SR21 Series

Key Features

  • High 25kHz switching frequency
  • Red/green light models
  • Detection of semi-tranparent labels
  • 4-wire independent NPN and PNP output


The SR21 series slot sensors, with a 2mm slot width, provide a 12-bit (4096 step) resolution, a 20μs response time and a switching frequency of 25kHz.

The setting of the switching threshold is carried-out by simply pressing a button, or dynamically during label (or other reference) movement. The SR21-RG model with double red or green light is ideal for print registration mark detection on transparent films for automatic packaging.

Description File Type File Size Download
IDEC DataLogic Short Form Catalog PDF 2.2MB Download
Sensor Catalog PDF 9.32MB Download
Quick Selection Guide PDF 600KB Download
IDEC DataLogic Sensor Catalog PDF 8.7MB Download
Sensor Cross Reference PDF 132KB Download
Catalog PDF 205KB Download
Datasheet PDF 111KB Download
Instruction Sheet PDF 99KB Download