The David White 3185 is a fully automated self levelling single grade laser.

Many other lasers in its price range do not offer self leveling control whilst in grade mode, or are a horizontal laser with an added manual over ride system.

Simply set up the 3185 on a tripod, aligned in the direction of the grade, and then dial in the desired percentage on the LCD display.
If you do not know the % grade to be dialled into the 3185, the following calculation example will provide this for you:

amount of fall DIVIDED BY length x 100.
(e.g. 1meter fall divided by 500meters x 100 = 0.2%)

Grade on the 3185 is 0.01% increments from 0 to 2.5%, and 0.05% increments from 2.5 to 15%

The David White 3185 grade laser is commonly used in New Zealand by civil and roading contractors, earthmovers, pipe and drainage crews and farm drainage contractors.

With a long operating range of 850 meters, the David White 3185 is suitable for even the largest civil contracting sites.

Once shipped from the manufacturer, Accurate Instruments' Calibration and Service Centres check and adjust all instruments on collimators and ranges, then fit them with the appropriate shockwatch, calibration sticker and issue a test calibration certificate.

Shockwatches a damage indicator that alert the user whether the instrument has been dropped.

The David White 3185 is checked, calibrated and certified by Accurate Instruments then fitted with a shockwatch.