Uno, signal conditioning and an optical sensor

Using Arduino Project Guidance
8

pylon:
My reference document is from here: https://mysick.com/saqqara/im0007888.pdf, where is your's?

There is only an output voltage (nothing about current output), so if in doubt I'd use the voltage divider.

Here's mine: https://www.mysick.com/eCat.aspx?go=FinderSearch&Cat=Gus&At=Fa&Cult=English&FamilyID=376&List=1&Category=Produktfinder&Selections=42939

Is this likely to be OR can it be correct given that your reference states Volts...

I've been trying to measure the analogue outputs to no avail but am wondering whether the cheap transformer I'm using (and lack of knowledge) could be leading me astray. The multimeter shows this 12V unit giving out 18V and I'm wondering whether its not very smooth. If the Sick does vary current in line with different greyscale values detected, what is the implication?

A few hours later: Have spoken to Sick and it is being verified.

Result: Sick confirmed spec should give voltage not current.

Thanks.