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
Enormous amounts of excess nitrogen hit water bodies all over the globe, including the U.S., due to runoff from agricultural and other human activities. This nitrogen can cause dead zones and harmful algal growth. Before it reaches the ocean, microbes can process and remove some of it from stream sediments, connected aquifers and tidal freshwater zones. Thanks to this process, coasts can have a decreased likelihood of harmful algal blooms.
Keeping coastal waters clean is important for many reasons, including the fact that about 60% of the U.S. population lives on coasts. But despite the importance of these nitrogen processes, researchers have not fully investigated how they work.Read More
The Chesapeake Bay is the site of recurring seasonal dead zones: areas of low dissolved oxygen where aquatic life struggles to survive if it can at all. In 2020, a dead zone in the Maryland portion of the bay was one of the smallest since 1985, when record keeping began. The hypoxic area in the Virginia portion of the bay was smaller and briefer than many years previous.
But the problem isn’t gone yet, and looking forward, climate change will play a big role in determining the size and severity of dead zones throughout the bay. It could make it harder to get hypoxia under control in some places.Read More