MQ-4 High Sensitivity Methane Detector Sensor Module Blue 3-5VDC

Product Feature: Using high-quality dual-panel design, with power indicator and TTL signal output instructions; The switching signal having a DO (TTL) output and analog output AO; TTL output valid signal is low. ( Low-level signal when the output light can be directly connected to the microcontroller or relay module ) Analog output voltage with the higher concentration of higher voltage. A gas, natural gas, city gas, smoke better sensitivity. There are four screw holes for easy positioning; Has a long life and reliable stability Rapid response and recovery characteristics
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.
Wiring:
VCC: positive power supply (5V)
GND: power supply is negative
DO: TTL switching signal output
AO: analog signal output
Package Content: 1 x Methane Gas Sensor