  The innovation process is always required to produce more advanced technology
and increasing productivity. PDM (Probes Distance Meter) comes as a
technological innovation in measurement, PDM is a digital distance measuring
instrument uses a pair of probes. PDM consists of ultrasonic transducers, a
microcontroller, and screen which shows the measurement result. PDM utilizes
ultrasonic wave principle by using two probes as reference points. A
microcontroller is used for performing calculation that uses the distance
equation. Innovation and Excellence of PDM are simple, ergonomic, modern, and
able to show the measurement result automatically. PDM has additional features
those are the storage media to save the measurement result with a micro-SD
card, sound generation, and braille for the blinds. Those tools are expected to
be suitable for common people, academics, or technicians to perform the
measurement. The results from the laboratory testing show that the prototype of
PDM has resolution of 1 cm, full scale of 200 cm, 11.1% repeatability, 77.6%
accuracy, and a nonlinearity parameter of 0.16%. PDM is in development and it
is potential to be a model of digital measuring instrument in the future that
is simple, fast, and its additional features are capable to be used by the
blind.
