The module features:

1, the use of high-quality dual panel design, with a power supply indicating and TTL signaloutput indicator;

2, with the DO switch signal (TTL) output and AO analog signal output;

3, the TTL output valid signal is low. (when output is low electrical level signal lights, can be directly connected with the single chip microcomputer or relay module)

4, the analog output voltage with the higher concentration the higher the voltage.

5, liquefied petroleum gas, natural gas, city gas, smoke has good sensitivity.

6, there are four screw holes for positioning;

7, product dimensions: 32 (L) *20 (W) *22 (H)

8, has long service life and reliable stability

9, rapid response recovery characteristics

Electrical properties:

Input voltage: DC5V power (current): 150mA

DO TTL digital quantity output: 0 and 1 (0.1 and 5V)

The AO output: 0.1-0.3V (relative to no pollution), the highest concentration of voltage of about 4V

Special remind: sensor energized need preheating, about 20S, the measured data is stable,the sensor heating is a normal phenomenon, because the internal electric heating wire, if hotis not normal.