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The Cole-Parmer Masterflex Speed Controller Model 07559-04 is a portable unit designed for use in biological laboratories. Specifically designed for HPLC pumps, this speed controller allows for precise control and adjustment of pump speeds for a variety of lab applications. As a product of Cole-Parmer, a reputable brand in the industry, this unit ensures quality and reliability in research settings where accurate pump control is essential.

When powered up, it did appear to do the normal pumping motions, though I did not test it with any tubing to confirm operational status. You get the exact unit(s) seen in the pictures.

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