I Need a replacement for obsolete through beam sensor SH-31R from Panasonic Industrial Automation Sales.
Digi-Key Part number 1110-2059-ND
Manufacturer part number SH-31R
Data Sheet
For a very similar component that could replace, take a look :
Digi-Key Part number 1110-4437-ND
Manufacturer part number SH-33R
Data Sheet
See the side by side comparison , view the data sheest and product information pages to make sure this is the right choice for your application.
For more great offerings from Panasonic, visit their supplier page on Digi-Key.com