Water-Proof Electronic Level Measurement Device is used in construction sites to measure heights, height differences and stake-outs. The Electronic Level Measurement Device is water and dust protected and provides measurement results in less than 3 seconds. Hi-Tech Instruments offers Water-Proof Electronic Level Measurement Device. Hi-Tech Instruments is the supplier of a wide range of products in the field of Surveying, Measuring, Monitoring, Mapping and GPS / GIS technologies. The Water-Proof Electronic Level Measurement Device computes height difference and reduced level on-board instantaneously and can work in dim street lights, indoors, tunnels and even in the dark with a flashlight.