Municipal Waste Sorting Equipment worked example

Optical Sorter Sensor Cleaning Interval at 18% access, glass swap, and recalibration allowance: a worked example

This worked example runs the optical sorter sensor cleaning interval numbers for a tougher week than the baseline: 18% access, glass swap, and recalibration allowance instead of the typical 25%. Estimate the minutes needed for a scheduled NIR or color sensor cleaning round across the sort line so accuracy stays inside spec.

The inputs for this scenario

  • Optical sensor stations to clean: 12 stations (held at the documented default)
  • Stations cleaned per minute per technician: 0.1 stations / min (held at the documented default)
  • Access, glass swap, and recalibration allowance: 18 % (the input this scenario stresses; the baseline uses 25)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base sensor cleaning time = sensor stations / cleaning rate per technician.
  • Required sensor cleaning time works out to 142 min at these inputs, and this is the headline figure for the scenario.
  • Base sensor cleaning time works out to 120 min at these inputs.
  • Access and recalibration allowance applied works out to 18 % at these inputs.
  • Cleaning rate per technician works out to 0.1 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where access, glass swap, and recalibration allowance sits at 25% and the headline result is 150 min, this scenario comes in 5.6% below the baseline at 142 min.
  • Use it when planning a scheduled-downtime cleaning sweep or estimating how many sensor stations a tech can service inside a maintenance window. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Required sensor cleaning time: 142 min (headline result)
  • Base sensor cleaning time: 120 min
  • Access and recalibration allowance applied: 18 %
  • Cleaning rate per technician: 0.1 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Optical Sorter Sensor Cleaning Interval calculator, set access, glass swap, and recalibration allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.