The term €ultrasonic€ means anything that is behind the range of sensation of any human being. When it is termed €Ultrasonic Ray€ it concerns about light. When it is termed as €Ultrasonic Sound€ it denotes a fixed range of sound frequency. The frequency of ultrasonic sound normally varies between 23 to 40 kHz. Human ears cannot hear ultrasonic sound because the frequency of the sound is too low to be audible.

It is said that the ants communicate between themselves through ultrasonic sound which is why it is inaudible to human ears. But most interestingly, the ultrasonic detectors are used in many purposes where there is a necessity to detect a minimal movement of an object within a defined area. Also, different Ultrasonic Detector Manufacturer is making its presence online so as to making shopping easy.

Ultrasonic Detectors are also used in different industries such as pharmaceutical, medical, house hold and personal care manufacturing. In mechanical industries these detectors are used for mechanical malfunction detection.

An ultrasonic detector acts following Doppler's effect. It receives two frequencies. One from the original source or loudspeaker and another from the moving object where the frequency gets reflected. When the two frequencies are mixed a third one is formed which is the difference between the two.

The manufacturers while making its presence online has assured with a varied range of product lines that can be used in varied industries. They also provide operation manual for easy work flow for a Lehman with newer application of technology.

Basically son-tector ultrasonic detector works to detect any kind of mechanical failures. The son-tector is used for the following purposes:

• Microphone Hand Probe: As the sensor moves close to the leak, the louder the sound becomes.


• Ultrasonic Noise Generator: Non-pressurized leaks don't make any noise. The device is placed inside the vessel to create ultrasonic noise.


• Contact Probe: In case of internal mechanical malfunction they are detected through contact probe.

The modes of propagation of a sound follow in wave motion normally longitudinal waves and shear waves.

• A longitudinal wave is identified with particle motion in the same direction as in the same direction of wave propagation.


• A shear or transverse wave is identified with particle motion perpendicular to the direction of wave propagation.

Sound waves can be converted from one form to another. While change of energy from one form into another transducers are used.

The types of ultrasonic transducers that are used in flaw detection mechanism are:

• Contact Transducers: These are used for direct contact with the test objects. They are used for locating pores and cracks.


• Angle beam Transducers: These are used in plastic body objects and as the name suggests they are placed in an angular fashion over the test object to detect the flaws.


• Delay Line Transducers: These transducers are used where there is a need of comparison between a normal object and a defective object. It is used in high temperature testing.


• Immersion Transducers:These are used in automated scanning applications and in those situations where a strong focus beam is needed.


• Dual Element Transducers: They are used in application that includes rough surfaces, coarse grained materials etc.

Thus drawing an inference from the above discussed topic it can be concluded that availability of ultrasonic detectors in the online market can bring revolution to the mechanical and manufacturing industries where these devices are used at large. Also, it would open a separate vertical of online market world.