Capture water samples from specific depths with this clever tool. The unit is made from impact-resistant PVC, with soft rubber seals that hold up to 1.5L of liquid. A unique design allows for hassle-free sample collection: when the desired depth is reached, students simply jerk the attached line to close the apparatus.

Includes a 20m line on Styrofoam winding float. Unit is 30cm long, 10cm in diameter and weighs 2 pounds.