The Advanced MicroSystems, LLC. 1000 and 2000 series Distance Measuring Instruments provide fast, safe and accurate measurements from inside a moving vehicle. Capabilities include bi-directional counting, the pre distance function, count hold and display hold. The 1000 series also keeps track of elapsed time and speed, thus facilitating time-speed-delay studies. The EEPROM memory will retain the calibration number of 6 different vehicles for up to 100 years. The buttons are individually sealed switches that have a “click” feel as well as a tone feedback. No other DMI has a larger or brighter display for ease of viewing day or night, from any angle. Our DMI’s are still hand-built in Lemont Furnace Pennsylvania.