The NPL-302 Series is available in two models. The NPL-352 has two LCD displays and offers dual-axis compensation; the NPL-332 has a single display and single-axis compensation. Both total stations have an angular accuracy of 5" and use a Class 1 laser to measure points to ±(5+2 ppm x D) mm in precise mode. The NPL-302 Series can be used with reflector sheets or a standard prism. With a single prism, it can measure up to 16,400 ft (5 km). Two independent measurement keys allow surveyors to take measurements using both prism and reflectorless modes on the same job. Battery life ranges from 6.5 to 27 hours depending on the frequency of measurements. (TDS, Corvallis, Ore.)