SR21, Sensors



SR21 fork sensor offers high resolution, high speed and very short response time in precise label detection


Slot width 2mm and depth 50 mm for label detection Very fast 20 µs resp. time and 25 kHz switch. freq. Auto-Set for teach-in or dynamic threshold setting

20x90x26 mm 3mm slot width



IR LED emission for label detection on translucid reel Red/Green LED emission for colour mark detection

NPN and PNP outputs with M8 4-poles connector


Compact and robust ZAMA metal case

Teach In


SR21 offer high resolution, high speed and very short response time in precise label positioning, applying and printing, even with very fast machinery and process

Videos and Images

Downloads for SR21

SR21 Instruction Manuals
01/12/2017 - SR21_slotsensors_manual_DEU
Rev D (.pdf, 0,08 Mb)
01/12/2017 - SR21_slotsensors_manual_ENG
Rev D (.pdf, 0,08 Mb)
01/12/2017 - SR21_slotsensors_manual_FRA
Rev D (.pdf, 0,08 Mb)
01/12/2017 - SR21_slotsensors_manual_ITA
Rev D (.pdf, 0,08 Mb)
SR21 Series Datasheet
01/08/2016 - DS-SR21_SERIES-ENA4
(.pdf, 0,51 Mb)
09/08/2016 - DS-SR21_SERIES-IT
(.pdf, 0,51 Mb)
CE378_0 - SR21
01/01/2017 - CE378_0 - SR21
(.pdf, 0,03 Mb)
UL - SR21_SR23
16/03/2017 - UL - SR21_SR23
EAC - Sensor-LightCurtains_NegativeLetter
26/06/2015 - EAC - Sensor-LightCurtains_NegativeLetter
(.pdf, 0,33 Mb)
SR21 Drawings
05/04/2013 - SR21_slotsensors_PDF
(.pdf, 0,04 Mb)
05/04/2013 - SR21_slotsensors_DWG
(.zip, 0,05 Mb)
05/04/2013 - SR21_slotsensors_IGES
(.igs, 0,98 Mb)
New Products Brochure 2018 ~ Lo Res
05/12/2017 - New Products Brochure 2018 ~ English A4
Brochure-New_Products-ENA4.pdf Rev A (.pdf, 1,87 Mb)
11/05/2018 - New Products Brochure 2018 ~ Russian
BR-NEW_PRODUCTS_2018-RU Rev A (.pdf, 2,01 Mb)
Sensors Product Guide
23/06/2016 - PG-Sensors-ENA4
(.pdf, 2,72 Mb)
03/03/2016 - PG-Sensors-DE
(.pdf, 2,74 Mb)
23/06/2016 - PG-Sensors-IT
(.pdf, 2,77 Mb)
23/06/2016 - PG-Sensors-ZH
(.pdf, 2,38 Mb)
Photoelectric Sensors Catalog
23/03/2016 - CATALOG-PhotoelectricSensors-ENA4
(.pdf, 34,62 Mb)
20/06/2016 - CATALOG-PhotoelectricSensors-IT
(.pdf, 35,19 Mb)

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