Water-level sensor is used to indicate the level of water in over head tank,by using this we can avoid the overflow of water ,and at any time we can know the level of water in tank, it has a simple circuit .
Product official page:
http://robotdyn.com/Sens-WaterLev-EN – International
http://robotdyn.ru/Sens-WaterLev-RU – Russian
* For get a detail information of product, instruction, guide and software, Pls visit to official page of product.