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Case Study: Knock Sensor Supply for a marine equipment dealer in North America

Source:Case / Time:2026-09-18

Knock Sensor for A marine equipment dealer in North America

A marine equipment dealer came to us with a knock sensor programme for North America. The brief was ordinary and unforgiving at the same time: a fixed launch window, a landed cost that had to survive freight and duty, and a part that had to match an existing sample. This case records what was specified, what went wrong in sampling and how the bulk order landed.

The starting point

  • Inconsistent hardness between lots
  • Warranty claims traced back to a single lot
  • Packing that arrived crushed at the port

Knock Sensor case study

What was specified

PartKnock Sensor
ClientA marine equipment dealer
MarketNorth America
Volume5,000 pieces across 6 specifications
Base materialCarbon Steel
Sampling rounds2
Delivery window8 weeks from PO to ex-factory
ComplianceRoHS

How it was resolved

  1. The specification was rebuilt around Carbon Steel and the tolerance locked before bulk.
  2. A pre-production sample was approved and kept as the golden reference.
  3. Production ran with in-line inspection and a mid-run photo report.
  4. Cartons were packed to the client's own barcode and ratio specification.
  5. Documentation shipped with the goods instead of after them.

Knock Sensor production run

Result

  • 5,000 pieces delivered inside the 8-week window.
  • Unit cost held within 3.0% of the original quotation.
  • Inspection-related rejection stayed under 1.5%.
  • The specification is on file, so reorders reproduce the approved sample.

What we would repeat

Lock the material standard before sampling. Once the base changes, every downstream approval has to be redone and the calendar slips.

Planning something similar?

Send the specification you are working to and we will confirm what we can match, what we would change and why.

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