Rotating drum~$400

PETKIT

PETKIT Purobot Max 3

Name: PETKIT Purobot Max 3
Brand: PETKIT
Price: 400 USD
Availability: InStock

Automate from ~3.3 lb / ~6 monthsAnti-pinch protectionRated to 22 lb — short of the heaviest large breeds

PETKIT's third-generation drum, and the model its US store now redirects to from the old PuraMax 2 page. The entry sill drops to 8 inches, about two lower than the Max Pro 2, and the camera is gone. PETKIT's own page quotes the noise as 35 dB in one place and 45 dB in its FAQ, so this site prints neither.

Approx. price

~$400

maker's store, not a live price

Kitten gate

3.3 lb / 6 mo

detects cats from 3.3 lb; maker's minimum age 6 months

Days between emptying

~10 days

one cat, from the drawer volume

Max. cat weight

22 lb

10.51-inch-wide entry, tight for a big cat

Running cost

No consumable

Runs on clumping litter from any brand the maker allows

Warranty

2 yr

standard, before extensions

Best for: One or two cats under 22 lb, especially older cats that struggle with a high step

Check price on Amazon

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Kittens and small cats

PETKIT says the sensor detects cats from 3.3 lb and sets a minimum age of 6 months. At the usual rate of about a pound a month, that means leaving automatic cleaning off until roughly 6 months. Below the threshold, a kitten may not register at all, and the box could start a cycle with it inside.

Detection: weight, infrared / radar. The maker states anti-pinch protection on the moving part, by sensor or by design.

How minimum weights work, and what to do below them

Days between emptying

1 cat: ~10; days
2 cats: ~5; days
3 cats: ~3; days

7 L ÷ (cats × 0.7 L a day). The maker claims up to 15 days for one cat, which is more generous than this arithmetic supports. Where 0.7 L comes from.

Specifications

Approx. price: ~$400
Type: Rotating drum
Kitten gate: Automate from ~3.3 lb / ~6 months
Min. detection weight: 3.3 lb
Maker's minimum age: 6 months
Max. cat weight: 22 lb
Big-cat fit: Rated to 22 lb — short of the heaviest large breeds
Entry opening: 10.51 × 10.74 in
Entry step: 8.03 in off the floor
Footprint: 24.4 × 21.2 in × 21.7 in tall
Drawer volume: 7 L
Days between emptying: ~10 / 5 / 3 days for 1 / 2 / 3 cats
Maker's drawer claim: Up to 15 days, one cat
Litter system: Clumping litter
Litters listed: clumping clay, tofu, mixed
Litters to avoid: non-clumping
Weight sensor: Yes
Anti-pinch protection: Stated by the maker
Infrared / radar: Yes
Camera: No
Wi-Fi app: Yes
Running cost: No required consumable
Bags / liners: PETKIT automatic litter box trash bags ($29.99 for 5 rolls)
Warranty: 2 years
First listed: 2026

Features

Low 8-inch entry sill
12 sensors and an incomplete-gear drum
7-litre side bin, up to 15 days for one cat
Clay, tofu or mixed clumping litter
Two-year warranty

What it does well

Lowest entry sill of PETKIT's drums
About $100 cheaper than the Max Pro 2 for the same drum and gear design
Handles tofu and mixed litters that Whisker rules out
Suitability is stated plainly: 6 months and 3.3 lb or more

What it gives up

Two conflicting noise figures on the maker's own page
22 lb ceiling
A 7-litre bin is a litre smaller than the Max Pro 2's
Joins 2.4 GHz Wi-Fi only

The two lists above are drawn from the maker’s own pages, manuals and prices, not from owner reports. Where owner discussion has been read it appears in its own section below, so the two are never mistaken for each other.

What owners say

The Max 3 is PETKIT's replacement for the PuraMax 2, and the two changes early owners praise are the lower entry and the odour handling. One owner finds the step noticeably easier for their cats than the Max Pro 2's, another likes that no stairs are needed, and four owners say smell has stopped being an issue. One owner's two cats picked it over a Litter-Robot 4 in the same house on the first day.

The complaints are about edges rather than the drum itself. One first-time owner smelled waste from day one and found the bin compartment leaky, which is the opposite of what the others report. The base and premium versions confuse buyers: only the premium includes the Breezy odour eliminator and the housing for its N60 cartridge, and owners of the base version found that out on delivery. False full-bin and visit alerts, no help with tracking and the missing camera round out the list.

Every report so far is from the first weeks or months, so nothing is known yet about how the drum, sensors or seals hold up over a year. For a cat that struggles with a high step, or a household that does not want a camera, it is the PETKIT drum to look at; anyone who wants visit footage of a sick cat should look at the Max Pro 2.

What owners like

The lower entry is the change owners notice: one says it is noticeably easier for their cats than the Max Pro 2, and another, coming from the original PETKIT, likes that no stairs are needed
Four owners say odour control is the reason they are happy with it, from "haven't smelled anything since it came out" to a single-cat household on tofu litter reporting no smell at all
Cats can take to it fast: one owner's two cats used it on the first day and stopped using the Litter-Robot 4 in the same house, one of which had never used the LR4 at all
Owners run it on tofu litter, a World's Best and clay mix, and a cheap very fine clumping litter, with no sticking reported so far
The setting that covers waste with litter before the drum turns gets singled out, by an owner whose cat does not bury and another who uses it for stinky stools

Common complaints

One owner a week in says it smelled from the first day, while idle and not just when cycling, and that the waste compartment does not seem airtight
The base version ships without the Breezy odour eliminator and without the housing its N60 cartridge sits in, so a third-party cartridge cannot be fitted; two buyers only discovered this after it arrived
Running both deodorisers means buying cartridges for each regularly, which one owner who otherwise loves the odour control calls not cheap
False alerts: one owner gets a full-bin message even after changing the liner, and another gets a visit notification when a nervous cat only puts its front paws in
It does nothing about tracking, so owners rely on a mat outside the entry
There is no camera, and owners who wanted visit footage for a sick cat steer others to the Max Pro 2 instead

Questions owners ask about the PETKIT Purobot Max 3

What is the difference between the base and premium Purobot Max 3?

Owners comparing the two say the drum is the same. The premium version adds the Breezy smart odour eliminator, which uses N60 cartridges, plus a floor mat and an extra set of bags. The base version lacks the housing the N60 cartridge sits in, so you cannot add a cartridge later without that accessory; it still takes the smaller N50 block in the bin.

Should I get the Max 3 or the Max Pro 2?

Owners split on the camera. The Max 3 has the lower entry, which PETKIT puts at 8 inches against 10 on the Max Pro 2, and one owner comparing the two calls it slightly quieter. The Max Pro 2 keeps the camera, which three of its owners credit with spotting a constipated or sick cat, and a slot that seals the bag before the drawer comes out.

Will my cat use it?

Early owners report both. One owner's two cats used it on the first day and one of another owner's two kittens went straight in, while two owners had a nervous cat that held back. Where a cat was nervous, owners kept the old box beside it and stopped scooping the old one, put the cat in and scratched the litter, or held back the larger deodoriser for the first weeks in case the new smell put the cat off.

Does the Max 3 work with the Pura Air?

No. PETKIT has said the Max 3 is not compatible with the Pura Air and points owners to the Breezy odour eliminator instead, which is included with the premium version.