Ocean Instruments, Inc.

Ocean Instruments, Inc.

- Inboard Fixed for Continuous Underway Fish Egg Sampler



The Continuous Underway Fish Egg Sampler (CUFES) is a new instrument used to study the distribution of fish eggs from a moving ship. It consists of a hull mount with submersible pump, concentrator and sample collector. Water is pumped continuously from a fixed depth (surface to 3 m) to the concentrator on board ship. Eggs and similarly-sized particles are retained in the sample collector. CUFES operates continuously under all sea conditions.


Complete replacement pump-Chicago Pump Series 2950, Model 44091, VTX-P. RH rotation, Vertical Cast Iron Vortex Pump. Rated duty 170 gpm @ 20’ tdh, Rel.Pos. “RA”, Standard Construction, 213-215TC Frame, 5hp, 1150 rpm, 3 phase 230/460v TEFC motor. Impeller diameter 8”. Pump to be 3M Fuse Coated for use in salt water. Mounting parts, coupling and guard are included.

The semi-vortex submersible pump may be mounted inside the vessel with proper fittings installed on new or existing overboard pipe connections. The pump is Inboard placed in a sealed stainless steel box and connects to a sea chest. Water is drawn from 3 – 6 m below the waterline and then pumped to the Concentrator for processing.

A Nitex net oscillates at 6 Hz over a 2 cm range in a watertight aluminum box with a clear acrylic front panel. Flow in the 75 mm hose from the pump enters the box and net at the top. Eggs and other particles are concentrated in a 10 – 30 liter/min flow, leaving the box at its lower front. The filtrate is discharged through two 75 mm hoses at the side of the box. The Nitex net is stretched taut in a frame which moves laterally on three guide rods. A .33 hp, 110/220 VAC motor and reducing gearbox mounted behind the watertight box drives the net frame via a shaft, watertight penetration with double bearings and seal and eccentric drive gear.


A sliding plate directs flow in 19 mm Tygon tubing from the concentrator to one side of a knife-edge. Below, eggs and other particles are retained in a sample cup with a Nitex netting bottom. Flow is redirected manually by the user from one side to the other of the knife-edge, providing continuous collection of samples over user defined integration periods.

CUFES system. includes: inboard pump box with cover, pump, concentrator and sample collector, hoses and tubing (except *75 mm dia suction and discharge hose) and spares suite. Inboard

Pump, spare DVSU62, 3 hp 3 phase (specify voltage & Hz)

Motor, concentrator spare 110/220 VAC, 50/60 Hz

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