About Our Company Hayes Instrument Co., a Topcon dealer in Tennessee, is the leading supplier of top of the line surveying and construction instruments and supplies, has been serving the Surveying, Engineering, and Construction industry for over 40 years. Hayes is a factory authorized dealer for Topcon and Sokkia, as well as several top vendors of surveying supplies and accessories. In addition to our top of the line equipment and supplies, we have our complete factory-authorized Service Center. Hayes is among the fastest on turn around in the industry, and all work is guaranteed. Another aspect of Hayes Instrument is our Tech Support on all equipment. We dedicate ourselves to providing the best customer service and pride ourselves on serving our customers every day.