using high-quality design PANEL double, with power meter and TTL output instructions; with only a signal switch (TTL) output and analog output AO; TTL output high and low. (can be directly connected microcontroller or relay module) analog voltage output change with concentration. liquefied petroleum gas, natural gas, city gas, smoke have better sensitivity. there is a screw hole for easy positioning; with a long life and reliable stability quick response and resume
Specification
Input voltage: DC5V power (current): 150mADO Output: TTL digital 0 and 1 (0.1 and 5 V)Output AO: analog signal level
Instruction
VCC: positive power supply (5 V) GND: a negative do TTL output signal switch AO: analog output a fixed bolt hole for easy installation