[Al Skierkiewicz]

Raf,
You don't say whether you are using the PNP or the NPN part. If my translation of the manual is correct either of these devices will work down to 12 volts. (10-30 volts) Depending on which device you use will modify the circuit a bit. The interface shown above with the zener diode will work well for your application. You may also get goos results using a resistor voltage divider or a simple transistor switch as an output of the sensor you are planning. I would expect that the manufacturer would have an application note on interfacing these to a five volt system. Generally, NPN devices provide a closure to ground rather than a closure to power supply. These may be easier to interface than the PNP output.