Sentinel ultrasonic bird | pigeon | cat | fox repeller

image of an open book with the letters FAQ above

The sentinel ultrasonic pest repeller – FAQ

We get asked many questions about the Sentinel ultrasonic bird | pigeon | cat | fox | badger repeller and I hope the answers shown below are helpful. The electronic deterrents work very well, but when dealing with nature, it’s not always possible to get the result you would ideally like. But a little planning where best to position the ultrasonic deterrent can make a huge difference in its effectiveness.

How does the Sentinel repeller work?

The repellers work by creating an environment that creatures want to move away from. It’s a subtle and gentle approach to pest control. The Sentinel repellers are not an invisible glass wall or futuristic ray gun. They simply deter animals and birds from settling in the area you want to protect.

What creatures will the Sentinel deter?

It is effective in repelling Badgers, Foxes, Cats, Dogs, Seagulls, Pigeons and garden birds. We’ve sold the ultrasonic deterrent to Salmon fisheries in Scotland for keeping wild Mink away. The frequency is adjustable which means it can be fine tuned for most animal. There are Sentinel repellers used in India for keeping nuisance Monkeys away from domestic properties. The list of pests is very extensive.

front panel of the four speaker Sentinel ultrasonic bird, pigeon and fox repeller
4 speaker ultrasonic deterrent

Frequently asked questions about the Sentinel ultrasonic repeller:

Q. Will the repeller stop birds flying over my car or garden?

No. Birds fly at high speed and by the time they hear the sound, they will be out of the zone. You can’t stop a bird from flying overhead or even landing in your garden, but you can deter it from hanging around once it lands.

Q. I don’t want my neighbour to see that I am using the device. Will the ultrasonic repeller work through a window from inside a house?

A. No. Sound will not travel through glass (or a wall, fence, hedge, roof etc).

Q. Does the sound travel through 360 degrees?

A. No. Ultrasonic sound is directional, very much like a torch beam. We sell two variations of the Sentinel ultrasonic repeller. One has a single speaker and the sound travels in only one direction. The other sentinel unit has a speaker pointing to the left, two pointing to the front and one pointing to the right. This give about 300 degrees of coverage.

Q. How much does it cost to run?

A. The power use is very low and the cost is approximately .08p per 24 hrs. Many customers plug the ultrasonic repeller into a timer which is set to operate either in daylight hours for repelling cats, dogs or after dark for nocturnal pests such as Badger and Fox.

Q. If I put the repeller in the garden, will it affect my pet dog, cat etc?

If your pets are outdoors and in the area where the repeller is located, then yes, they will be able to hear it. if your pet is inside the house, then no, it will not be affected.

Q. I have pigeons on the roof. Can I position the repeller inside the loft and point it upwards?

A. No. Sound will not travel through a solid barrier (wall, fence, hedge, roof etc)

Q. I don’t want Rooks, Pigeons or Starlings in the garden, but I do want Robins, Chaffinches, Blue Tits etc. Can I set the device for different species of bird?

A. No. Unfortunately a bird is a bird. You can’t select between the good, the bad and the ugly.

image showing the front panel of the single speaker Sentinel ultrasonic bird, pigeon and fox repeller
single speaker sentinel ultrasonic repeller

Q. I have birds / Pigeons in a tree. Can I place the device on the ground and point it vertically upwards?

A. No. When it rains, the speaker that is facing upwards will fill with water and prevent the sound getting out. Secondly, leaves on trees act as a filter and in summer the ultrasonic sound won’t be able to penetrate much beyond the first few branches.

Q. What is the best place to position the Sentinel repeller?

A. Importantly, the ultrasonic repeller has to be pointing at the area to want to protect. Any obstacles in the way will create a shadow (think of a torch beam). Often the mounting position is a compromise between what would be ideal and what is possible. The ultrasonic deterrent is mains powered and is supplied with 10 meters of low voltage cable that runs from the standard 13 amp UK plug to the repeller housing. If you want to protect your garden at ground level, ideally you would position the device a few feet off the ground pointing slightly downwards.

Q. How heavy is it?

A. The single speaker unit weight 700 grams. The larger 4 speaker unit weights 1000 grams.


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