MQ-9 Combustible Gas Sensor Module

Description:

1. Utilizes high-quality dual-panel design with power indicator and TTL signal output indicator.

2. Features a digital output (TTL) switch signal and an analog output signal.

3. The TTL output effective signal is low level. (When the output is low level, the signal light turns on, and it can be directly connected to a microcontroller or relay module.)

4. The analog output voltage increases with higher gas concentration.

5. Exhibits good sensitivity to carbon monoxide detection.

6. Offers long service life and reliable stability.

7. Provides fast response and recovery characteristics.

Specifications:

• Input Voltage: DC 5V

• Power Consumption (Current): 150mA

• Digital Output (DO): TTL digital signal 0 and 1 (0.1V and 5V)

• Analog Output (AO): 0.1–0.3V (relative to no pollution), high concentration voltage around 4V