Paper Checker PC300/210

Paper Checker PC300/210


The Paper Checker series can be used as a double-sheet detector for sheet-fed presses, as well as a web splice or break detector. These products can be used for a wide range of materials including paper, aluminum laminate, poly-laminate, and plastic.

Main applications of the Paper Checker PC300

  • Detection of web splices or breaks

    Rotary printing presses, slitters, laminators, coaters, winders
  • Prevents 2-sheet overlap

    Sheet-fed printing presses, laminators

Main applications of the Paper Checker PC210

  • Detection of web splices or breaks

    Rotary printing presses, slitters, laminators, coaters, winders, etc.
  • Prevents 2-sheet overlap

    Box-making machines, laminators



The Paper Checker PC300 and UH300 are a double-sheet feed detector developed specially for sheet-fed presses. Besides paper, it can also be used with aluminum laminate, poly-laminated paper, plastics and a number of other materials. It can also handle a wide range of thickness, and the thickness in use can be simply selected from a switch on the operation panel for easy changeovers. PC300 can detect double sheets of any material and prevents double sheets from being fed at once due to operator errors or omissions.

  • Non-contact detection system
  • No malfunction due to printed image or characters


The Paper Checker PC210 and UH200 detect a splice or breakage of a web in every process of a web. In addition, it detects the feeding of double sheets by a sack machine which should feed one sheet at a time. When an abnormality is detected in each application, it is indicated on the controller and the output relay is activated. This contact causes the alarm buzzer to sound and the alarm indicator to light, thus notifying the operator or stopping the operation.

  • Non-contact detection
  • Broad applicable range of web (sheet) thickness
  • All materials can be processed (paper, cellophane, aluminum foil, poly-laminate, etc.)
  • No malfunctions are caused due to a pattern or character printed.
  • Simultaneous detection of web splice and breakage
  • Color and material of a splice tape and splicing* have no effect on detection.
    (butt joint and overlap joint on splice detection)


PC300(Controller), UH300(Sensor)

Detecting method Non-contact detecting system
Application Double-sheet detector for sheet-fed press
Material type Paper, aluminum laminate, poly-laminate, plastics
Material thickness: 0.04 to 1.0mm
Input Synchronous signal, output reset signal
Operating speed 15000sph (max)
Power supply 100 to 240V AC, 50/60Hz
Power consumption 10VA (max)
Mess Controller 2kg,
Sensor 0.4kg (one pair, including cables)
Ambient temp. 0 to 50℃

PC210(Controller), UH200(Sensor)

Web splice detection

Web thickness 1μm to 0.8mm
Splice width 20mm or more
Line speed 1000m/min or less
Inter-lock input a-contact, rating: 5V DC, 10mA

Web break detection

Web thickness 50μm to 0.8mm
Line speed 1000m/min or less

Double-sheet feed detection

Sheet thickness 15μm~0.8mm

Common specifications

Power supply 100 to 240V AC, 50/60Hz
Power consumption 10VA
Contact output C-contact
Rating : 240V AC, 0.1 A
24V DC, 0.1 A
Weight Controller: 2kg
Sensor: 0.5kg (one pair)
Cable length 5 meter each
Ambient temperature 0 to +50℃

Contact Us

Please use this form to submit your inquiries, feedback and/or requests to NIRECO.

Tokyo +81-42-660-7358
Osaka +81-6-6190-5550