YSI 2003 Polarographic Dissolved Oxygen Sensor
- Dissolved oxygen sensor for the YSI Pro Series handheld meters
- Easily inserts into the probe module and cable assembly
- Compatible with YSI 5906, 5908, or 5909 screw-on cap membranes
|605203||2003 polarographic DO sensor with yellow 1.25 mil PE membrane kit, Pro Series|
|605306||5908 PE yellow 1.25 mil cap membrane kit, 550A, DO200, 559 & 2003 polarographic sensors|
The YSI 2003 is designed for use with the Pro20, Pro20i, Pro1020, Pro2030, and Pro Plus instruments; cables must be ordered separately. It can be used on 60520 (DO), 6052030 (DO/conductivity), 6051020 (DO/ISE), and 605790 Quatro (DO/conductivity/ISE/ISE) cables.
The YSI 2003 comes with six membrane caps and bottle of solution.
- 1-year warranty
- (1) YSI 2003 DO module
- (1) 5908 cap membrane kit
- (1) Instruction sheet
- (1) Hex wrench
- (1) Set screw
In a polarographic sensor, the cathode is gold and the anode is silver. The system is completed by a circuit in the instrument that applies a constant voltage of 0.8 volts to the probe, which polarizes the two electrodes. The sensor operates by detecting a change in this current caused by the variable pressure of oxygen while the potential is held constant at 0.8 V. The more oxygen passing through the membrane and being reduced at the cathode, the greater the signal increases.
Galvanic sensors continually consume the anode, even when the instrument is off. The consumption of the polarographic sensor stops when the instrument is turned off, giving it a longer sensor life.
Yes, the proven technology of the steady-state sensor is approved by the US EPA for compliance monitoring and reporting.
In The News
Officials at the Mississippi Department of Marine Resources say that a recent fish kill along the state’s Gulf coast is the largest they’ve seen, according to KVUE . The fish kill has brought dead crabs, eels and stingrays ashore.
Beachgoers were disturbed by the large-scale kill, but experts explained that conditions this year were to blame. With higher temperatures and low dissolved oxygen near the sea floor, creatures that live there were more likely to be affected.
The fish kill, beginning July 1, was the first of 2013 for the area. It was expected to last several more days, but lessen over that period.Read More
A few years after Ohio became a state in 1803, George Harner arrived in Greene County with a land deed signed by then-President Thomas Jefferson and Secretary of State James Madison. The homestead was largely old forest and wetlands and also included a fen-fed stream—the Beaver Creek.
As was the case with much of the Ohio Territory, the forests eventually gave way to land clearing and grain farming. Harner’s descendants, including his son John and John’s wife, Sarah Koogler, continued to work the rich soil for many years to follow.
Much of the original property and surrounding land has fallen prey to urban sprawl.Read More
Each fall in Puget Sound, coho salmon leave the salt water and swim up freshwater streams. They head upstream to spawn: lay their eggs and die.
Death is always the end of this journey for coho salmon, but in streams now running through urban areas, stormwater runoff kills them before they can spawn.
This phenomenon, called Urban Runoff Mortality Syndrome, can kill up to 70-90% of coho salmon in an affected area.
“‘Woah’ is a pretty common response,” said Kathy Peter, a research scientist formerly at University of Washington Tacoma and the Center for Urban Waters.
This phenomenon adds pressure to the Puget Sound population, already considered a species of concern by the United States Fish and Wildlife Service under the Endangered Species Act.Read More