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Quick change wedges for mechanized wedge mounts

SIGMA wedgemount transducers are similar in design and fabrication to a contact transducer, in that it is a single element unit that generates a shear or longitudinal wave into the part under inspection, by being mounted on an angled wedge, which is normally of a lesser velocity. These transducers will mount to any manufactured replaceable wedge, which includes threaded or standard screw mounts.

SIGMA wedgemount transducers are available in frequencies from 0.5MHZ to 15MHz, and have element diameters from 0.125 to 0.50 inches, have top mount miniture connectors, (Lemo or Microdot), other connector locations available by request. Wedgemount transducers with BNC connectors for standrd and snail wedges are available with rectangular elements to .75x1.0 inch and round elements with diameters to 1.0 inch

To order please call SIGMA, or define the unit according to the "PART NUMBER GUIDELINE"

The following is an example of a typical part No.:

SWMTL1-1/4-10.0 describes the following unit:

  • Sigma Wedgemount Miniature Threaded
  • Lemo 01 connector
  • element size 1/4 inch diameter
  • Operating frequency 10.0 MHz

  • Replaceable Wedges for all style wedgemount transducers are available from SIGMA in the following materials;

  • Lucite - by request only
  • Machined "Loten" - for surface temperatures to 350 degrees F, and radiation resistance greater than 108 RADS

Machined vespel - for surface temperatures to 450 degrees F, proportionately higher by observing an appropriate duty cycle, and radiation resistance greater than 108 RADS
Replaceable wedges are available for use in automated systems by addition of couplant feed tubes, machined grooves in the contact face, and appropriate mounting interface.

Each SIGMA Transducer is certified using the Sonix ProbeTEST™. A permanent record is maintained at SIGMA to verify comparison with probes manufactured at a later time. A copy of the certification is supplied to the customer at


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