This alcohol sensor is suitable for detecting alcohol concentration in your breath, just like your common breathalyzer. Sensor provides an analog resistive output based on alcohol concentration.When the sensor is present in the environment in which the alcohol vapor, the sensor’s conductivity increases with the concentration of alcohol gas in the air increases.Using a simple circuit can be converted to the change in conductivity of the gas concentration with the corresponding output signal.

Features:

• High quality double panel design, with power indicator and TTL output signal
• Have DO switch signal(TTL) output and AO analog signal output
• TTL output signal for low level effectively. (when the low output electric signal lights at ordinary times, can be directly connect single chip microcomputer or relay module)
• Analog output voltage with concentration, the higher concentration, the higher voltage
• Has better sensitivity with the liquefied petroleum gas, natural gas, city gas, smoke
• Has long service life and reliable stability
• Rapid response recovery features

Pin Description:

• VCC:Positive (5 v)
• GND:Connect power negative
• DO:TTL switch signal output
• AO:Analog signal output

Electrical properties:

• Input voltage : DC5V Power consumption ( current ): 150mA
• DO output : TTL digital 0 and 1 ( 0.1 and 5V)
• AO output :0.1-0 .3 V ( relative to pollution ) , the maximum concentration of a voltage of about 4V
• Special note: After the sensor is powered , needs to warm up around 20S, measured data was stable , heat sensor is a normal phenomenon , because the internal heating wire , if hot is not normal .