3pcs KY-024 4pin Linear Magnetic Switches Speed Counting Hall Sensor Module for Arduino
1. has the signal output instructions.
2. single signal output.
3. effective signal output for low level.
4. sensitivity adjustable pure tone .
5. have the field cuts have signal output
6. circuit boards output switch quantity! (can be directly by SCM)
3 x KY-024 Hall Sensor Module