A Sigma dry couplant continuous test wheelprobe is more than an ultrasonic
transducer. The wheel probe is an ultrasonic inspection configuration
device in which a variety of transducers can be included, such that
inspections; axially, circumferentially, and for wall thickness can
be done simultaneously. The wheel probe has no absolute dimensions,
the diameter can be changed to accomodate various inspection requirements,
the body length can be changed to add more transducers, and the externals
of the axle can be easily adapted to most any manual or automatic scanner.
The SIGMA Wheelprobe is not an oil filled tire. The wheelprobe is a
precision instrument with two primary components: the stator (axle),
which contains the various transducers; and the rotor (wheel), which
rotates about the stator on precision bearings. The replaceable tire
which mounts on th wheel, provides ultrasonic coupling to the part being
inspected. Different tire materials are available, depending on surface
condition and the required tire wear.
To order please call SIGMA, or define the unit according
to the "PART NUMBER GUIDELINE" on page 20.
The following is an example of a typical part No.:
SDWC5-2(.25x.50)0L-FD.4-RA 10.0 describes
the following unit:
Sigma Dual Wheelprobe
For testing in Carbon steel material
Operating frequency 5 MHz
2 elements .25 in. Long by .50
in. wide
Refracted Exit Angle 0 degree Longitudinal
Focal Depth .40
inches
Radiused Axially 10.0
in. for pipeline O.D.
Some current applications of the wheel probe
Wall thickness Shuttle Booster Rocket
Multi-element (wall thickness, cw, ccw and side
looking) for tubular inspection
Two unit pair pitch/catch, radiused, for pipe content
inspection
Dual-Dual stretch for rectangular tubing
Hi-pressure (3000psi) compensated for gas pipeline
inspection.
