Low-concentration dust concentration detection device

The utility model belongs to the field of dust detection, and particularly relates to a low-concentration dust concentration detection device which comprises a base, the top of the base is fixedly connected with a supporting column and an electric cylinder seat, a gas collecting mechanism is arranged in the base, and a cover plate is fixedly installed at the top of the supporting column. The gas collecting mechanism comprises a fixing block, and the bottom of the cover plate is fixedly connected with the fixing block. According to the low-concentration dust concentration detection device, the movable block is controlled to move back and forth through the electric cylinder base, so that the movable block drives the arc-shaped block to move, the sliding plate slides in the sliding groove, and the appearance design of the arc-shaped block is matched, so that the gas collection plate can rotate by a large margin, gas collection work is completed, dust conveniently enters the powder passing groove, and the detecti