HOW Magnetic/Reed Sensor work?(SMC D-A54 Pnuematic Sensor)

This is Magnetic Sensor also called pneumatic sensor . It works when magnetic target comes in sensing range of sensor. It is widely used in pneumatic cylinder .This is two wire sensor,also available in 3 wire and 4 wire.

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Advantages:
*Used in pneumatic cylinders.
*High precision.
*It consumes low power.
*It is relatively affordable sensor.
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Disadvantages:
*when the movement frequency of target is very high, it malfunctions.
(Solution is to use Hall effect Sensor)
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[Movieman]

Hello. Thanks for this demo. I tested my SMC D-A54 sensors with 24 vdc mounted on the cylinder. It worked at first. But now it will not light up anymore. I know that the Blue wire is Negative and the Brown wire is Positive. Can you explain why it doesn't work now?

[kashyapprashant]

Good morning sir,
Mujhe ek baat batayege, reed switch ki LED kaise glow Ho jati hai, kyoki reed switch me ham ek wire me input dete hai aur dusre wire se output lete hai, to fir LED ek hi wire me supply dene par kaise glow jo jati hai.

[kashyapprashant]

Kishi bhi LED ya bulb Ko jalne ke liye phase+newtral, ya positive+nigetive supply dete hai, tabhi vo jalta hai, to fir reed switch ki LED kaise glow Ho jati hai only positive supply dene par...