Use an oxygen dipping probe for oxygen measurements. Use a fiber optic light guide for flow calibration via DPTV.

The flush inlet tubing should be as short as possible, and should be submerged to avoid unwanted temperature changes from the ambient air in your system.

The flush outlet tubing should be as short as possible, but should end above the water surface.

Water must not escape via the flush outlet tubing, when the motor is running. If it does, extend the flush outlet tubing.

Water must escape via the flush outlet tubing, when the flush pump is running. If it does not, shorten the flush outlet tubing.

Alternative way of measuring oxygen consumption inside the swim tunnel chamber. The fixture locks a fiber optic cable in place, and the cable is connected to a Witrox 1 or Witrox 4. An oxygen sensor spot will be mounted on the inside of the chamber.

The swim tunnel chamber is submerged in a surrounding water bath to allow for precise water quality control.

The motor spins the propeller which creates a water current inside the swim chamber.

The motor spins the propeller inside the swim chamber. The spinning of the propeller creates a water current inside the chamber.