New for 2014, the ENFORCER load cell by Rock Exotica is a must have equipment for any professional rigger, and most aerial artists should also have one.
It allows the user to get an output of the force in a certain point of a rigging system. You can also use this part as a swivel in the rigging system and leave it permanently due to it's small size and no cable attachments. A blue tooth connection to your Smartphone or other device will give real time readings of the force applied.
Note: iPhone in images not included of course! -- Travel Case Included
See this video on this incredibly useful and well built load cell