SA float switch is a device used to sense the level of liquid within a tank. The switch may actuate a pump, an indicator, an alarm, or other device. It can be easily converted from normally open to normally close by inverting the float. Note: because the current that the switch can carry is much little(0.5A), you must use a relay or contactor when it is connected by a load, relay or contactor are not included here. Cable color may be different, we will random shipment. Product Name: Water Level Sensor Model No.: ZP4510 Max Contact Rating: 10W Max Switching Voltage: 100V DC/AC Max Switching Current: 0.5A Max Breakdown Voltage: 220V DC/AC Max Carry Current: 1A Max Contact Resistance: 100m ohm Temperature Rating: -20 / +80 Celsuis Float Ball Material: PP Float Body Material: PP Thread Dia(): 9.5mm / 0.374" Switch Body Size: 23.3 x 57.7mm / 0.9" x 2.27"(Max D*H) Cable Length: 36cm / 14.2" Color: White Net Weight: 70g Package Contents: 5 x Water Level Sensor Only the above package content, other products are not included. Note: Light 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.