Whisker Litter-Robot 4
Whisker Litter-Robot 4 is a rotating globe box for cats of 3 to 25 lb, as claimed. Its sources confirm 6 of 6 safety layers: weight sensor, entry sensor, anti-pinch, open entry, cycle delay, stop button.
Spec sheet
Manufacturer claims, not our measurements. Small numbers lead to the source list at the bottom of the page.
- How it cleans
- Rotating globe1
- Entry
- Open, nothing closes1
- Minimum cat weight, claimed
- 3 lb (1.4 kg) claimed1
- Heaviest cat
- 25 lb (11.3 kg) claimed2
- Cats per unit
- 4 claimed2
- Entry height
- 12 in (30.5 cm) claimed1
- Width
- 22 in (55.9 cm) claimed1
- Depth
- 27 in (68.6 cm) claimed1
- Height
- 29.5 in (74.9 cm) claimed1
- Unit weight
- 24 lb claimed1
- Litter it takes
- clumping litter (clay-clumping recommended); litter beads/crystals small enough to pass the screen1
- App
- Whisker app1
- Weight sensor
- Yes1
- Entry presence sensor
- Yes (laser curtain)3
- Anti-pinch
- Yes1
- Shortest delay before cleaning
- 3 min1
- Stop button on the unit
- Yes1
- Bags and filters
- Any bags or litter1
- Warranty
- 12 months2
- Drawer lasts, one cat
- 7 days claimed4
Not found in the sources yet: Drum or tray volume, Waste drawer, Noise, Without Wi-Fi, FCC ID, Made by (FCC grantee).
When it acts up
From the troubleshooting section of the manual, in plain words.
Light bar flashes blue
Why: The waste drawer is full.
What to do: Empty the drawer, press Reset, then press Cycle.5
Blue light with flashing yellow
Why: The scale has been triggered for more than 30 minutes.
What to do: Remove extra weight, put the unit on level hard floor away from walls, mats and cords, then press Reset.5
Red and blue lights alternate
Why: The curtain (laser) sensors are dirty.
What to do: Clean the three laser sensors.5
Sources
- Litter-Robot 4 Instruction Manual (Whisker), p. 5, 10, 12, 19, 21, 24, 28, 29, 35, checked Oct 8, 2026
- Litter-Robot 4 product page, specs, checked Oct 8, 2026
- Litter-Robot 4 Instruction Manual (Whisker), p. 21, checked Oct 8, 2026
- Litter-Robot 4 Instruction Manual (Whisker), waste drawer / litter level, checked Oct 8, 2026
- Litter-Robot 4: Light codes guide (official support), checked Oct 8, 2026