ITEM NAME:2Pcs NJK-5002C NPN NO 10mm Hall Effect Sensor Proximity Switch DC 6~36V T1T1 2Pcs NJK-5002C NPN NO 10mm Hall Effect Sensor Proximity Switch DC 6~36V T1T1 A2U5 It is a component widely used in automatic control industry for detecting, controlling, and noncontact switching When proximity switch is close to magnetic material, it will send out control signal. Product Name Hall Effect Sensor Proximity Switch Model NJK-5002C Theory Hall Effect Sensor Wire Type 3 Wire Type (Brown, Blue, Black) COLOR: Black&blue&sliver Output Type NPN NO(Normally Open) Detecting Distance 10mm Supply Voltage 6-36V DC Detect Object Magnetic material Diameter/Length 12mm/30mm Cable Length 1.2M/3.5Ft Material: Aluminum,ABS Package Contents: 2x switch Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.