1pcs lot mq138 Alcohol Gas Sensor Formaldehyde Detector Formaldehyde Sensor

Size: 32mm X22mm X30mm Length*Width*High The main chip: LM393, formaldehyde sensor Operating voltage: DC 5V Features: 1, with signal output indicator; 2, dual signal output (analog output and TTL level output); 3, TTL output valid signal is low; (output low signal light, you can access microcontroller IO port) 4, the analog output increases with the increase of the concentration, the higher the concentration, the higher the voltage; 5. High sensitivity to aldehydes, alcohols, ketones and aromatic compounds; 6, has a long service life and reliable stability; 7, rapid response recovery characteristics; 8, with mounting holes for easy installation; 9, the probe can be inserted and designed to facilitate the test. application: Volatile material detection device for households and the environment, suitable for the detection of aldehydes, alcohols, ketones, and aromatic compounds. Test concentration range of gas sensors: Benzene 1 to 100ppm Toluene 10 to 100ppm Methanol 5 to 100ppm Alcohol 30 to 300ppm Acetone 10 to 300ppm Formaldehyde 1 to 10ppm

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