Sampling device for on-line water quality analyzer

The utility model discloses a sampling device for an on-line water quality analyzer. A sampling chamber is arranged in the middle of the analyzer, a water fender is arranged on one side of the sampling chamber and forms an air-water separation chamber with box walls, the other side of the sampling chamber and the box walls form a water discharge chamber by being connected with a downflow weir of a base plate of a box body, an air vent is arranged on a cover plate of the box body, a discharge valve and a discharge pipe are arranged on two sides of the base plate of the box body on the downflow weir respectively, a sample injection hole is arranged on a lateral wall of the air-water separation chamber, a sampling hole and a liquid level switch are arranged on a rear wall of the sampling chamber, and the height position of the liquid level switch is between the sampling hole and the sample injection hole. The liquid level switch is a magnetic reed pipe liquid level switch. The sampling device for the on-line water quality analyzer has the advantages that the liquid level switch can be prevented from producing corrosion, water samples with impurities of sediments and the like are prevented from blocking or damaging analyzer pipelines, bubbles contained in the water samples are prevented from causing errors to volumes of analyzer samples, and accordingly, the accuracy of detected data is guaranteed.