ลูกลอยไฟฟ้า ยาว 12CM (120mm) Float Switch Water Level Sensor Vertical Float Switch for Aquarium Water Level Liquid Sensor Normal Close เซ็นเซอร์วัดระดับน้ำ สวิทช์ลูกลอย ตั้งเป็น NO หรือ NC ได้

ลูกลอยจะตั้งมาเป็น NC : Normal Close 
หากต้องการตั้งให้เป็น NO : Normal Open ให้ถอดลูกตุ้มออกแล้วสลับด้านกัน

Description:

• A 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.

• This float switch is a simple structure,easy installation liquid level controller.It does not have a complex circuit,will not be disturbed,as long as the material selection,liquid,pressure or temperture can be used in any environment.
• Light weight and simple working principle,high reliability.
• The float level switch is widely used in electronic,electrical,chemical,water treatment,drainage and other walks of life level control and alarm.
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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 and contactor are not included here.