Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
arvinfx, can you tell us the device names of each of the three devices you have in the images above it may help us find more information.
Yes.are you sure it detects water and not any obstacle?
one common sensor is ultrasound transducer and can be used to measure fluid level in a tank for example using echo location. it sends pulse, than waits and measures delay until reflection comes back. modern ultrasound transducers are compact, able to distinguish even soft surfaces (like sponge/foam in a car seat) and also can be highly directional (for sound wave) with cone of about 30deg only.
Can't see that in the photos?this device is realy small! It looks like a 2W resistor in a varnish tube.
are you sure it detects water and not any obstacle?
Yes.
Does the tube contain (apart from the 'resistor') a liquid or air?It looks like a 2W resistor in a varnish tube.
Can't see that in the photos?