Description MQ-4
It is suitable for monitoring equipment for liquefied gases,natural gas and gas in home or industry.
Excellent resistance to ethanol and smoke.
1. It adopts a high-quality double panel design with power indication and TTL signal output indication;
2. It has DO switch signal (TTL) output and AO analog signal output;
3. The TTL output valid signal is low. (When the output is low, the signal light is on, it can be directly connected to the MCU or relay module)
4. The voltage of the analog output, the higher the concentration, the higher the voltage.
5. It has good sensitivity to gas and natural gas detection.
6. There are four screw holes for easy positioning;
7. Product dimensions: 32 (L) * 20 (W) * 22 (H)
8. Has a long service life and reliable stability
9. Fast response recovery characteristics
Electrical Performance:
Detection of gas: Natural gas/Methane
Detection of Concentration: 300-10000ppm
Input voltage: DC5V
Power consumption (current): 150mA
DO output: TTL digital quantities 0 and 1 (0.1 and 5V)
AO output: 0.1-0.3V (relatively non-polluting), the highest concentration voltage is about 4V
Using the chip: AT89S52
Crystal: 11.0592MHZ
Baud rate: 9600
Compilation environment: Keil
Special Reminder:
After the sensor is energized, it needs to be preheated for about 20S, until the measured data is stable. The heating of the sensor is a normal phenomenon, because there is a heating wire inside, if it is hot, it is not normal.
Package Included:
1Pcs MQ-4 Gas Sensor Module