I have a powered scoop free cat litter tray on offer. The unit senses when the cat enters the tray and when they leave. It will wait a few minutes after the cat has left in case they return, which they sometimes do, and will then start the removal process by way of the rake. The waste is pushed under a cover so elimantes odour.
The disposable trays and litter can be bought on amazon, pets at home (online only) and argos.
It is more cost effective however to use a reusuable tray and just buy the litter. It has to be non-clumping litter though. Preferably crystals. I do have one disposable tray, and a bag of litter, which will go with the tray to get you started. Each fill of the tray will last approx 4-6 wks without needing to be touched. I have cleaned and disinfected the tray. Thanks for reading.

Automatic scoop free cat litter tray (Fareham PO15)