MQ-138 GAS SENSOR MODULE FORMALDEHYDE DETECTOR

Product features
Size: 22mm X30mm X 32mm length * width * height
Two, the main chip: LM393, formaldehyde sensor probe
Three, working voltage: DC 5V
Four, characteristics:
1, with the signal output indicator;
2, dual signal output (****og output and TTL level output);
3, TTL output valid signal is low; (the output low power signal light is bright, can be connected with the microcontroller IO port)
4, the output of ****og quantity increases with the increase of concentration, the higher the concentration, the higher the voltage is;
5, the aldehyde, alcohol, ketone, aromatic compounds with high sensitivity;
6, has a long life and reliable stability;
7, fast response recovery characteristics;
8, with the installation hole to facilitate the installation of fixed;
9, the probe can be inserted into the design, convenient test.
Five, application:
The volatile matter detection device for the family and the environment is suitable for the detection of aldehyde, alcohol, ketone and aromatic compounds, and the concentration range of the gas sensing element test:
Benzene 1 to 100ppm
Toluene 10 to 100ppm
Methanol 5 to 100ppm
Alcohol 30 to 300ppm
Acetone 10 to 300ppm
1 to 10ppm formaldehyde