Ultrasonic Cat Deterrent Does It Work?

SonicBest Ultrasonic cat ScarerYou’ve got a cat problem and you want to know if an ultrasonic cat deterrent will work or not, or you want to know which is the best ultrasonic cat deterrent. Read on because here on StopUpest I’ve researched and reviewed many ultrasonic cat scarers and I’ll give you my results.

First up is a list of ultrasonic cat repellers one for the USA and one for the UK. They are in order of best first with a brief description. If you want more information there are links to reviews and more information.

USA list of Ultrasonic cat deterrent reviews

While this is the best ultrasonic pest deterrent it is near identical to the Yard Sentinal below but is has better results of cat free yards and reviews. Check it out on Amazon here.

Amazons best seller and very similar to the 1st place Pest Soldier Sentinel but knocked down a place by some reviews stating ill-fitting back plate leading to failure from water damage, but still a very good ultrasonic cat deterrent. Check it out on Amazon here.

This is also a great sonic cat scarer and best seller in the UK, but lacking some of the power supply features of the two above. Check it out on Amazon here.

DO NOT BUY! This made the list only to show you what a bad ultrasonic is. It’s cheap unreliable and has many bad reviews from other buyers. Check it out on Amazon here.

UK List of ultrasonic cat deterrent reviews

My recommendation for best UK ultrasonic cat repeller. This has most of the feature you would want in a maintenance free cat scarer, including solar charger and it is the cheapest sonic cat scarer. Check it out on Amazon here.


Amazons best-selling ultrasonic cat repeller knocked into 2nd place because of its price. It is very good at scaring cats away from your garden, I know because I bought one! Check it out on Amazon here.

A very competent cat deterrent and it is America’s best seller. Check it out on Amazon here.

Very easy to set up but unlike the repellers above that can target cats only the Mega-Sonic scares all animals. Check it out on Amazon here.

How does ultrasonic cat deterrent work

Hoont Ultrasonic Pest deterrentTo scare a cat the ultrasonic repeller first has to detect the cat, older models use motion detectors to spot anything that moves and blasts it with ultrasonic sound, and this unfortunately also included plants, leaves and trees causing the battery to run down very quickly.

Modern sonic cat scarers now use PIR (passive infrared) sensors, which detects the heat and movement of a cat giving fewer false alarms and it also works just as well at night.

Once the sensor is triggered the cat repeller emits a loud ultrasonic blast which either scares the cat or makes it uncomfortable for the cat to stay in your property.

Cats like to poo in tranquil private areas, you now have to train the cat which is a creature of habit to stop using your flowerbed as a litter tray. The ultrasonic blast is extremely irritating to cats and as mentioned above this is not how they like to do their business, but as creatures of habit they will keep coming back hoping for the good old times of peace and tranquillity. It may take them a while before they move to a new area to poo so have patience and perseverance.

Ultrasonic cat deterrents take time! Your cat repeller is not broken if there is no immediate results. If you see no results after a few weeks you mat have better results if you use both ultrasonic and scented repellers together.

What to look for when buying an ultrasonic cat deterrent

There are 3 main things to look at when buying an ultrasonic cat deterrent:

  1. The motion sensor
  2. The type of ultrasonic frequency
  3. How the unit is powered

Motion Sensor

There are 2 types of sensor; fixed or adjustable. If the area you want cat free is large with no pathways or driveways where passing traffic, pedestrians or even yourself can set off the motion sensor then a fixed senor is OK, however if you do have a smaller area you want covered then you should look for a model with an adjustable sensor.

Ultrasonic frequency

Different species are affected by a different range in the ultrasonic frequency, cats by one dogs by another and birds by yet another.

Ultrasonic cat repellers have two types of frequency settings. There is a non-adjustable unit and this will blast the cat with the full spectrum of ultrasonic sound, this will scare / annoy the cat and also all other animals / birds as well. If you want an animal free yard then this is the route for you.

If you want to target just cats then you need to look for an ultrasonic cat deterrent that has an adjustable frequency setting.

How to power the ultrasonic cat repeller.

There are many ways to power a sonic cat scarer:

  • Mains power
  • Battery power
  • Solar power
  • Car cigarette lighter
  • DC power

It all comes down to you and your situation also where you are going to place your cat repeller. However I personally would go for a solar rechargeable, if there is enough sun the batteries should last about a year before you would need to recharge them fully, making it fairly maintenance free.

Best ultrasonic cat deterrent

USA best ultrasonic cat deterrent

6-in-1 Pest Soldier SentinelWhile looking for the best ultrasonic cat deterrent the 6-in-1 Pest Soldier Sentinel has stood out for having some of the best user reviews and positive results.

I believe it is a blatant copy of the best-selling Yard Sentinel but it is more reliable and cheaper. Check out my full review here or find latest price and more reviews on Amazon here.

UK best ultrasonic cat deterrent

Selections GFA805 Ultrasonic Cat scarerThe Selections GFA805 Ultrasonic Cat Repeller first came to my notice as the cheapest ultrasonic cat repeller, fully laden with all the best features I though this is too good to be true! It must be cheap and nasty, where is the cost cutting to be found?

Apart from the supplied rechargeable batteries I found no cost cutting and the user reviews were glowing and positive.

Note: Amazons best-selling PestBye Cat Repeller has reduced its price to match the Selections GFA805 but it still lacks a solar battery recharger.

Conclusion Ultrasonic cat deterrents

Best Ultrasonic cat ScarerUltrasonic cat deterrents do work! They are not 100% effective but in most cases they will keep cats out of your garden.

They are not expensive and are easy to use and can be maintenance free, just set and forget.

Ultrasonic blasts are a humane way to repel cats without harming them or your garden.

If you have tried free home-made or shop bought repellents that confuse their sense of smell but have not worked, then Ultrasonic cat deterrent should be your next choice of action.

I hope you have found this post from StopUpest.com useful. If you know anyone else that would like to keep cats out of their yard please share this post. Thank you.

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