Special Features:

Backing: center crystal-1/8 inch thick powdered tungsten and epoxy or eqivalent; end crystals-powdered lead and epoxy or equivalent; weight: 99 lb

Properties:

An item specifically designed to transmit supersonic frequency wave motion energy to another item under test, and to receive components of reflected energy, the characteristics of which when interpreted on an associated indicator, provides facilities for the determination of flaws or other irregularities of the item under test. Does not include the indicator. See also transducer, motional pickup and detector, metal flaw, electronic.