Highly versatile laser receiver for leveling and aligning applications The Spectra Precision® HL450 Lasermeter is an easy-to-use tool that accurately measures elevations across the site, and is ideal for use with any rotating transmitter. The HL450 Laser Receiver features a digital readout of elevation that provides a numeric display of ± 40 mm or ±1.5 inches. The readout is displayed on the large front and rear LCD’s and shows exactly how far the elevation is from On-grade. Accurate measurements can be made without moving the rod clamp, saving time and more productivity. The HL450 has a 4 inch reception height, double the industry standard, which allows quick acquisition of the laser beam. Also, included is a patented anti-strobe sensor that prevents strope lights from setting off the receiver and makes it easier to identify the laser beam signal. The Laserometer is designed to survive the tough construction site conditions. It is totally waterproof and can withstand a drop up to 5 feet on concrete.