Sigma News Wheel Probes Travel 2000 Miles! Three Sigma Transducers, Inc Dry Coupled Rolling Probes have traveled nearly 2000 miles at 90RPM with a 1/16th helix 21î per rotation. Two of the probes contain longitudinal looking and circumferential looking 45degree shear transducers and the third probe is a dual focused wall thickness unit. Wall thickness inspection and flaw detection is being done quite efficiently on hundreds of miles gas pipeline. Sigma Transducers, Inc 6223 W. Deschutes Ave, Suite 416 Kennewick, WA 99336 USA (509) 727-3002

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