sr501 for sale, brand-new and used.

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BRAND NEW TACO SR501-4 SINGLE ZONE SWITCHING RELAY NO RESERVE This listing is for a bran

New in box Taco SR-501 1 Zone switching relay. Box opened for first time for photo, still sealed in the plastic. Good luck and happy bidding!

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Ready assembled motion detector circuit. You can see the sensor on the photos, and the IC on the PCB.The pin connection is imprinted.The Fresnel lens can be detached. 5 volts supply (there is a linear regulator IC on the PCB).

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TTL output goes high when it detects people, output is low when it is not detecting. When a person enters the protected area the sensor output is high. When a person leaves the protected area, after the adjustable delay, the sensor output goes low.