Scooper Luxury Pro XCATLINK
- Min cat
- 1.58 kg
- Max cat
- 10 kg
- Entry height
- 35.5 cm
- Entry opening
- 33 x 27 cm
Cat weight limits and entry heights
A cat that does not fit, or will not climb in, is the single biggest cause of a returned automatic litter box. Manufacturers publish these limits, but never together and rarely anywhere near the buy button. Here they are in one table.
Weight limits and dimensions checked
| Model | Min cat | Max cat | Entry height | Entry opening |
|---|---|---|---|---|
| Scooper Luxury Pro XCATLINK | 1.58 kg | 10 kg | 35.5 cm | 33 x 27 cm |
| 4Litter-Robot | 1.36 kg | not published | not published | 40 x 40 cm |
| Purobot UltraPETKIT | 1.5 kg | 10 kg | 26.5 cm | not published |
| Crystal (disposable tray)PetSafe ScoopFree | not published | not published | not published | not published |
4Litter-Robot
- Min cat
- 1.36 kg
- Max cat
- not published
- Entry height
- not published
- Entry opening
- 40 x 40 cm
Purobot UltraPETKIT
- Min cat
- 1.5 kg
- Max cat
- 10 kg
- Entry height
- 26.5 cm
- Entry opening
- not published
Crystal (disposable tray)PetSafe ScoopFree
- Min cat
- not published
- Max cat
- not published
- Entry height
- not published
- Entry opening
- not published
The minimum is the number that catches people out. These boxes know a cat has visited because the cat's weight registers on a sensor. A kitten under the stated minimum may not trigger a cycle at all, which means the box quietly stops working as a box. If you are buying for a kitten, you are buying for the cat it will be in six months, and using a manual tray in the meantime.
Entry height, ranked
Step-up height is the specification we would put first if we could only publish one. In ascending order of difficulty for an older or smaller cat:
- PETKIT Purobot Ultra, about 26.5cm. The lowest step of the three, and PETKIT markets it that way.
- CATLINK Scooper Luxury Pro X, 35.5cm. The highest. CATLINK sells a ramp set separately, which tells you it is a known issue.
- Litter-Robot 4, not published. Whisker gives the entry opening as 40cm by 40cm but does not state the step-up height, which is an odd omission on the dearest unit in the category.
What we could not source
Whisker publishes no maximum cat weight for the Litter-Robot 4, and no step-up height. PetSafe publishes neither weight limits nor entry height for the Australian ScoopFree. In both cases the table says "not published" rather than borrowing a number from a United States review of a different revision of the product.
Common questions
What is the weight limit on an automatic litter box?
The limit that matters is usually the minimum, not the maximum. Automatic boxes use a weight sensor to know a cat has been and gone, and below the stated minimum the box may not register the visit and may not cycle. The Litter-Robot 4 states 1.36kg, PETKIT 1.5kg and CATLINK 1.58kg. Maximums are less consistently published: PETKIT and CATLINK both state 10kg, while Whisker publishes no upper limit for the Litter-Robot 4 and says only that larger cats fit.
Why does entry height matter more than the weight limit?
Because it is the thing that makes a cat refuse the box, and refusal is what gets a unit returned. A step-up of 35cm is a jump for a kitten, an older cat with arthritis, or a cat recovering from surgery. The CATLINK entrance sits at 35.5cm, the highest of the three, while the PETKIT entry is around 26.5cm. Ramps are sold for some models and are worth budgeting for.
Will a large cat fit an automatic litter box?
Physically, usually yes: the chambers on all three drum-style units are generous. The catch is that a large cat needs room to turn around and dig, not just to fit, and a cat that feels cramped will go elsewhere. Check the entry opening as well as the chamber, and if your cat is over about 6kg treat a hooded manual tray as a realistic fallback.