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No corrosion: Resistive sensors have bare metal probes that corrode within weeks in moist soil
These IR LEDs and photodiodes operate at 940nm wavelength
For standard Raspberry Pi OS usage
5V Logic Level: Directly compatible with a vast ecosystem of 5V sensors
HC-SR-04 Ultrasonic Distance Sensor Module M2F No corrosion: Resistive sensors have```html HC SR04 Ultrasonic Distance Sensor Module Measure distances accurately from 2 cm to 400 cm using ultrasonic sound waves with the HC SR04 the most popular and reliable non contact distance sensor for Arduino, Raspberry Pi, and embedded projects. Available now from The Engineer Store, Bengaluru with fast shipping, 7 day warranty on manufacturing defects, and expert technical support. Specifications Sensor Type Ultrasonic Ranging Module Model HC
US$ 35.50
US$ 24.00
US$ 37.70
