DurOx 325 DISSOLVED OXYGEN ELECTRODES
FEATURES:
- Temperature compensation
- Long working life - up to 6 months
- Protective hood standard
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Product Description
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The DurOx 325 dissolved oxygen electrodes are easy to use and maintain electrodes for taking dissolved oxygen measurements in the
field. The dissolved oxygen electrodes are temperature compensated and waterproof to the IP 68 standard or up to 2
bar. The dissolved oxygen electrodes have a long working life of up to six months from one electrolyte refill. An easy to
use calibration vessel is included with each dissolved oxygen electrode as well as a protective hood for field use. The
dissolved oxygen electrodes can be easily cleaned with warm water for many applications.What is Dissolved Oxygen? Some oxygen is dissolved in practically every liquid. For example, at a temperature of 68 °F (20 °C) and an atmospheric pressure of 1013 mbar saturated water contains about 9 mg/l oxygen. Ethanol can contain up to 40 mg/l whereas glycerol only has about 2 mg/l. Each liquid takes up oxygen until the partial pressure of oxygen in the liquid is in equilibrium with the air or gas phase in contact with it. The actual oxygen concentration depends on a number of factors, such as temperature, air pressure, oxygen consumption by microorganisms in a biodegradation process or oxygen production by algae, etc. The oxygen concentration is important for the:
Dissolved oxygen (DO) is the amount of oxygen (O2) dissolved in water. Dissolved oxygen measurements provide one of the best indicators of the health of a water ecosystem, as oxygen is a necessary element for all forms of life, including aquatic life. Oxygen enters water at the water surface through direct exchanges with the atmosphere. It is also produced as a byproduct of plant and phytoplankton photosynthesis. A decrease in dissolved oxygen levels is typically associated with an organic pollutant. Dissolved oxygen is used by plants and animals for respiration, and by aerobic bacteria in the process of decomposition. When organic matter (such as animal waste or improperly treated wastewater) enters a body of water, algae growth increases. As the plant material dies off and decomposes, dissolved oxygen levels decrease. If the water at the surface is not mixed with deeper water layers, the water's dissolved oxygen levels can become stratified. Dissolved oxygen levels can also vary according to the time of day, weather, and temperature. Dissolved oxygen in water can range from 0-18 parts per million (ppm), but most natural water systems require 5-6 ppm to support a diverse population. As dissolved oxygen levels drop below 5.0 mg/L, aquatic life is put under stress. As dissolved oxygen levels decrease, pollution-intolerant organisms are replaced by pollution-tolerant worms and fly larvae. If dissolved oxygen levels fall below 1-2 mg/L for a few hours, large fish kills can result. |
Specification
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Measuring Principle: Membrane covered galvanic sensor Temperature Compensation: IMT Measurement Range (68°F (20°C), 1013 hPa): 0 - 50 mg/L O2 Temperature Range: 32 to +104°F (0 to +40°C) Maximum Pressure: 14.5 psi (105 Pa (1 bar)) Immersion Depth: 1.6 inches min/19.7 ft max (4 cm min/6 m max) Operating Position: Any Approach Flow: 0.08 ft/s (2.5 cm/s) at 10% measeasurement accuracy 0.16 ft/s (5 cm/s) at 5% measeasurement accuracy Zero Signal: File File Reviews (0)
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