Questions fréquemment posées

Yes, a Cargo-Safe receiver is very much more sophisticated than a Cabin-Safe receiver and will perform very well with a Cabin-Safe transmitter.

Although a signal would be heard there is no display on a Cabin-Safe so the extent of the hole would be unable to be evaluated.

No, the output from a Cabin-Safe transmitter is very much smaller than a Cargo-Safe so no signal would penetrate any leaks and the OHV would be too small to base a reading on.

The principle of our Sonic Leak Detector is to pick up any sound with a frequency above that which we can hear, 15 KHz up to 200 KHz. This a wide range made possible by using a sophisticated microphone (most manufacturers only listen to the frequencies around 40 KHz).

Detection depends on the amount of leak, if it is a tiny slow leak of the type that might produce bubbles in water then that is very hard to detect because the slow speed of escape of the gas will not produce vortices and so no noise will be generated.

If the escaping gas is more rapid then it can be detected and then the next question is how loud is the background noise.

If it is loud then a pair of padded headphone are needed as opposed to the simple skeleton headphones provided as standard.

NB Because our Sonic Leak Detector has such a wide frequency range it makes a very good bat detector, picking up any species of bat because it does not need to be “tuned” to any particular frequency.

Although the Sonic Leak Detector comes with “hard-hat” type headphones but any set of headphones or earphones will do if they have a 3.5mm jack, mono or stereo. For noisy environments you can use DJ type headphones of the style that have large soft ear pads that fit completely over the ears and exclude any extraneous noise.

A brief answer is it depends on the amount of leak, if it is a tiny slow leak of the type that might produce bubbles in water then that is very hard to detect because the slow speed of escape of the gas will not produce vortices and so no noise will be generated.

If the escaping gas is more rapid then it can be detected and then the next question is how loud is the background noise.

If it is loud then a pair of padded headphone are needed as opposed to the simple skeleton headphones provided as standard.

The leather cases are not just for keeping the instruments clean and storm proof, they are to enable the units to withstand being dropped 2 metres, 6ft, without damaging the equipment.

The leather cases are made from English cow hides and use a process called “splitting”. This divides the hide in two which halves the thickness of the leather; the two halves are then coated with a vinyl plastic to make the resultant leather supple, very smooth and weatherproof. They also offer protection from dust, grease and debris.

The magnets are made from Neodymium which is the strongest magnetic material know. They are coated in nickel to prevent them from corroding.

Just about any liquid as all liquids conduct ultrasound. Gels are generally used because they stay where they are put. There are different types of couplant, water based which can be a problem on steel as unless cleaned off it tends to make the steel go rusty, oil based which is OK on steel but may stain plastics, and silicon based couplant for high temperature use say over 60 degrees C, 140 degrees F.

So in an emergency any liquid will do, a lot of people use spit.

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