The RCA includes two contact tips (concave and convex) and a 10 cm linear contact wheel. It is compatible optional 12 in. Linear Wheel is also available (sold separately).

With the PLT200 Tachometer, measurement of units in addition to Revs requires the attachment of the Remote Contact Assembly (RCA) and tips/wheels. With this attachment, the tachometer can measure RATE inputs-revs, inches, feet, yards, centimeters, and meters either per second, per minute, or per hour, as well as miles per hour.