Hatfield Ultra-Density Larval System (HUDLS) construction

We are replicating the HUDLS system developed by Henry Fleener at OSU/Hatfield.

Here are a few photos of their system:

   
Hatfield Ultra-Density Larval System at OSU, overview HUDLS larval chambers with water lines
HUDLS header tank and dosing pumps HUDLS water distribution manifold

Henry was kind enough to give us a prototype to copy.

HUDLS prototype larval chamber

First step was to cut the 2” pipe that formed the center chamber at an extreme angle to create the interior “saber”. To get the cut on a table saw, we made a sled that pushed the pipe through at the right angle.

Table-saw sled for cutting the pipe saber at an angle

We then applied glue to the sabers

   
Applying solvent cement to the edge of a saber Tube of acrylic solvent cement

and pressed them against Nitex mesh screens

   
Nitex mesh stretched on a frame for gluing Saber pressed against Nitex mesh

and let them dry. We made 25 of 40 um and 75 um each.

Finished sabers drying

After drying, the sabers were then placed in seawater for 10 days to leach any plasticizers

Sabers soaking in seawater to leach plasticizers