Abstract: An optical readout device for providing visual circumference and diameter readings of an object being measured by a linear tape. The tail end of the tape passes by a reader element in a digital device which is equipped electronically with the pi conversion factor to provide selective readings of diameter in English and metric units, as well as circumference readings. The device can be employed for external (outside) and internal (inside) measurements.
Abstract: A linear measurement device for digitally providing circumference and diameter readings of an object being measured. The tail end of a tape passes by a reader element in a digital unit which is equipped electronically with the pi formula to provide selective readings of diameter in English and metric units, as well as circumference readings. The device can be employed for external (outside) and internal (inside) measurements.