Clausen Instrument Co Inc. Is a family owned and run business since 1974. We service, sell and repair construction and surveying instruments. We also offer a full line of supplies for the construction and surveying market. We carry paper products, paint, flagging, tapes, grade rods, tripods as well as other accessories for your needs.. Sale& repair of most instruments on the market. Old style transits to laser to Total Stations. Paint,Flagging,Paper,Grade Rods,Tripods,Tapes,Lasers,Levels,GPS,Robotic Total Stations and more.