There are two models of the Burris Gravity Meter, 1) Non-Calibrated Screw Burris Gravity Meter and 2) Calibrated Screw Burris Gravity Meter. Both meters are identical in construction and have the same reading resolution of 0.001 mGal when reading the force balance. The Non-Calibrated Screw Meter does not have a calibrated micrometer screw. The meter is intended for users with short range surveys on flat areas and/or stationary site measurements requirements. The Non-Calibrated Screw Meter’s measuring screw itself does not measure gravity.
