Automatic control survey balance

The utility model provides an automatic control survey balance, includes feeding device, control system and counter balance, feeding device includes box, lower box, the counter balance is placed the nowel internal, its characterized in that: it has feed hopper to go up the box, the feed hopper below faces the material dish of counter balance, control system includes supporting spring, electromagnetic shaker, laser control switch, battery case, switch, supporting spring connects feed hopper and electromagnetic shaker, the electromagnetic shaker is located inside the box, laser control switch aims at the balanced nut on the scale pan right side of counter balance. The utility model discloses a laser control switch automatic control device, it is originated that the control sample adds to the both ends of controlling the counter balance are balanced, and whether automatic judgement obtains the sample of required weight, separate the operator from the repeated uninteresting work and release, and are and the inter