detection
Singing high-quality dual panel design, with power indicator and instructions for TTL signal output;
The switching signal has a DO (TTL) output and an analogue output AO;
Valid TTL output signal is low. (Low-level signal when the output light can be connected directly to the microcontroller or relay module)
Analogue 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 service life and reliable stability
Fast response and recovery properties
Input voltage: DC5 V. Power consumption (current): 150 mA.
DO output: TTL digital 0 and 1 (0.1 and 5 V).
AO output: 0.1-0.3V (relative to pollution), the maximum concentration of a voltage of about 4V
Special note:
After the sensor has been powered, it must warm up by 20 S, the measured data was stable, the heat sensor is a normal phenomenon, because the internal heating wire when it is hot is not normal.
VCC: positive power supply (5V).
GND: power supply is negative
DO: TTL switch signal output.
AO: analogue signal output.