PETKIT Purobot Max 3 Self-Cleaning Litter Tray

Last updated: 12 October 2026

What the PETKIT Purobot Max 3 is

The Purobot Max 3 is PETKIT's third generation of automatic litter tray. Your cat walks into the drum, and a few minutes after it leaves, the drum turns. A sifter drops the clumps into the sealed bin and lets clean litter fall back, so you empty the bin instead of scooping.

Compared with the PETKIT PuraMax 2, the main changes are a low, wide entrance and a waste bin on the side rather than underneath. PETKIT's patented 360° ShieldBase also seals the base all the way round, for cats that wee high up the wall.

What the Purobot Max 3 does

• Automatic cleaning: the drum sifts and empties itself after each visit.
• Safety sensors: 12 sensors track weight and movement, and the drum stops at once if a cat steps in mid-cycle.
• Multi-cat tracking: the PETKIT app tells cats apart by weight and logs each one's visits.
• Smart Waste Covering: an optional setting that covers waste for cats that walk away without burying it.
• Quiet running: PETKIT rates it at 35dB.

Key facts

• Price: £599.99 from PETKIT UK, £469.99 on Amazon UK
• Waste bin: 7 litres, up to 15 days for one cat
• Size: 620 x 538 x 552mm, about as wide as a kitchen worktop is deep
• Entrance height: 204mm
• Weight: 10kg
• Cats: six months and older, from 1.5kg to 10kg
• Litter: clumping clay, tofu or mixed, with granules up to 12mm long and 3mm across
• Connection: 2.4GHz wifi
• AI camera: no, it recognises cats by weight only
• Rating: 4.3 out of 5 from 1,226 ratings on Amazon UK

How it compares with other PETKIT trays

All four trays below sift clumping litter into a sealed bin. The prices are from Amazon UK, apart from the Purobot Ultra, which Amazon UK was not selling, so its price is PETKIT's own.

If you want camera monitoring, the Purobot Max Pro 2 is the cheapest of these with a camera, at £70 more than the Max 3 on Amazon UK.

Running costs

• Litter: it needs a fast-clumping litter within PETKIT's size limits. We use KatKin Scoop Planet, a pea and millet litter.
• Bin liners: PETKIT does not sell a compostable liner for the bin. We use Toraphene compostable caddy liners, which fit it.
• N50 odour cartridge: about one a month, £27.99 on Amazon UK.
• Cylinder mat: roughly once a year, £39.99 on Amazon UK, and the same mat fits the PuraMax 2 and the Max Pro models.

Who the Purobot Max 3 suits

• Multi-cat homes: it logs each cat's visits and weight, so you can spot a change early and mention it to your vet.
• Bigger or short-legged cats: the low, wide entrance is easier to step into.
• People away for a weekend: one cat's waste fits in the bin for up to 15 days.

For a longer test, read our PETKIT Purobot Max 3 review.

The limits

There is no camera. If you want to see which cat is in the tray, you need the Max Pro 2 or the Ultra.

PETKIT's 15 days is for one cat. With two or three cats, you will empty the bin much more often.

It is not for kittens under six months or cats under 1.5kg, and crystal or non-clumping litter will not sift.

Some cats will not use a moving tray straight away. International Cat Care says self-cleaning trays can startle cats, and it advises one tray per cat plus one extra. So keep the old tray out during the changeover.

Where to buy it in the UK

Amazon UK had the Purobot Max 3 at £469.99, which is £130 less than PETKIT's £599.99. The full specification and litter guide are on the PETKIT Purobot Max 3 product page.

PETKIT Purobot Max 3 on Amazon UK

FAQs

How much is the PETKIT Purobot Max 3 in the UK?

£599.99 from PETKIT UK. On 12 October 2026 Amazon UK had it at £469.99.

Does the Purobot Max 3 have a camera?

No. It recognises cats by weight. The Purobot Max Pro 2 is PETKIT's cheapest tray with an AI camera.

How is it different from the PuraMax 2?

It has a lower, wider entrance and a side waste bin instead of one underneath. Both hold about 15 days of waste for one cat, and neither has a camera.

What litter can I use in the Purobot Max 3?

Clumping clay, tofu or mixed litter, with granules up to 12mm long and 3mm across. Crystal and non-clumping litters do not work.

Is the Purobot Max 3 safe for kittens?

PETKIT says it suits cats aged six months and over, from 1.5kg to 10kg. Its 12 sensors stop the drum if a cat steps in during a cycle.

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