Getting accurate pit depths and corrosion profiles can sometimes be a problem. Measuring on rounded surfaces or upside down could yield unreliable results. The digital pit depth gauge with bridge is designed for easy use, accuracy, and repeatability. Now available with a choice of bridging bars for different applications corrosion profiles can be plotted quickly and accurately by moving the probe and indicator along the bridging bar. Notched feet prevent the bridge from rocking on a rounded surface. The left-handed scale measures increasing depth as the tip drops into the pit. A locking adjustment screw allows instant calibration to a reference surface. Thumbscrews facilitate one-handed operation. The digital pit depth gauge with bridge with a 4" bridging bar is currently used heavily by oil, gas and water pipeline inspection companies to determine pipe integrity. Emt developed this pit gauge with engineers at a major oil and gas company. It is the foremost accurate tool for pipeline inspection. Ease of use and extreme accuracy make this a necessary tool for any pipeline inspection system.