Pinhole inspection unit

C12570 series

The C12570 series is designed to inspect pinhole defects in aluminum laminated film and metal foil. Among pinhole inspection units for film, the C12570 series has the highest sensitivity capable of pinhole detection down to 2 μm in diameter making it ideal for strict inspection applications where no pinholes are allowed and where precise inspections are a higher priority than high-speed conveyance.


  • Minimum detectable pinhole size : 2 µm
  • Detection width (per unit) : 450 mm
  • Maximum detection speed : 30 m/min

Detection principle

C12570 principle of operation


Parameter Description / Value Unit
Suffix -01/-11 -02/-12 -03/-13
Input voltage (DC) 24 V
Maximum current consumption 0.8 A
Detection unit Detector Photomultiplier tube
Detection width 300 150 450 mm
Number of channel 2 1 2
Light source unit Light source / Wavelength LED/644 nm
Operating temperature range +10 to +40 °C
Storage temperature range -20 to +50 °C
Operating / storage humidity range 35 to 85 (no condensation) %RH
Applicable standard IEC 61326-1 Group 1 Class A

* Detection pinhole size depends on light intensity and installation environment.
* Accessories: I/O socket, light source cable (0.3 m), pinhole plate, optical pinhole (2 μm dia.)

Application example

C12570 application example

Dimensional outlines (Unit mm)

C12570 dimensional outline

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