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OPB917BZ Optek | OPB917BZ Optek, Through Hole Slotted Optical Switch, Buffer, Open-Collector with 10K Pull-Up Resistor Output | 455-0919 | RS Components
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Amazon.com: SMC ZSE4-T1-25 0-145.04 PSI, Vacuum Switch, 12-24 VDC, 1/4 INCH NPT, 1/8 NPTF Port, NPN Open Collector Output: Industrial & Scientific
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