how can I measure accurate power in my test rig when there is no room to add an inline transducer?

You can use existing components to become an accurate inline torque transducer, Datum Electronics FF425 transducers are a range of flanged coupling spacer transducers that can replace your existing coupling spacers and give you real time accurate Torque, Speed and Power data from our standard range.  Our specialist team can even work with you and the existing spacers that you have and turn these into Torque Transducers.  With Datum Connect you can use your smart phone or smart device to wireless view and log accurate Torque, Speed and Power seamlessly.