The Siemens 3RG7421-0AA00 is a SIMATIC PXO320 K21R retro-reflective photoelectric sensor with a polarisation filter, built for reliable detection on shiny or reflective targets. It runs on DC 10-30 V, switches PNP dark-on at 150 mA, and reaches out to 3 m. The 2 m PUR cable with 3x0.14 mm² conductors and an IP68 rating mean it handles washdown and wet-area installs — think conveyor lines, packaging, or brewery bottle lanes. The M18 optics thread into standard brackets, so swapping an old cylindrical sensor into this footprint is straightforward.
Siemens 3RG7421-0AA00 Retro-Reflective Sensor, EOL Hot
MPN3RG7421-0AA00
End of Life
Siemens SIMATIC PXO320 K21R retro-reflective sensor, 31x20x12 mm, DC 10-30V, 3 m range, PNP dark-on, 150 mA, cable 2 m PUR, IP68, M18 optics.
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Independent China distributor & sourcing agent· Listing updated Sep 2026
Product details
Frequently asked questions
What are the key ratings of 3RG7421-0AA00?
DC 10-30 V supply, PNP dark-on output at 150 mA, 3 m sensing range with polarisation filter, 2 m PUR cable, IP68 protection, M18 optics.
MPN
3RG7421-0AA00