From the "groma" with its right angles and plumb bobs used 3,000 years ago to modern-day grade rods, surveyors have been using some type of rod in their work. A new grading device claims to eliminate ...

Various grade rods can be emulated including direct elevation rods, cut/fill rods and indirect reading rods. Users can select measurement units in meters, decimal feet or fractional inches with the ...

The Trimble Spectra Precision DR400 DigiRod is a combination laser receiver with digital readout, laser distance meter and built-in tilt sensor to take rod-less, accurate grade readings.