Automatic Litter Boxes That Detect the Smallest Cats

An automatic box that cannot feel a cat will cycle with the cat inside, so the lightest weight its sensor detects is the most important safety number on the spec sheet. Below it, most of these makers say to switch to a manual or kitten mode. The lowest published threshold is 2.2 lb, on the Neakasa M1 Lite Plus and 2 others. Weight is not the only protection: 17 of these 27 also have stated anti-pinch protection on the moving part, by sensor or by design.

How this list is ordered: Every box with a published minimum detection weight, ordered by that weight and then by the maker's minimum age. 27 of the catalog’s boxes qualify. 2 of them carry a maker safety notice, not a recall — Neakasa M1 Lite Plus, Neakasa M1 Plus — shown on the card and the model’s page.

NeakasaM1 Lite PlusOpen-top
1Neakasa
~$329
Neakasa M1 Lite PlusSafety notice
About $50 under the M1 Plus, the Lite Plus keeps the open top, the 11.23-litre bin and the 2.2-to-33 lb rating.
Safe to automate from
2.2 lb / 3 mo · anti-pinch
Type
Open-top
Automate from ~2.2 lb / ~3 months
NeakasaM1 PlusOpen-top
2Neakasa
~$380
Neakasa M1 PlusSafety notice
Neakasa's current M1 keeps the open top that made the original popular with owners of big cats, and rates it for cats from 2.2 to about 33 lb.
Safe to automate from
2.2 lb / 3 mo · anti-pinch
Type
Open-top
Automate from ~2.2 lb / ~3 months
3PETLIBRO
~$600
PETLIBRO Luma Smart Litter Box
PETLIBRO's only litter box arrives with a camera said to recognise up to ten cats and an entrance PETLIBRO lists at 17.4 inches without saying which way it is measured.
Safe to automate from
2.2 lb / 6 mo · anti-pinch
Type
Rotating drum
Automate from ~2.2 lb / ~6 months
ELS PETOrbitieRotating drum
4ELS PET
~$360
ELS PET Orbitie
ELS PET's globe claims a lot for its drawer: 12 litres and up to 20 days for one cat, level with PETKIT's Purobot Ultra for the longest one-cat claim among the drums here.
Safe to automate from
2.5 lb / 3 mo · anti-pinch
Type
Rotating drum
Automate from ~2.5 lb / ~3 months
ELS PETOrbitie AirOpen-top
5ELS PET
~$400
ELS PET Orbitie Air
The 2026 open-top Orbitie is built for big cats, with a 33 lb rating and a 16.1-inch-wide opening.
Safe to automate from
2.5 lb / 3 mo
Type
Open-top
Automate from ~2.5 lb / ~3 months
6PetSafe
~$400
PetSafe ScoopFree SmartSpin
Two PetSafe documents disagree about this drum.
Safe to automate from
2.5 lb / 6 mo
Type
Rotating drum
Automate from ~2.5 lb / ~6 months
OneisallCB01Open-top
7Oneisall
~$230
Oneisall Ease S1
For about $230, the Ease S1 claims numbers usually reserved for boxes twice the price: an 11-litre drawer, cats from 2.6 to 30 lb, and a two-year warranty.
Safe to automate from
2.6 lb / 6 mo
Type
Open-top
Automate from ~2.6 lb / ~6 months
8Whisker
~$599
Whisker Litter-Robot EVO
Whisker's entry model shrinks the globe to fit a 20.6-by-24.3-inch spot and drops the curtain lasers: its own FAQ says it relies on weight sensors to know a cat is inside.
Safe to automate from
3 lb / 3 mo
Type
Rotating drum
Automate from ~3 lb / ~3 months
9Whisker
~$699
Whisker Litter-Robot 4
Four years on, this is still the reference point everything else in the category gets measured against.
Safe to automate from
3 lb / 3 mo · anti-pinch
Type
Rotating drum
Automate from ~3 lb / ~3 months
10Whisker
~$799
Whisker Litter-Robot 5
Whisker's 2025 replacement for the LR4 keeps the same 22-by-27-inch footprint and entry but raises the rated weight to 30 lb and the cat count to five.
Safe to automate from
3 lb / 3 mo
Type
Rotating drum
Automate from ~3 lb / ~3 months
11Whisker
~$899
Whisker Litter-Robot 5 Pro
What the extra $100 over the LR5 buys is a pair of AI cameras: one identifies which cat walked in by face, the other looks down at the litter bed.
Safe to automate from
3 lb / 3 mo
Type
Rotating drum
Automate from ~3 lb / ~3 months
MeowantMW-SC01Rotating drum
12Meowant
~$220
Meowant MW-SC01
Meowant's original drum steps down just 4.8 inches to its entry, low enough for a short-legged or arthritic cat.
Safe to automate from
3 lb / 4 mo
Type
Rotating drum
Automate from ~3 lb / ~4 months
13PetSafe
~$550
PetSafe ScoopFree OpenSky
PetSafe's open-top design has no hood and no globe, so the cat never walks into an enclosure at all.
