Alcohol and Ethanol Gas Sensor (MQ-3)

20 ر.ق

  • Package Includes: 1 X MQ-3
  • Output voltage boosts along with the concentration of the measured gases increases
  • Adjustable sensitivity
  • Signal output indicator
  • Sensitive to alcohol, ethanol

Availability: 4 in stock

Detailed Test Parameters:
Model: MQ-3
Detecting gas: alcohol vapour
Detection concentration: 0.04-4mg/L alcohol
Standard circuit condition: Loop voltage VC 24DC
Heating voltage: VH 5.0±0.2V AC/DC
Load resistance: RL adjustable
Gas sensor characteristics under standard test condition: Heating resistor 31Ω±3Ω
Heating power consumption: 90mW
Sensitive surface resistance: 2KΩ-20KΩ (in 0.4mg/L alcohol)
Sensitivity: Rs (in air) / Rs (0.4mg / L alcohol) 5
Concentration slope: 0.6 (R300ppm/R100ppm alcohol)
Standard test conditions: 20±2; 65%±5% RH
Standard test circuit: 5.0V ± 0.1V
Warm-up time: 48 hours
Electrical Properties:
Input voltage: DC5V
Power consumption (current ): 150mA
DO output: TTL digital 0 and 1 ( 0.1 and 3.3V)
AO output: 0.1-0 .3V,  the highest concentration voltage is about 4V
Wiring:
1. VCC: connected to the positive pole of the power supply
2. GND: connected to the negative power supply
3. DO: TTL switching signal output
4. AO: analogue signal output

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