Hi Guys,
Just a quick question. I'm wondering if it is possible to detect a magnet above 3 inches of water? Lets say the sensor is placed beneath a cup of water and I drop a ball painted with magnetic paint into the cup. Would the sensor detect the presence of the magnet/ball?
Thanks a lot!
Yes. For example HMC5883L will detect that..
lo0ney:
Hi Guys,Just a quick question. I'm wondering if it is possible to detect a magnet above 3 inches of water? Lets say the sensor is placed beneath a cup of water and I drop a ball painted with magnetic paint into the cup. Would the sensor detect the presence of the magnet/ball?
Thanks a lot!
Most likely not as the magnetic paint would most likely not be 'strong enough' to be detectable at such distances. However one can buy real magnetic balls of a magnetic strength that would be detectable over such distances.
My original thought was that the paint may not provide a strong enough response from the sensor. I'm really stumped on how to detect the ball in the cup without modifying the cup at all. Weight sensors, I would assume, would not be able to differentiate between a 2g ball and fluctuations in water movement, etc
The water won't make any difference. If you can detect the magnet a given distance in air, you can detect it through that much water. The cup won't matter either, unless it is made of a magnetic metal.