Clear Plastic Goniometers are calibrated for ISOM accuracy in measuring ROM. One arm has a linear scale in both inches and centimeters.
8″ model is marked in 5″ increments. 12″ model is marked in 1″ increments.
Finger goniometer’s arm has a linear scale in inches and centimeters and remains at measurement position until reset. Angle scale reads 1° increments.