Description
[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:
- with the signal output LED indication;
- 2-way signal output (analog output, and TTL-level output);
- TTL output valid signal is low; (low output signal light, which can be accessed microcontroller IO port)
- analog output increases with the concentration, the higher the voltage the higher the concentration;
- aldehydes, alcohols, ketones, aromatic compounds with high sensitivity;
- with a long life and reliable stability;
- Fast response characteristics;
- with mounting holes for easy permanent installation;
- the probe can plug design for easy testing.
Package Include:
- 1x MQ138 Formaldehyde Aldehydes gas detection sensor
