shows a common "ignition interlock system" with an alcohol detection function in the United States. This lock is connected to the ignition system of the car. Before ignition, the driver must blow air to ensure that the alcohol concentration in the body does not exceed the standard. and the car can start.
Strengthen the punishment of drinking and driving in all the country to reduce the vicious traffic accidents caused by drunk driving. This involves testing a person's alcohol level and using equipment to do the testing. An alcohol detector is an effective tool for measuring the alcohol content in the human body.
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PARAMETER
Technical Data Sheet
Model | MP-3B | ||
Sensor Type | Flat Surfaced Semiconductor | ||
Standard Encapsulation | Metal Cap | ||
Target Gas | Alcohol gas | ||
Detection range | 0~500ppm alcohol | ||
Standard Circuit Conditions | Loop Voltage | VC | ≤24V DC |
Heater Voltage | VH | 2.5V±0.1V AC or DC | |
Load Resistance | RL | Adjustable | |
Sensor character under standard test conditions | Heater Resistance | RH | 23.5Ω±4.5Ω (room tem.) |
Heater consumption | PH | ≤350mW | |
Resistance of sensitive material | RS | 5KΩ~50KΩ (in 50ppm C2H5OH) | |
Sensitivity | S | Ro(in air)/Rs(50ppm C2H5OH)≥3 | |
Concentration Slope | α | ≤0.6(R3000ppm/R50ppm C2H5OH) | |
Standard test conditions | Tem. Humidity | 22℃±2℃;55%±5%RH | |
Standard test circuit | VC: 2.5V±0.1V VH: 2.5V±0.1V |
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Preheat time | Not less than 48 hours |

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