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The Grove Water Level Sensor is a very accurate sensor that can be helpful in water level sensing applications. It is completely waterproof and uses capacitive pads to detect water levels up to 10cm.
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Mom: Hey son, our tank is overflowing again!!! Son: Ohh…. not again…. (Now it’s time to use what I learnt at my electronics class). Don’t worry Mom, I will use a Grove – Water Level Sensor and fix the problem!
We have dedicated our time to help you get started with this sensor quickly and easily. Try the example code and experience the demo above with clear codes.
What better way to describe a product without having a story behind it?
Well…A few months ago, we thought of developing a water level sensor, but we wanted it to be different, unlike traditional water level sensing techniques such as using Ultrasonic Sensing and Resistance Based Sensing.
We have tested out different water level sensing methods such as using Non-contact capacitance-based sensing where we placed the sensor outside the container filled with liquid and also use a Carbon Stick to detect the water level.
But we figured that the results we got were not up to our expectations and after long period of use, the Carbon started to chemically react with water which made this technique not ideal.
So, we finally came up with a solution by using Capacitance Sensing technique. We used capacitive pads on the PCB of the module and did conformal coating over the PCB to make the sensor protect against moisture, dust, chemicals and high temperatures. We believe that this technique will allow you to make accurate water level measurements (±5mm accuracy) easily.
Let’s look at the difference between few water level sensing methods.
The blue oil layer on the surface of the module’s capacitance sensing area should be kept intact. When the oil layer is damaged and the test object is a conductive liquid, the test data may be abnormal.
When testing, the highest liquid level inserted should not exceed the white dividing line, otherwise it will cause a short circuit.
This is the wiki page for this product, which will show you how to use the product, as well as details about the software and hardware.