[Discontinued] MQ-138 Formaldehyde Aldehydes Gas Detection Sensor

Description:

For the family, the environment of the volatile compounds detection devices, suitable aldehydes, alcohols, ketones, aromatic compounds detected, the gas sensor test concentration range:

• 1 to 100ppm benzene
• Toluene 10 to 100ppm
• Methanol 5 to 100ppm
• Alcohol 30 to 300ppm
• Acetone 10 to 300ppm
• Formaldehyde 1 to 10ppm

Provide a reference routines, circuit diagrams and Other relative information.

Specification:

• Size: 32mm x 22mm x 30mm
• Main chip: LM393, formaldehyde-sensing probe
• Working voltage: DC 5V

Characteristics:

1. with the signal output LED indication;
2. 2-way signal output (analog output, and TTL-level output);
3. TTL output valid signal is low; (low output signal light, which can be accessed microcontroller IO port)
4. analog output increases with the concentration, the higher the voltage the higher the concentration;
5. aldehydes, alcohols, ketones, aromatic compounds with high sensitivity;
6. with a long life and reliable stability;
7. Fast response characteristics;
8. with mounting holes for easy permanent installation;
9. the probe can plug design for easy testing.

Package Include:

• 1x MQ138 Formaldehyde Aldehydes gas detection sensor