HC-SR04 Ultrasonic Sensor 5 Pack

This economical sensor provides 2cm to 400cm of non-contact measurement functionality with a ranging accuracy that can reach up to 3mm. Each HC-SR04 module includes an ultrasonic transmitter, a receiver and a control circuit.  Connect it to a microcontroller flashed with ESPHome and integrate it to Home Assistant for measuring things such as your water softener salt level, if your car is parked in the garage or the garage door is up, or any other projects you want to measure the distance to an object.

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