Using Pulse Width Pin 2

To calculate the Time of Flight (ToF) pulse width for all of our LV-MaxSonar sensors use the scaling factor: 147uS/inch

The formula to convert from ToF (pulse width) is:
(ToF/147)=Ri
ToF = Time of Flight in uS (microseconds)
Ri = Range in inches

Please be aware that in order to avoid incorrect calculations ToF must be in the same unit of measurement.

If you are viewing your ToF output on an oscilloscope and have a reading of 13.23mS, you would use the formula:
(13230/147)=Ri . In this example Ri = 90

To calculate the ToF pulse width for all of our XL-MaxSonar sensors use the scaling factor: 58uS/cm

The formula to convert from ToF to distance is:
(ToF/58)=Rcm
ToF = Time of Flight in uS
Rcm = Range in cm.

Please be aware that in order to avoid incorrect calculations ToF must be in the same unit of measurement.

If you are viewing your ToF output on an oscilloscope and have a reading of 10.44mS, the formula would look like:
(10440/58)=Rcm. In this example Rcm = 180

The scaling factor for these sensors is 1uS/mm

For this sensor family if the pulse width is 5mS, the distance to the target ranged is 5000mm.
If the pulse width to the target is 2.7mS, the distance to the target is 2700mm.

In summary for the HR-MaxSonar sensors; the represented ToF output from the sensor is equivalent to the distance of the ranged target from the sensor.