I want to test motorcycle hand pedal force.which factory have such professional transducer?

Answer 1

I never heard of such a thing. How would a "fish scale" be?
http://www.wholesale-scales.com/index.php?main_page=index&cPath=138&zenid=50305750f79dc64ee4d07f65996e66c9
Click - Fish Scales (on the left)
Click the picture of one of the digital fish scales to see a detailed view and description.
I think what you're looking for is a "reverse torque wrench". Like I said, I've never heard of such a thing. If you do find one, tell me where to get it.