Dale S. Tollefson

Color sketch study of the final handle form. - TSI: Ultra Fine Particle Tracker This was a study for a second-shot neoprene design for approval by management.

Early Conceptual Sketch Form Studies - TSI: Ultra Fine Particle Tracker Part of a collection of early explorations in form. From which was narrowed down to the top 8. From which was narrowed down to the top 3.

Hot Wire Foam-cut Form Study - TSI: Ultra Fine Particle Tracker I hand sculpted this full sized, correctly weighted/ balanced mock-up, for review by right and left handed volunteers and upper management.

TSI Inc: Ultra Fine Particle Tracker - Final preproduction unit for Beta testing.

TSI: Personal Aerosol Monitor - Final Brochure

Early Conceptual Sketch Study - TSI: Personal Aerosol Monitor Developed form study sketch addresses several key requirements and limitations.

Pro-E detail dwg of unique Overlay Design - TSI: Personal Aerosol Monitor Overlay is a combination of standard domed tactile membrane switches plus selective surface poured vinyl layer.