Eldex® manufactures instruments for analytical chemistry laboratories and chemical process control.  Our instruments are used in a variety of applications ranging from capillary HPLC to reactant feed.

New Optos Series Pumps now available.  Check models starting here

Eldex is well known for our line of precision high pressure metering pumps based on a positive displacement, reciprocating piston design.  Our ReciPro® line has models with flow rates from between 0.002 mL/min. to 144 mL/min. at pressures up to 6000 psi.  The versatility of the ReciPro pumps makes them suitable for a wide range of applications, including column washing and backflushing, post-column reaction, reactant feed and other process applications.

Our MicroPro® pumps, based on a high pressure syringe design, are especially well suited for fluid delivery in the microliter per minute range, with applications in nano, capillary, and micro HPLC and LC-MS, as well as a variety of low flow uses.

The Eldex product range also includes a versatile fraction collector.

Starting in 1984, Eldex designed and manufactured the PicoTag™ Workstation for Waters.  Now, we are able to offer an equivalent instrument called the Hydrolysis/Derivatization (H/D) WorkStation, as well as spare parts, accessories, and service for the PicoTag WorkStation and Vacuum Station.  Click on spare parts for a list of common spare parts with Waters and Eldex part numbers.

In addition to our standard products, we manufacture a variety of specialized instruments and customize our standard products for other manufacturers.

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Eldex Laboratories, Inc.


(707) 224-8800

30 Executive Court

(800) 969-3533

Napa, CA  94558-6278


(707) 224-0688




©Eldex Laboratories, Inc.