"American 3B Scientific"

Motion in its total range can be read from the LED panel, after the joint has been taken through the digital inclinometer. Place the inclinometer near the joint to be measured.
Press "zero" button. Move joint through its range. "HOLD" button.

This baseline bubble inclinometer accurately measures complete range of motion. Measurement techniques are codified in the AMA guide to the evaluation of Permanent Impairment, third edition.