10/13/2026
Ever wondered how students capture a water sample from 30 feet below the surface without mixing it with the surface water? Meet the Van Dorn Bottle! 🌊🧪
This spring-loaded sampling bottle is one of the coolest tools onboard our Schoolship programs. Here’s how you use it:
1️⃣ Preparation: Both end caps are secured open with a trigger mechanism.
2️⃣ Deployment: We lower the bottle down to a specific depth in the water column as water flows freely through the tube.
3️⃣ The Messenger: Once at target depth, students send a weighted metal "messenger" sliding down the line.
4️⃣ The Snap! The messenger strikes the release mechanism, and SNAP! Spring-loaded stoppers seal both ends, trapping an undisturbed sample from that exact layer.
Instead of using simplified plastic toys or standard lab demonstrations, our students handle professional gear used by working oceanographers, limnologists, and Great Lakes researchers. Using real scientific equipment builds genuine confidence, teaches rigorous field protocol, and lets students see themselves as real scientists. Water quality and temperature change dramatically across depth layers, and testing these samples brings those ecological concepts to life in real time.
Equipment like Van Dorn samplers, specialized nets, and water quality testing gear (along with the funding that keeps our Schoolships accessible to local schools) is made possible through generous donor support. Every contribution directly equips the next generation of Great Lakes stewards with real tools to study and protect our waters.
Thank you to everyone who supports hands-on science education on the water! ⛵✨
