Hi,
I am looking for a low-cost liquid level sensor for sensing the level of extremely mild caustic soda. It is so mild and diluted that you can even wash you can keep your hands in it for long time without any issues.
It is for a production product, so I did quite a bit of research but they are either not for a sealed container or very expensive.
I have also come across some thermistor level sensor which I am not sure how reliable or accurate they are... I can understand on-off (using a second one as reference) but level..?
I simple to make I can also consider designing the float and use stock components for the rest (but the sealing still remains an issue unless it can be detected through the metal enclosure.
In summary
- the liquid to be measured is inside a sealed (air tight) tank.
- the tank containing the liquid is stainless steel
- the displacement is 130mm to 150mm
- precision does not nee to be high at all, even 5mm "granularity/accuracy" (+/-2.5mm) in reading is acceptable
Does anybody have any suggestion on either some stock parts or ways to make a custom one?
Many thanks