Subsurface Instruments An innovating force that engineers, manufactures and distributes high-frequency and magnetic locators, pipe and cable locators, leak detectors, leak correlators, borehole gradiometers, pipe inspection cameras, ground fault locators and specialty locators.

SSI’s most recent innovation, the AML or All Materials Locator, locates buried PVC pipes, PE Pipes, plastic or nearly any other subsurface object more efficiently than ever before. Using patent-protected technology developed by SSI, the AML detects buried PVC pipes and other objects that magnetic locators can’t find.

SSI features a vast line of professional underground and underwater locator products for every need including surveying, construction, ordnance removal, excavation, and exploration. Our customers from the petroleum, water, sewer, power, telecom, cable and gas industries rely on SSI’s reliability and dependability to make crucial measurements in the world’s most challenging conditions. SSI’s products are proudly made in the U.S.A. and offer an industry-leading warranty.

SubSurface Instruments Headquarters and Subsurface Locators Manufacturing Plant in De Pere, Wisconsin

Meet our Sales Team

Joe Weiland


Western US & International Regions

(AK, CA, HI, NV, OR, WA)

Scott Rauen

Sales General Manager

Midwest & Northeast US Regions 

(ID, IL, IN, IA, KY, MI, MN, MT, NE, ND, OH, SD, WI, WY)

Don Hager

Sales Manager

South US Region

(AL, AZ, AR, CO, KS, LA, MS, MO, NM, OK, TN, TX, UT)