The new Topcon DL-500 is said to implement the world's first Wave-and-Read technology.
"This feature provides an additional survey style option that allows a rod person to wave the staff back and forth, instead of keeping the staff plumb," said Ian Stilgoe, geomatics business manager of Topcon Europe Positioning.
The staff reading becomes the minimum when it stands vertically. The DL-500 tracks the waved staff and automatically reads the least value.
"This innovative technology allows for error-free readings, while eliminating eyestrain," said Stilgoe.
The DL-500 also incorporates the advanced Random-Bidirectional code (RAB code) for the staff and optimum digital processing algorithm for staff reading.
"These technologies give the DL-500 an ability to provide exceptional measurement accuracy, stability and speed under a variety of environmental conditions," said Stilgoe. "Even when the staff surface is partially shaded, or in dim lighting conditions as low as 20 lux, one single button triggers measurement and the DL-500 instantly records reliable results." The DL-500 automatically recognises the staff directions, either upright or inverted, "eliminating manual errors when surveying with normal and inverted readings."
Two models are available in different height measurement accuracy.