Patent ID: 8302464

Claim:
An automatic sequential sampler for roof-top runoff of rainwater, comprising: a collecting part for collecting rainwater, with one end divided into a first pipe and a second pipe; a sensing part operatively connected to the first pipe; a first valve positioned at a certain position of the second pipe and electrically connected to the sensing part; a sampling part for sampling the rainwater, by receiving the rainwater flowing through a supply pipe with one end operatively connected to one end of the second pipe and the other end inserted into the sampling part; and a controlling part installed in the sampling part and electrically connected to the sensing part; wherein the second pipe further includes a bypass pipe being divided from a front end of the first valve and being toward the surface of land, wherein when the first valve is in an ON-state, the rainwater flows through the second pipe but when the first valve is in an OFF-state, the rainwater flowing through the collecting part is bypassed to flow into the surface of land by the bypass pipe; and wherein the sampling part includes a sampler comprising a support shaft, a support plate connected to one end of the support shaft, a number of holders formed, along with a circumference of the support plate, and a number of sample bottles respectively positioned at the holders, wherein one of the sample bottles is correspondingly positioned to be spaced apart, at a certain distance, from a lower end of the supply pipe of the sampling part.