How do you calculate optical sorter throughput?

Multiply tons fed per cycle by cycles per shift to get gross throughput, then multiply by availability and ejection accuracy. With 0.18 tons/cycle x 480 cycles = 86.4 gross tons, times 90% availability and 92% accuracy you recover 71.54 tons/shift.

What is the difference between gross and recovered throughput?

Gross throughput (86.4 tons/shift here) is everything the belt presents to the sorter. Recovered throughput (71.54 tons/shift) is what the sorter actually ejects into the target stream after downtime and misfires, so it is the number you can sell.

What is a good ejection accuracy for an optical sorter?

Well-tuned NIR sorters on a clean, presorted stream typically run 90-95% ejection accuracy on the target. The 92% used here is realistic; dropping below ~85% usually points to dirty optics, worn valve banks or overloaded burden depth.

Why is my recovered tonnage lower than the nameplate rating?

Nameplate ratings assume ideal feed and 100% uptime. In this example availability loss costs 8.64 tons/shift and ejection accuracy loss another 6.22 tons/shift, which is why 86.4 gross becomes 71.54 recovered.

How can I increase optical sorter throughput?

Raise availability (fewer jams, faster valve maintenance) and accuracy (clean optics, correct burden depth, even feed presentation) before pushing more tons per cycle. Adding feed without fixing accuracy just sends more material to the residue stream.

Does this calculator account for false ejections of good material?

No. It measures recovery of the target stream. False positives that pull non-target material into the product are a purity problem; pair this with a contamination rate check on the ejected stream.

Municipal Waste Sorting Equipment calculator

Optical Sorter Throughput Calculator

Optical sorter throughput tells a materials recovery facility (MRF) how many tons of target material a near-infrared or color sorter actually recovers per shift, not just how much it sees. Plant managers, recycling operations engineers and equipment vendors use it to size a sort line, validate guaranteed throughput in a supply contract, and spot when availability or ejection accuracy is quietly eating capacity. It matters because a sorter rated at 86 gross tons can deliver far less once you account for jam clearing, air-jet misfires and stream variability. Knowing the recovered number is what lets you commit to a daily tonnage to a downstream buyer with confidence.

What this calculator does

Estimate the good tons per shift an NIR or color optical sorter actually delivers after belt speed, availability, and ejection accuracy are factored in.
Use it when sizing an optical sorter for a fiber, container, or PET line and you need a throughput number that matches what the line will really hold, not the brochure rating.
It computes recovered tons per shift by multiplying gross feed throughput by sorter availability and by ejection accuracy on the target stream.

Formula used

Gross optical sorter throughput = tons fed per sorter cycle x operating cycles per shift
Recovered optical sorter throughput = gross throughput x sorter availability x ejection accuracy on target stream

Inputs explained

Tons fed per sorter cycle:
Operating cycles per shift:
Sorter availability:
Ejection accuracy on target stream:

How to use the result

Use it when commissioning a new optical sorter, troubleshooting a tonnage shortfall, or sizing line capacity before signing a material supply agreement.
It assumes a single dominant target stream and steady feed; highly variable burden depth, presort spikes or multi-pass configurations need a more detailed mass-balance model.

Current U.S. benchmarks

Steel mill PPI stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. New factory orders are up 2.3% year over year (Census).

Common questions

How do you calculate optical sorter throughput? Multiply tons fed per cycle by cycles per shift to get gross throughput, then multiply by availability and ejection accuracy. With 0.18 tons/cycle x 480 cycles = 86.4 gross tons, times 90% availability and 92% accuracy you recover 71.54 tons/shift.
What is the difference between gross and recovered throughput? Gross throughput (86.4 tons/shift here) is everything the belt presents to the sorter. Recovered throughput (71.54 tons/shift) is what the sorter actually ejects into the target stream after downtime and misfires, so it is the number you can sell.
What is a good ejection accuracy for an optical sorter? Well-tuned NIR sorters on a clean, presorted stream typically run 90-95% ejection accuracy on the target. The 92% used here is realistic; dropping below ~85% usually points to dirty optics, worn valve banks or overloaded burden depth.
Why is my recovered tonnage lower than the nameplate rating? Nameplate ratings assume ideal feed and 100% uptime. In this example availability loss costs 8.64 tons/shift and ejection accuracy loss another 6.22 tons/shift, which is why 86.4 gross becomes 71.54 recovered.
How can I increase optical sorter throughput? Raise availability (fewer jams, faster valve maintenance) and accuracy (clean optics, correct burden depth, even feed presentation) before pushing more tons per cycle. Adding feed without fixing accuracy just sends more material to the residue stream.

Last reviewed 2026-05-12.