size: 42mm X 22mm wide X high 27mm
main chip LM393, MQ-137 gas sensor
working voltage: 5 V DC
1, with the signal output instructions.
2, the dual signal output (analog output and TTL output level)
3, the TTL output valid signal is low. (when the output low levelalarm lights, can be directly connected with the single chip microcomputer)
4, analog output 0~5V voltage.
5, the ammonia has good sensitivity.
6, has long service life and reliable stability
7, rapid response recovery characteristics
For the family, the environment of harmful gas detection apparatus,detection suitable for ammonia gas and harmful gas
Applications: MCU learning, electronic competition, product development, graduation design…