Safe to automate from
3 lb / 6 mo
Type
Open-top
Automate from ~3 lb / ~6 months
MeowantMW-SC10Open-top
14Meowant
~$460
Meowant MW-SC10
Meowant's 2026 open-top model pairs a 72-litre open structure with an 11.9-litre drawer, much larger than its enclosed drums get.
Safe to automate from
3.3 lb / 4 mo · anti-pinch
Type
Open-top
Automate from ~3.3 lb / ~4 months
15PETKIT
~$500
PETKIT Purobot Max Pro 2
PETKIT's camera drum puts a 1080p, 210-degree lens beside the entry and claims it can tell up to 15 cats apart, even two of similar weight.
Safe to automate from
3.3 lb / 4 mo · anti-pinch
Type
Rotating drum
Automate from ~3.3 lb / ~4 months
16PetSnowy
~$529
PetSnowy SNOW+
Most drums narrow the litter list; this one widens it, naming clay, silica crystal, tofu and clumping pine or plant litters as compatible.
Safe to automate from
3.3 lb / 4 mo
Type
Rotating drum
Automate from ~3.3 lb / ~4 months
17CATLINK
~$599
CATLINK Scooper Pro Ultra
CATLINK's camera model shares the Luxury Pro-X body, 65-litre globe and 13-litre drawer, then adds a 1080p camera, UVA and UVC sterilisation and a 5 GHz radio.
Safe to automate from
3.3 lb / 4 mo · anti-pinch
Type
Rotating drum
Automate from ~3.3 lb / ~4 months
MeowantMW-SC02Rotating drum
18Meowant
~$230
Meowant MW-SC02
At 19.3 inches square, the SC02 takes up less floor than almost anything else here while still offering a 75-litre drum.
Safe to automate from
3.3 lb / 4 mo · anti-pinch
Type
Rotating drum
Automate from ~3.3 lb / ~4 months
MeowantMW-SC09Rotating drum
19Meowant
~$650
Meowant MW-SC09 Plus
The biggest Meowant has a 106-litre drum and a 30 lb rating, matching the Litter-Robot 5 on paper, with an 8.27-inch entry step.
Safe to automate from
3.3 lb / 4 mo · anti-pinch
Type
Rotating drum
Automate from ~3.3 lb / ~4 months
CATLINKScooper Open-XOpen-top
20CATLINK
~$169
CATLINK Scooper Open-X
For about $169 this is the cheapest open-top box listed, and one of the cheapest boxes of any kind.
Safe to automate from
3.3 lb / 6 mo · anti-pinch
Type
Open-top
Automate from ~3.3 lb / ~6 months
PETKITP9905Crystal tray
21PETKIT
~$200
PETKIT Purobot Crystal Duo
This is PETKIT's answer to the ScoopFree: an open crystal tray, but with a camera that watches urination patterns and a 7-inch entry sill.
Safe to automate from
3.3 lb / 6 mo
Type
Crystal tray
Automate from ~3.3 lb / ~6 months
22PETKIT
~$400
PETKIT Purobot Max 3
PETKIT's third-generation drum, and the model its US store now redirects to from the old PuraMax 2 page.
Safe to automate from
3.3 lb / 6 mo · anti-pinch
Type
Rotating drum
Automate from ~3.3 lb / ~6 months
PETKITP9903Rotating drum
23PETKIT
~$800
PETKIT Purobot Ultra
Unlike PETKIT's other drums, the Ultra bags its own waste: each full load is heat-sealed from a refill ring, so emptying means lifting out a closed bag.
Safe to automate from
3.3 lb / 6 mo · anti-pinch
Type
Rotating drum
Automate from ~3.3 lb / ~6 months
24CATLINK
~$219
CATLINK Scooper SE Lite
About $40 less than the SE buys the same globe and 7-litre drawer with one fewer sensor: the microwave radar is gone, while infrared, weight and anti-pinch detection stay.
Safe to automate from
3.5 lb / 4 mo · anti-pinch
Type
Rotating drum
Automate from ~3.5 lb / ~4 months
25CATLINK
~$259
CATLINK Scooper SE
CATLINK pitches the SE at older cats with limited mobility, and the low, compact 21.5-inch body fits that.
Safe to automate from
3.5 lb / 4 mo · anti-pinch
Type
Rotating drum
Automate from ~3.5 lb / ~4 months
26CATLINK
~$400
CATLINK Scooper Young Pro-X
Strip the app, the radar and the infrared out of the Luxury Pro-X and what is left is this offline version with the same globe and 13-litre drawer.
Safe to automate from
3.5 lb / 4 mo · anti-pinch
Type
Rotating drum
Automate from ~3.5 lb / ~4 months
CATLINKScooper Luxury Pro-XRotating drum
27CATLINK
~$439
CATLINK Scooper Luxury Pro-X
Few boxes carry more kinds of sensor than this one: microwave radar, infrared, a scale, an anti-pinch strip and a start-up self-check.
Safe to automate from
3.5 lb / 4 mo · anti-pinch
Type
Rotating drum
Automate from ~3.5 lb / ~4 months

Automatic Litter Boxes That Detect the Smallest Cats

Neakasa M1 Lite PlusSafety notice

Neakasa M1 PlusSafety notice

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