is arduino used in proffissionals products ?
The Atmel MCUs that are used in Arduinos are widely used in professional products.
Without knowing what you have in mind it is difficult to say whether a product such as an Arduino Uno should be used in a professional product. For example it may be very appropriate for an educational product.
...R
thanks 
Atmel MCUs is a good exampl of professional product
Sorry but I have to say, this is one weird post...
It just about made me cry. Fortunately for me, Kleenex is also a professional product.
dmjlambert:
It just about made me cry. Fortunately for me, Kleenex is also a professional product.
Karma +1