I got my first one through the medical lab at the hospital where I used to work. Cost several hundred dollars. Have bought 2 more through e-bay and have been very happy with them. Look for a honey refractometer - brix around 58 to 90 - should do what you need it to for pates de fruit. Ordering one directly from Hong Kong was the best deal. I had one that was defective and they took it back and replaced it with no difficulty.
Kerry- are the ones you use digital? I must confess to never having used one. But we are making sorbets now and I want to make them w just fruit and simple syrup and need it for that. Not sure what to get.
Nope - they are the kind where you put a drop of liquid on the glass, flip the piece of plastic down on it and hold it up to the light to see where the line falls. A bit tricky - digital would certainly be easier.