Portable fixed-depth water sample collector

The utility model provides a portable fixed-depth water sample collector belonging to the technical field of water sample collecting device. The portable fixed-depth water sample collector consists of four parts: a control circuit, a water inlet control device, a power supply switch and a sampling bin, wherein the control circuit consists of a power supply (1) and a power wire (4); the water inlet control device consists of a sealing chamber (2), a water inlet pipe (8) connected with the opening on the top end of the sealing chamber (2) as well as an internal electromagnetic valve (6); the power supply switch controls the opening and closing of the electromagnetic valve (6); the water inlet pipe (8) is opened or closed with the opening or closing of the electromagnetic valve (6); the sampling bin (3) is internally provided with a sampling bottle (7); the water inlet pipe (8) and a sampling bottle cover as well as the sampling bottle cover and the bottle mouth of the sampling bottle (7) are all closely connected; and the graduation starting point of a cable wire (5) with the graduations is parallel and level to the top end of the sealing chamber (2). The water sample collecting device has the advantages of convenience, flexibility, simple operation and exact sampling depth, and improves the sampling precision and efficiency without transferring water sample or increasing the labor intensity of the monitoring personnel.