couplant

Records should be kept of each patient, noting the exposure levels, times, and couplant used.

This has enabled its use in gaseous environments without a liquid couplant.

It has an integral couplant supply if required.

One common couplant is propylene glycol, but there are many other options which can be substituted.

It also makes it convenient for situations where couplant handling would be impractical.

Effective in gases and liquids (i.e. requires no liquid couplant)

Includes couplant, transducer, 5mm steel test piece.

No couplant is needed.

Using the couplant increases the efficiency of the process by reducing the losses in the ultrasonic wave energy due to separation between the surfaces.

EMAT does not require the use of couplant.

Since no couplant is needed, the EMAT inspection can be performed in a dry environment.

Based on the transduction mechanism of EMAT, couplant is not required.

The transducer is typically separated from the test object by a couplant (such as oil) or by water, as in immersion testing.

Contact is usually assured by first removing visible corrosion scale and then applying petroleum jelly or another couplant before pressing the probe against metal.

Some ultrasonic coating thickness gauges require that a couplant in gel, paste or liquid format be used to eliminate gaps between the transducer and the test piece.

However, when ultrasonic testing is conducted with an Electromagnetic Acoustic Transducer (EMAT) the use of couplant is not required.

EMAT is an ultrasonic nondestructive testing (NDT) method which does not require contact or couplant, because the sound is directly generated within the material adjacent to the transducer.

This behavior changes for a Higgs mass greater than 168 GeV, beyond which this couplant increases with increasing energy scales and becomes singular prior to the ultraviolet pole of the Yukawa coupling.

After the complete assembly is clamped to the pipe the spring-loaded transducers are lowered so that they make contact to the pipe surface via a "DRY" greaseless interface or ultrasonic couplant as required.