MQ-3 Alcohol Gas Sensitive Detector with 4 Screw Holes Double-Sided Circuit Board Detector Power Indication TTL Signal Output Indication DIY Starter Kit
Feature:
1. Premium Dual Panel Design: Alcohol ethanol sensor module features a high-quality dual panel design, complete with power indicator and TTL signal output indicator for enhanced functionality and convenience.
2. Versatile Signal Outputs: With DO switch signal (TTL) output and AO analog signal output, alcohol gas sensitive detector offers versatile connectivity options to meet your specific needs.
3. Low-Level TTL Output Signal: For alcohol ethanol alarm, the TTL output generates an effective low-level signal, allowing direct compatibility with microcontrollers or relay modules. When the signal is low, the indicator light illuminates for easy monitoring.
4. Accurate Concentration Measurement: Breath gas detector provides analog output voltage that corresponds to alcohol concentration. As the concentration increases, the voltage output also rises, ensuring precise and reliable measurements.
5. Enhanced Sensitivity for Alcohol Detection: Experience exceptional sensitivity when it comes to alcohol detection. Ethanol detection module delivers reliable and accurate results even in environments with low alcohol concentrations, providing peace of mind during monitoring.



Specification:
Origin: Mainland China
Material: Metal
Module application:
Alcohol (ethanol) detection is used for on-site testing of motor vehicle drivers and other strictly prohibited personnel working under the influence of alcohol, as well as for detecting ethanol vapor in other places
Input voltage: DC5V Power consumption (current): 150mA
DO output: TTL digital quantities 0 and 1 (0.1 and 5V)
AO output: 0.1-0.3V (relatively pollution-free),ZUI high concentration voltage around 4V
Wiring method:
1. VCC: Connected to the positive pole of the power supply (5V)
2. GND: Connected to the negative pole of the power supply
3. DO: TTL switch signal output
4. AO: Analog signal output
Size: 32.00x20.00x16.00mm
Size: 1.26x0.79x0.63inch

Note:
After the sensor is powered on, it needs to be preheated for about 20s to stabilize the measured data. Heating the sensor is a normal phenomenon because there is an electric heating wire inside, which is abnormal if the hand is hot.
Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!
Please allow 1-2cm measuring deviation due to manual measurement.

1 x Alcohol Ethanol Sensor Module

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