Dynamic fields layout based on categories I have entries called products. Those entries are organized in categories. I'm using fields to save technical data for each product ( ex. Flow rate, Pressure, Voltage, etc. ).
Not all fields suit all product categories ( ex. Voltage doesn't make sense for pneumatic pumps ). 
Is there a way to associate some fields only to products in a specific category?

Thanks
So I'm going to add this as an answer just in case others find it a useful option to pursue. 

I would create your fields; voltage, flow rate, etc. then I would create a Structure called Products with different Entry Types corresponding to the various categories you are using to sort your products. Then you can add your fields to the appropriate Entry Types. Then when you go to add a new product, you'll have a dropdown where you can select what Entry Type this entry should be. 

That's how I would setup your site structure if I were in your place