An electrically-powered orthopaedic device intended for measurement of the forces within the knee joint during a total knee arthroplasty (TKA) to assist with further planning of the procedure. It is typically a hand-held device with prongs to push against the adjacent joint surfaces, with an integrated sensor for measuring the force applied and relaying the data to a disposable cable/converter (not included) for digital conversion and transmission to a computing device for display. This is a reusable device.