Currently I have made my own hollow cylinder with a diameter of 8 cm and a height of 12 cm out of stainless steel plate, in which I will add water and heat it to a specified temperature range (40 to 100 degrees). Since the water container is very small, I would like to use a level sensor to implement an automatic control function that adds water to the container if the water level falls below a specified height.
But I have checked some information and optical sensors are not suitable due to the stainless steel material. And the float sensor is not suitable due to the pressure change of the closed container.
So I am confused, what kind of sensor should I choose, which is small enough to fit my tank and can work stably?
Any replies and suggestions from you would be greatly appreciated!
if you "push" water into the system, can the water "flow out" ?
Could you just have a constant water supply at the entry point ? like a big tank with a one way valve pushing through gravity water into your container to keep it full ? you would need then to only monitor the water in the external tank, probably easy with a float sensor
If I tap a glass with water in it, it will vibrate differently on how full it is. If it is full say halfway, it might resonate so perhaps the fullness desired can be on some resonance?
How is that music?
I'm not sure if it is appropriate for your application, but they make ultrasonic tank level sensors, both top mounted and side-on. In some cases, they are able to measure through the material of the tank wall.
Not sure what's out there exactly, but could be something else to investigate.
You can get one combined sensor, typically used for automotive applications and usually made by Bosch so there should be plenty of information available.
