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depending on whether you wish to detect the water's rise or fall
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and Sports: This Atmospheric Sensor is perfect for outdoor activities like hiking
125KHz RFID Keychain (read) Motor Driver IC Raspberry Pi 3B+ on sale125kHz RFID Keychain (read) This is 125kHz RFID Tag. The RFID technology is used for sensing and identifying tagged people and objects for access control, automation, and a whole range of different applications. Operating on a frequency of 125kHz, these tokens are all pre programmed with unique ID numbers to communicate wirelessly with RFID Readers over distances of around 10cm or less. This means you can attach it to vehicles or items, keyrings or
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US$ 39.00