Inverted Blank Detector

IS621 / IS631

Reliably detects an inverted 3-piece can body with lacquer on the wrong side

The only sensor on the market that helps to prevent the formation of inside-out cans

IS621 / IS631 Inverted Blank Detector

Benefits – Reduce Risk of

  • Customers with pallets of rusty cans
  • Consumers with contaminated products
  • Costly returns
  • Loss of business
  • Loss of reputation

IS621 – Detects white coatings and gold varnishes, but not clear ones.

IS631 – Detects white coatings and gold varnishes, also detect clear lacquers.

Note: These sensors will perform as “inside-out can” detectors if body blanks are coated on one side only.

Problems from Inverted Body Blanks

If coated sheets or ‘body blanks’ are put back into the process upside down, the resulting cans will come out of the welder with their protective coating on the outside not on the inside.

Unique Innosen Sensors

Innosen’s IS631 and IS621 are the only available sensors that allow you to reliably find those “inside-out” cans with lacquer on the wrong side impossible with any other currently available sensor.

Clear lacquer and varnishes

Detecting clear lacquers on metal sheet at line speed is particularly challenging. The highly specified IS631 Inverted Blank Detector has been specially developed to meet that need, while still detecting white coatings and gold varnishes.


  • Self-adjusting and self-calibrating, therefore no need for operator intervention
  • Detects when a changeover occurs and learns the new lacquer characteristics
  • Reject signal for missing lacquer to initiate user defined response
  • Heartbeat signal for every sheet guarantees the sensor is always working, guarding your equipment and reputation
  • The heartbeat signal may be used as a sheet counter for process monitoring

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