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Amazon.com: DAOKI 2 Pcs Measuring Transducer Sensor Ultrasonic Distance Sensor Module JSN-SR04T DC 5V Waterproof with 2.5M Cable for Arduino : Industrial & Scientific
Photoelectric Switch Sensor, E3Z-T61 DC 12-24V IR Photoelectric Infrared Sensor Switch NPN Output Proximity Switch for Automatic Equipment: Amazon.com: Industrial & Scientific
2 Pack - AC DC 12V 10A Auto On Off Photocell Light Switch Photoswitch Light Sensor Switch - - Amazon.com
24 Volt Day/Night Sensor for Low Voltage DC LED Lights up to 240 Watts - - Amazon.com
Amazon.com: Voltage Tester Sensor Measurement Detection Module DC 0-25V Terminal Sensor Module for Arduino UNO Mega Robot Smart Car Geekstory (Pack of 10) : Electronics
Amazon.com: Baomain Capacitive Proximity Sensor Switch LJC12A3-5-Z/AX NPN NC DC 10-30V 200mA 1-5mm Blue : Industrial & Scientific
WINGONEER 5Pcs Hall Effect KY-003 Magnetic Sensor Module DC 5V for PIC AVR Smart Cars: Amazon.com: Industrial & Scientific
Amazon.com: uxcell PL-05N DC 10-30V 200mA NPN NO 5mm Inductive Proximity Sensor Detection Switch : Industrial & Scientific
