YSI environmental monitoring system

The invention discloses a YSI environmental monitoring system which comprises a probe determinator, wherein a first protection barrel is arranged outside the probe determinator, a hoisting rope is arranged on the first protection barrel, first fence channels are arranged at the middle section of the first protection barrel, and a spacing is generated between the bottom end of the probe determinator and the bottom of the first protection barrel. The YSI environmental monitoring system is characterized in that a second protection barrel is sleeved outside the first protection barrel, second fence channels which correspond to the first fence channels are arranged on the surface of the second protection barrel, the first fence channels and the second fence channels are arranged in a staggeredway, a floating block is arranged on the hoisting rope, and a sinking weight is arranged below the first protection barrel. The YSI environmental monitoring system can prevent floaters from shieldingthe probe determinator at