| GENERAL CHARACTERISTICS ITEM DESCRIPTION | SINGLE DIAL SYSTEM,RANGE VARIATION OF THE EARTHS GRAVITY FIELD 7000 MILLIGALS WITHOUT RESET,PRECISION READING MIN 0.01 MILLIGAL,TEMPERATURE THERMOSTATICALLY CONTROLLED,BATTERY HEATING ONLY,NICKEL-CADMIUM BATTERIES,12 VOLT AND 28 VOLT PER INSTRUMENT,PORTABLE SUITABLE FOR HAND-CARRY OR BACK-PACK,CARRYING CASE,WITH ONE BATTERY AND CHARGER |