MQ-2 Smoke Gas LPG Butane hydrogen Sensor Module

MQ-2 Smoke Gas LPG Butane hydrogen Sensor Module is designed for electronics, IoT, robotics, and Arduino based applications. This module is easy to integrate with microcontrollers such as Arduino UNO, ESP32, NodeMCU, and Raspberry Pi. Suitable for educational, automation, industrial, and DIY electronic projects. Module Application: Can be used for household and factory gas leakage monitoring device, suitable for liquefied gas, butane, propane, methane, smoke and other detection; Module Features: 1. Adopt high-quality double-panel design, with power indication and TTL signal output indication; 2. With DO switch signal (TTL) output and AO analog signal output; 3. TTL output valid signal is low level. (When the output is low, the signal light is on, and it can be directly connected to the microcontroller or relay module) 4. The analog output voltage is higher with the higher concentration. 5, the liquefied gas, natural gas, city gas, smoke has good sensitivity. 6. There are four screw holes for easy positioning; 7. Product dimensions: 32(L)* 20(W)* 22(H) 8. It has long service life and reliable stability 9. Fast response recovery feature Electrical performance: Input voltage: DC5V power consumption (current):150mA DO output: TTL digital 0 and 1(0.1 and 5V) AO output: 0.1-0.3V (relatively no pollution), the highest concentration voltage of about 4V Special reminder: After the sensor is powered on, it needs to be preheated for about 20S, and the measured data is stable. The heating of the sensor is a normal phenomenon, because there is an electric heating wire inside, if it is hot, it is not normal. Wiring mode: 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