How do i sell my invention for money? I am in need of money urgently?

I have developed a new electronic device, its a tank water controlling system with a display for water levels (its well tested and maintenance free). I can sell it to any one (know-how) like a company or a person with capital and planning to launch a product, but i dont know any one to whom I can sell.
I am not looking for patents.
I just need money urgently for funding my brothers higher studies.
Any suggestions or assistance would be greatly appreciated.

What is the best alternative for paypal in India?

The PayPal payment system was been imposed some restrictions by Reserve Bank Of India.Is there any other alternative payment source which enables us to receive the amounts more than $500.If yes then is there any possibility to withdraw the funds directly from the bank account.Please help me.