Multi-sample in-situ pumping system: MIPS
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abstract
An apparatus developed at Texas A&M Department of Oceanography facilitates the in-situ filtration of up to 12 large-volume seawater samples. MIPS (multisample pumping system) is an enhancement of an earlier six-channel large-volume filtration system (Orr, Guinasso, and Schink, 1984). The system is enclosed in a 5-ft-diameter by 3-ft cylindrical frame deployable by itself or under a Niskin bottle rosette. Nominally, MIPS consists of a battery-powered Jacuzzi pump, a manifold containing 12 valves, three or six deep discharge 12-V batteries, a differential pressure sensor, a flow sensor, an underwater control unit, and a computer terminal as a deck unit. The inside of the frame is equipped with unistrut bars for mounting filtration cartridges or flat press-type filter holders. MIPS requires a single conductor hydrographic cable for deck control of the filtration process. The pump and pressure sensor are designed for a maximum pumping pressure of 50 psi. Pump speed is adjustable to maintain the desired system pressure throughout each operation of the pump.
