Ultrasonic devices

Ultrasonic electronic pest and insect repellent devices claim that their high frequency sound waves are intolerable to rodents and insects.

Ultrasonic devices

Do Ultrasonic Cat Repellents Work? Ultrasonic Ultrasonic devices repellent devices are the middle ground protection for your garden, they are more effective than powder or gel granulesbut not as fully featured as water devices.

Gardeners like them because they are affordable, effective and completely safe.

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Some cat deterrents have multiple features, for example some water spray devices also have an ultrasonic feature build in, like the Guardener cat repeller. However what we are focusing on here are specifically ultrasonic devices, their features, advantages and exactly how they work.

Probably the first thing we should discuss is, do these gadgets actually work? Remembering that ultrasonic repellents are available for many different kinds of animal, this is a positive signal that they are valued by consumers. You can purchase ultrasonic repellents for dogs and insects, but interestingly not snakes.

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Here are some snake repellents if you are worried you cat may be takne by snakes! Anyway, back to cats; I know the first time I looked for a cat repellent it was to keep cats off my car at night, and the first thing I came across was cat powder.


I sprinkled some around the car, but because the car is parked on concrete, it soon blew away and it was a pointless exercise. In the garden the same is true, albeit to a lesser extent, wind and rain are going to limit the effect of cat powder.

So after that failure, the next thing I heard about was ultrasonic devices to keep cats out of the garden.

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I understood the theory, i. Firstly, the device has to trigger, so it is reliant on a good movement detector. Secondly would it really annoy cats to the point they stopped coming around and scratching my car, or leaving cat poo in the garden?

As the device I found was fairly inexpensive, I bought it, put in a 9v battery, set it up on top of a small wall pointing at my car and tested it. There was a small red LED on the front so whenever it was triggered, you could tell.

During testing, I could actually tell it was working because I would just hear the noise it was making, a high pitched tone, if I listened carefully.

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They say the tone is above human hearing, but I could hear it. Either the device was defective, or I had cat level hearing, who knows. Even more surprising to me, was that even after my ultrasonic cat repeller stopped working because water got into it, the cats still never came back, bonus!

Ultrasonic devices

So that was my experience, but has there been any independent testing on ultrasonic cat repellers?Molded Devices Inc. has developed an reputation as an industry leader in custom plastics and rubber processing solutions. Call us at for more details. Ultrasonic dental devices have been in use since the s and are important in the armamentarium of oral health care providers.1 Ultrasonic scaling is as effective as hand instrumentation for the removal of calculus and is widely used.

Ultrasound is defined by the American National Standards Institute as "sound at frequencies greater than 20 kHz". In air at atmospheric pressure, ultrasonic waves have wavelengths of cm or less..

Perception Humans.

Do Ultrasonic Electronic Pest Repellents Really Work? | Today's Homeowner

The upper frequency limit in humans (approximately 20 kHz) is due to limitations of the middle ear. Auditory sensation can occur if high‐intensity ultrasound is fed directly.

Ultrasonic electronic pest and insect repellent devices claim that their high frequency sound waves are intolerable to rodents and insects. However, simply plugging in one of these devices . Flow Measurement is the process of measuring fluid in your plant or industry.

You can measure flow through a variety of different devices such as Coriolis, differential pressure, vortex, magnetic, ultrasonic, turbine and positive displacement meters. Bolttech Mannings Mini-Max Ultrasonic Bolt Measurement and Monitoring System Mini-Max Specifications Physical Size.

Width ( in / mm) Height ( in / mm).

Do Ultrasonic Cat Repellents Work?