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Amazon.com: 3X Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch,to DC 5V Light : Industrial & Scientific
Amazon.com: HiLetgo 2pcs DC 24V 1 Channel Relay Module with OPTO Isolation Support High or Low Level Trigger : Industrial & Scientific
Amazon.com: 2X Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch,DC 3V to 12v Lamp（White） : Industrial & Scientific
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ELECTRONICS-SALON Panel Mount Momentary-Switch/Pulse-Signal Control Latching DPDT Relay Module,12V: Amazon.com: Industrial & Scientific
Amazon.com: Stable Timer Switch NO/NC Delay Relay Module High Accuracy for Electrical : Tools & Home Improvement
HiLetgo 3pcs 5V D1 Mini Relay Shield 5V Relay Module 1 Channel 5V Relay Shield: Amazon.com: Industrial & Scientific
Electronics-Salon DIN Rail Mount 8 SPDT Power Relay Interface Module. (Operating Voltage: DC 12V): Amazon.com: Industrial & Scientific
Amazon.com: Philmore N.O./N.C. Magnetic Reed Switch, SPDT : 30-10072 (1) : Industrial & Scientific
Amazon.com: ALMOCN 6Pcs DC 12V 1 Channel Relay Module With Optocoupler Isolation Support High or Low Level Trigger : Industrial & Scientific
Amazon.com: 10pcs 5V Mini Relay Shield 5V Relay Module 1 Channel 5V Relay Shield for WeMos D1 Mini also Compatible with Arduino : Electronics
Amazon.com: 2X Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch, DC 5Vto12V Light (Black) : Industrial & Scientific
Amazon.com: HiLetgo 12V 1 Channel Relay Module With Optocoupler Isolation Support High or Low Level Trigger : Industrial & Scientific
Eaton ESR5-NE-51-24VAC-DC Safety Relay, Single Channel Expansion Unit, 5 NO Safety Output, 1/1 NC Signal Output, 24 VAC/DC Control Voltage: Electronic Relays: Amazon.com: Industrial & Scientific
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Amazon.com: 3X Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch,to DC 5V Light : Industrial & Scientific
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Amazon.com: 2X Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch, DC 5Vto12V Light (Black) : Industrial & Scientific
Amazon.com: Relay, 24V, SPDT, NO/NC : Tools & Home Improvement
SCHNEIDER ELECTRIC 8501XO40V06 10 Amp 600 VAC Nema Control Relayplus Options - Electronic Relays - Amazon.com
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Amazon.com: SainSmart 4-Channel Relay Module : Automotive
Square D Single Function Timing Relay, 24VAC/DC, 10A @ 120/240V, 8 Pins, DPDT: Amazon.com: Industrial & Scientific
Amazon.com: Relay Module with Optocoupler 1 Channel High&Low Level Trigger Relay Module Board(24V) : Industrial & Scientific
