Printer Friendly

Market profile: dissolved oxygen meters.

Since oxygen cannot efficiently dissolve in liquids, it appears in water only in low levels. Still, marine life and bacteria are sensitive to even slight fluctuations in concentration. When the amount of dissolved oxygen (DO) in water falls below 5 ppm, fish become stressed; below 2 ppm, they begin to suffocate and die. Photosynthesis and seepage from the atmosphere can, in most natural settings, replenish much of the oxygen consumed by aquatic animals and bacteria, but because oxygen volume varies depending on temperature, altitude and the presence of waste in water, among other factors, wastewater treatment plants, fish hatcheries and any other industry dedicated to monitoring water quality need to keep a dose eye on changing conditions.

Although titration "drop count" is adequate for conducting individual measurements of DO concentrations, the method is inadequate for users who need to run multiple and frequent tests. Dissolved oxygen meters, which are sold in both benchtop and handheld field variations, function much like electrochemical cells: as oxygen comes in contact with the instrument's sensor, a chemical reaction produces an electrical charge, which is then converted into milligrams of gas per liter of water, the equivalent of parts per million (ppm).

Within the worldwide electrochemistry market, DO meters make up approximately one-tenth of the total instrument demand. Ion selective and pH meters, both potentiometric techniques, constitute over half of the market and the number of traits shipped far surpasses the demand for other related products.

While some users opt for dedicated DO meters, many models combine dissolved oxygen capabilities with other electrochemistry measurements. For example, YSI, one of the largest DO meter vendors, offers the YSI 556 Multiprobe System, a handheld instrument that can simultaneously calculate dissolved oxygen, pH, conductivity, temperature and oxidation-reduction potential I (ORD). The YSI 550A, a more economical model that tests only for dissolved oxygen, costs less than half as much as the 556. Hach, a subsidiary of Danaher, sells, among its other DO meters, the HQ10 and HQ20, which feature an LDO probe. Unlike traditional sensors that use an anode, cathode and electrolyte to measure electrical current, the LDO records the effect of oxygen molecules on a luminescent surface to calculate oxygen content. Thermo Electron offers an array of dedicated and multisensor DO meters incorporating easy calibration technologies--a factor that can affect the accuracy of readings--into its instruments.

Last year, Nova Analytics made inroads into the DO meter market, I acquiring a controlling stake in WTW (see IBO 6/30/03) and purchasing the electrochemistry product line of Coming Life Sciences (see IBO 4/15/03).

While not the largest segment of the electrochemistry market, dissolved oxygen meters have nonetheless demonstrated faster growth than other technologies. IBO estimates the DO instrument market to grow at more than 5% a year, spurred in part by new environmental and pollution regulations.

Dissolved Oxygen Meters At A Glance:

Leading Suppliers * Danaher * Thermo Electron * YSI

Largest Markets * Academic * Agriculture and Food * Environmental * Government

Instrument Cost * $600 to $2,500
COPYRIGHT 2004 Strategic Directions International Inc. (SDI)
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2004 Gale, Cengage Learning. All rights reserved.

Article Details
Printer friendly Cite/link Email Feedback
Publication:Instrument Business Outlook
Geographic Code:1USA
Date:Jan 31, 2004
Previous Article:Photonics West 2004.
Next Article:The bottom line.

Related Articles
ProMinent-Knick alliance to distribute portable pH Meters.
Portable Oxygen Analyzer. (Supplier's Corner).
Electrochemistry techniques.
Hach Lange acquires Danfoss Analytical.
WEFTEC.05: water quality draws lots of attention.
Market profile: dissolved oxygen analyzers.
Nova analytics acquires Global Water Instrumentation.

Terms of use | Privacy policy | Copyright © 2021 Farlex, Inc. | Feedback | For webmasters |