Surf these sites: Beckman-Coulter -- pH meters and maintenenance supplies. EUTECH: pH METERS -- For the researcher. Integrated temperature probe. Electro-Chemical Devices, Inc. -- Manufacturer of analytical instrumentation for measurement and control of pH, Conductivity, Dissolved Oxygen, Resistivity, Specific ions, ORP Greenspan Technology Pty Ltd -- manufactures innovative and high quality dissolved oxygen sensors Hanna Instruments Ltd. -- pH Meters IQ Scientific Instruments -- State-of-the-art non-glass pH systems with ISFET silicon-chip sensor technology. A full line of non-glass pH meter and probe are displayed. Illinois Instruments Oxygen Analyzers -- Illinois Instruments manufactures process oxygen analyzers, headspace analyzers, and permeation analyzers. Milwaukee pH EC TDS Conductivity meters -- Milwaukee Meters offers best prices on pH, EC, TDS, conductivity, redox, thermometers, dissolved oxygen meters, 10% discount internet orders OMEGA Engineering, Inc. -- A very wide range of products for measureing pH ORION -- Portable pH, ISE /pH Meters Omnimark Instrument Corporation -- World''s toughest pH measurement system. No glass to break. SCIMEDIA -- A pH Meter uses a ISE and potentiometry to measure pH. Theory of pH meters. Strathkelvin Instruments -- Manufacturers of precision dissolved oxygen measurement instrumentation for laboratory use. Technika: pH Meters -- Technika sells the highest quality pH Meters. Some are as small as a pen. USA distributor for Strathkelvin disolved oxygen meters. -- Biotech Products presision disolved oxygen meters, six electrode sendors for Windows. pH Meters -- by Meters, made by Metrohm and Brinkman, buffer solutions
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