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Ultrasonic or water jet cat scarer

Updated: October 2026

The cat crosses the same gap each morning, and you are choosing between a noise you cannot hear and a short splash from the hose. An ultrasonic or water jet cat scarer is that choice: one unit stays dry through winter, the other needs a tap and must come in before a frost. There is no single winner. Mole stakes and bird units are outside this page. The [main comparison](/hub/pest-control/animal-repeller) holds the amazon.co.uk table Products Compared scored on 19 October 2026 from listings and review counts, not from a garden trial. A qualifying purchase can earn a commission. Once the box is yours, charge, aim, and draining sit on the [setup page](/hub/pest-control/animal-repeller/sub/animal-repeller-how-to-set-up).

The cat crosses the same gap each morning, and you are choosing between a noise you cannot hear and a short splash from the hose.

Our top picks

PestBye PestBye Jet Spray cat scarer

Best overall

PestBye PestBye Jet Spray cat scarer
7.9/10about £49.99
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Famisym Famisym HSS-GH501 solar cat and fox scarer

Best value

Famisym Famisym HSS-GH501 solar cat and fox scarer
8.2/10about £25.33
View offer
PestBye PestBye ultrasonic cat repellent, set of 2

Rank 3

PestBye PestBye ultrasonic cat repellent, set of 2
8.6/10about £29.98
View offer
On this page
  1. 1.What each one actually does
  2. 2.Pick the jet when
  3. 3.Pick ultrasonic when
  4. 4.Pets, paths, and stock

What each one actually does

A water jet waits for motion, then releases a brief spray from a hose. PestBye's Jet Spray, ASIN B004YCUT4W, claims about 10 metres, 120 degrees and a burst of about five seconds. The saved scrape has it at £49.99, with 3.8 from 4,652 reviews. On 19 October 2026 the live amazon.co.uk page showed unavailable, so £49.99 is not a promise of stock today. An ultrasonic scarer has no hose. PestBye's battery pair, B00FXSU2WK, is £29.98 for two units and 3.7 from 22,905 reviews. Each unit takes four AA cells, not included, and claims about 10 metres with an adjustable frequency. The file includes fewer visits after a careful aim, and cats that ignored the sound after weeks. The RHS says some cats flee from ultrasound and some do not. The RSPCA lists a motion sprinkler as a method. They have not endorsed this jet.

Pick the jet when

Pick the jet when you have an outdoor tap, a hose to the bed or the pond edge, and somewhere dry to store the unit before frost. The splash is for the moment a cat crosses and you want a cue it is unlikely to miss. Primrose treats the hose and the frost care as the cost of that speed. Garden Tool Box says a weak joint or a long run can turn a five-second burst into a dribble. Reviews on B004YCUT4W mention leaks and spray aimed the wrong way. You will get wet if you walk through the arc, and so will a postman on that line. A 120-degree head across a shared alley is the wrong aim. If you have no tap, cannot drain the head, or need the unit out all winter, stop. The jet is the wrong tool.
PestBye PestBye Jet Spray cat scarer

Testsieger

PestBye PestBye Jet Spray cat scarer
7.9/10about £49.99
View offer

Pick ultrasonic when

Pick the ultrasonic pair when there is no outdoor tap, or when the unit must stay out in winter without a hose full of water. B00FXSU2WK needs four AA cells per unit and no plumbing. At £29.98 for two, it is the large-file dry option in this set. It will not splash the path, and it will not give the sudden cue a jet does. The RHS says some cats stay where cover is thick. Conservation Evidence's note on Nelson, Evans and Bradbury (2006) matches that caution: about 32 per cent fewer intrusions in one UK experiment, and no significant drop in a longer one. Habituation is in the reviews as well. Buyers describe cats that walked through after weeks. Branches in the beam flatten the batteries overnight, which is a siting fault. The listing calls the units waterproof and prints no IP code.

Pets, paths, and stock

Rabbits or guinea pigs in a hutch change the pick. On 19 October 2026 the brand's live description said ultrasonic units can affect rabbits or guinea pigs, which is why this model uses water. That is the seller's statement, not a study. If the hutch sits in the beam, do not buy the sounder and hope a lower frequency misses them. A jet still soaks whatever crosses, so keep the hutch outside the arc. Point either unit at the gap under the fence and walk it once at dusk. The jet is the pick when the hose and the frost plan are real. The ultrasonic pair is the pick when you need a dry winter unit. With no tap and rabbits in the beam, neither is a clean answer.

Common questions

Which can stay out all winter?
The ultrasonic pair can. It has no hose to freeze, though it still needs AA cells and a clear beam. The jet should come indoors before frost, drained. Primrose flags that as the cost of water. No date is printed here, so late autumn is the rule of thumb. Winter pushes this page toward B00FXSU2WK, unless rabbits in the beam rule the sound out.
I have rabbits in a hutch. Which type?
Prefer the jet, and keep the hutch outside the spray. On 19 October 2026 the live description for B004YCUT4W said ultrasonic units can affect rabbits or guinea pigs, which is why that model uses water. That is the seller's statement, not a study. Do not aim a sounder at the hutch and turn the frequency down as a fix. With no outdoor tap, neither of these two is a clean answer.
I have no outdoor tap. What is left?
The ultrasonic pair. B00FXSU2WK needs four AA cells per unit and no hose, at £29.98 for two in the scrape. A jet without pressure will not throw the burst. Mole spikes and bird units are outside this page. Habituation is the limit: the large review file includes cats that returned after weeks.
Do cats get used to the sound?
Often enough that you should plan for it. Reviews on the PestBye pair describe animals that ignored the units after weeks or months. The 2006 work summarised by Conservation Evidence did not find a lasting drop in every experiment. Changing mode, where the unit has one, is a seller suggestion, not a promise that a dominant cat will leave a bare bed.
Is the jet in stock at £49.99?
Not on the check of 19 October 2026. The live amazon.co.uk page for B004YCUT4W showed unavailable, while the scrape held £49.99 and 3.8 from 4,652 reviews. Look again before you order. The ultrasonic pair at £29.98 was a normal listing that day. Neither figure is a promise for the day you read this, and neither star rating is a lab score.

Related pages

Cat scarer buying guide

Best cat scarer UK

Animal repeller

Stop cats fouling garden UK: soil first, then a scarer

How to install a cat scarer: charge, aim and frost

Sources

Public UK sources used for this comparison. Shelf prices, stars and review counts are the amazon.co.uk figures captured for these 12 listings. Last checked 19 October 2026.

  1. RHS, cats (retrieved 19 October 2026)
  2. Conservation Evidence, ultrasonic cat deterrents (retrieved 19 October 2026)
  3. GOV.UK, foxes, moles and mink (retrieved 19 October 2026)
  4. RSPCA, cats in gardens (retrieved 19 October 2026)
  5. RSPCA, foxes in the garden (retrieved 19 October 2026)
  6. ASA, pest repellents (retrieved 19 October 2026)
  7. RHS, moles (retrieved 19 October 2026)
  8. nidirect, foxes (retrieved 19 October 2026)