Free shipping by Registered Air Mail Original new in stock SIP-3 MQ303B MQ303 Semiconductor Alcohol Gas Sensor

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Model Number:SIP-3 MQ303B MQ303
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Location: Guangzhou Guangdong China
Address: Long Jin Road No. 4, Room 540, Long Jin Street , Liwan District , Guangzhou City, Guangdong, Province,
Supplier`s last login times: within 29 hours
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Product Details

MQ303B is a tin dioxide semiconductor type alcoholgas sensor, With high sensitivity and rapid response to alcohol, suitable for portable alcohol detectors and automotive fire systems and so on.


Sensor characteristics


High sensitivity

Fast response recovery

Long life, low power consumption

Small size


main application


Thegas sensorCan be widely used in portable alcohol detectors and car ignition system


Technical indicators


Product numberMQ303B
product typeSemiconductor gas sensor
Standard packageMetal package
Detection of gasalcohol
Detection of concentration20-1000ppm alcohol
Standard circuit conditionsHeating voltageV H0.9V ± 0.1V AC or DC
Circuit voltageVC≤ 6V DC
Load ResistanceR LAdjustable
Heating resistanceRH4.5W ± 0.5 W (room temperature)
Heating currentIH120 ± 20mA
heating powerPH≤ 140 mW
Characteristics of Gas Sensors under Standard Test ConditionsComponent power consumptionPS≤ 10 mW
Sensitive body surface resistanceRS4KΩ-400KΩ (in air)
SensitivitySRs (in air) / Rs (125 ppm alcohol) ≥3
Concentration slopeΑ0.50 ± 0.15 (R300ppm/ R100ppmalcohol)
Standard test conditionstemperature humidity20 ° ± 2 °;
65% ± 5% RH
Standard test circuitVc: 3.0 V ± 0.1 V DC;
VH: 0.9 V ± 0.1 V DC
Warm up timeNot less than 48 hours

Note: Product parameters are subject to change without notice

China Free shipping by Registered Air Mail Original new in stock SIP-3 MQ303B MQ303 Semiconductor Alcohol Gas Sensor supplier

Free shipping by Registered Air Mail Original new in stock SIP-3 MQ303B MQ303 Semiconductor Alcohol Gas Sensor

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