MQ3 Gas Sensor Interfacing with 89C52 | Simulation | Alcohol, Benzine, CH4, Hexane, LPG

Опубликовано: 19 Март 2026
на канале: Electronics Developer
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MQ3 Gas Sensor Interfacing with 89C52 | Simulation | Alcohol, Benzine, CH4, Hexane, LPG Gases Detection
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Features of MQ-3 Sensor
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1] Sensor Type - Semiconductor
2] Easy SIP header interface
3] Compatible with most of the microcontrollers
4] Low-power standby mode
5] Requires heater voltage
6] Good sensitivity to alcohol gas
7] Fast response and High sensitivity
8] Long life and low cost
9] Requires simple Drive circuit

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Specifications
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1] Power requirements: 5 VDC @ ~165 mA (heater on) / ~60 mA (heater off)
2] Current Consumption: 150mA
3] DO output: TTL digital 0 and 1 ( 0.1 and 5V)
4] AO output: 0.1- 0.3 V (relative to pollution), the maximum concentration of a voltage of about 4V
5] Detecting Concentration: 0.05-10mg/L Alcohol
6] nterface: 1 TTL compatible input (HSW), 1 TTL compatible output (ALR)
7] Heater consumption: less than 750mW
8] Operating temperature: 14 to 122 °F (-10 to 50°C)
9] Load resistance: 200kΩ
10] Sensitivity S: Rs(in air)/Rs(0.4mg/L Alcohol)≥5

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Copyright Disclaimer under Section 107 of the copyright act 1976, allowance is made for fair use for purposes such as criticism, comment, news reporting, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favour of fair use.

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