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The switches is a three-wire,solid state device recommended for low current DC loads such as interfacing with a programmable controller.It provides compact,reliable sensing for virtually infinite life. An LED indicator light illuminates when switching occurs. Models are available in current sinkin(NPN) and current sourcing (PNP) models.Either can be used for loads such as counters and solid state relays. Selection of sinking or soucing models depends on the requirements of the programmable controller.
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Remarks: we can also made Hall speed sensor , Hall current sensor . which is used in CNC or Battery industry.
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