With the MVR system the gravity meter beam is grounded, eliminating some electrical noise. The surface mount electronics and small size allow the card to be placed inside the meter's white box. It has very low power consumption, linear calibration and DC voltage output. If ordered in advance of construction, the range of the Model D meter may be 300 Milligals instead of the standard 200 milligals. This does not cause a reduction in meter sensitivity.
All components are the same.
The coarse or ranging micrometer screw of the Model D meter may be equipped with a gearbox, counter and nulling dial. There are several advantages to doing this. The resulting meter has all the advantages of both the Model D and Model G and more. The meter makes an excellent high precision geodetic meter. If there is a small amount of circular or periodic error in the coarse world wide range screw, this can be minimized by turning the coarse screw exact integral revolutions.