ITEM NAME:2PCS 3144E Hall Effect Sensor Switch Speed Counting Sensor Magnetic Detector JR a.imagelink a:hover.imagelink {color:#174d96;.2 using 3144E switch type Holzer sensor. 3 when the sensor sensor to the magnetic field, the digital output low, the signal light is bright; if no induction to the magnetic field, then the digital output high level, the signal light is not bright.
