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Available Features

SR21 Slot Sensor

The slot photoelectric sensors of the SR21 series, with 2mm slot width, are characterized by a high 12 bit (4096 steps) resolution, a low 20µs response time and a switching frequency reaching
25kHz. The setting of the switching threshold is carried-out automatically by simply pressing a push-button, or dynamically during label (or other reference) movement. The SR21-IR model with infrared emission is ideal for label or hole detection on continuous surfaces, while the SR21-RG model with double red or green emission suits color print register mark detection on transparent films for automatic packaging.

Features & Benefits

  • Teach-in setting: easy and fast setting procedure
  • Dynamic setting: possibility to set the sensor while the labels film is moving
    12 bit resolution: high detection reliability for a precise reading
  • 25KHz switching frequency: high detection repeatability
  • Red/Green emission model: possibility to perform contrast application


This product series has been developed to satisfy to requirements of the following reference applications:

  • Packaging lines
  • Labeling machines
  • Paper and Printing machines
Prices below
There are 2 models to choose from


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Find your perfect model

Label sensor infra red pnp/npn - M8
Part Number 953151070
RRP: £107.60
Label sensor red/green pnp/npn - M8
Part Number 953151080
RRP: £121.00
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