PETKIT
PURA MAX 2
Waste capacity 8 L✓ Health monitoring✓ App control
4.9Editorial ratingFair value
4.5 Rakuten reviews2
≈$361
Near-zero scooping. Automatic hygiene and odor control.
Self-cleaning litter boxes run from an external power adapter. If its label says 100–240 V it works on both US 120 V and UK 230 V mains; a Japan-only 100 V adapter does not. Buy the US or UK version anyway: warranty, a replacement adapter and consumables such as liner bags and rubber seals are only stocked for the local model.
Most models are designed for clumping litter; crystal (silica), pellets and non-clumping litter jam the drum or fall through the sieve. Plant-based litters (tofu, corn, wheat) clump but are lighter, so only models that explicitly list them in the specification handle them reliably. The “Litter type” row on each product page lists what is allowed.
In the US and UK, used cat litter belongs in general waste. Do not flush it, even litter sold as “flushable”: water companies advise against it, and California requires litter packaging to carry a warning about flushing. For an automatic box, size the waste drawer against your collection day so it is not full before the bin goes out.
These machines detect the cat with a weight sensor and start cleaning only after it has left. Kittens below the maker's minimum weight are not detected reliably; the “Minimum weight” row in the specification gives the figure. With a young kitten, keep automatic mode off until it reaches that weight.
A minimum cat weight applies for the safety sensor, roughly 1.0–2.3 kg depending on the model. For kittens, pick a box with a low minimum (e.g. PETKIT PURA MAX from ~1.0 kg).
Most require clumping mineral litter. Some support tofu litter (e.g. PETKIT PURA MAX). Always check the supported litter before buying.
Beyond a sealed waste drawer, many use deodorizing units or UV sanitizing. A larger waste capacity means less frequent emptying.