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Gravity: Analog Dissolved Oxygen Sensor/Meter Kit: Amazon.com: Industrial & Scientific
Amazon.com: DC 5V-24V Mini PIR Motion Sensor Switch Occupancy Sensor Switch for DIY LED Lighting, PIR Infrared Motion Sensor Detector Automatic Switch LED Strip USB Interface (White) : Tools & Home Improvement
Leviton OSC20-M0W Ceiling Mount Occupancy Sensor, White - Home Security Systems - Amazon.com
Enbrighten Z-Wave Smart Motion Sensor Light Indoor, On/Off, Vacancy/Occupancy Sensor, Includes White & Almond, Zwave Hub Required, Works with SmartThings, Wink, & Alexa, Smart Light Switch, 26931 - - Amazon.com
ENERLITES - MPC-50V-STICKER Ceiling Occupancy Sensor by PIR Ceiling Sensor for Junction Box Installation, MPC-50V, White: Amazon.com: Tools & Home Improvement
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