YSI 6150 ROX Dissolved Oxygen Sensor
Features
- Utilizes luminescence lifetime detection of oxygen to provide the most stable measurements possible
- Microprocessor-controlled measurement system reduces drift and improves accuracy
- Easy to replace, durable membrane with a usable life of one year
| Image | Part# | Product Description | Price | Stock | Order | |
|---|---|---|---|---|---|---|
 | 606150 | 6150 ROX optical dissolved oxygen sensor with self-cleaning wiper | Request Quote | In Stock | ||
| Image | Part# | Product Description | Price | Stock | Order | |
|---|---|---|---|---|---|---|
 | 606144 | 6144 optical probe wiper pad kit, 20 pack of wiper pad strips | $50.00 | In Stock | ||
 | 606155 | 6155 optical DO membrane kit | $180.00 | In Stock | ||
 | 606625 | 6625 optical wiper kit, 2 pack, for use with YSI 6150, 6136, 6131, & 6132 optical probes | $60.00 | In Stock | ||
 | 600-01 | 600OMS V2 Sonde with temperature/conductivity sensor | Request Quote | Usually ships in 3-5 days | ||
The ROX optical sensor uses an integrated wiping system to provide anti-fouling in the most hostile environments. Durable mechanical features include a non-corroding titanium wiper shaft, replaceable wiper shaft seal, and a new switch controlled wiper parking system to prevent mis-parking.
The ROX sensing system is based on the luminescence lifetime method. This method was chosen because it offers the most stable, repeatable and sensitive method for oxygen detection, thus reducing sensor drift and prolonging deployment times.
YSI's optical DO membrane differs from the traditional electrochemical sensor membrane, requiring fewer steps for installation and less maintenance. ROX membranes will last for one year and are made of a durable material that is unlikely to be damaged in the field. The ROX sensor eliminates stirring dependency that was required of most traditional polarographic sensors.
- Range: 0 to 500%; 0 to 50 mg/L
- Resolution: 0.1%; 0.01 mg/L
- Accuracy (0 to 200%): +/-1% of reading or 1% air saturation, whichever is greater
- Accuracy (200 to 500%): +/-15% of reading
- Accuracy (0 to 20 mg/L): +/-0.1 mg/L or 1% of reading, whichever is greater
- Accuracy (20 to 50 mg/L): +/-15% of reading
- Warranty: 2 years
The 6150 ROX works with 6-series sondes (6600EDS, 600OMS, 6600, 6600V2, 6920V2, 6820, 6820V2, 6920)
The sensor outputs 0-500% saturation or 0-50 mg/L.
The sensor membrane should be replaced every year.
When you notice the black film flaking or start getting unstable readings, the membrane should be replaced. YSI recommends replacing the membrane yearly, but this recommendation also depends on usage. Replacement membranes can be purchased from Fondriest Environmental. (Part number: 606155)
The ROX sensor has zero flow dependence, a maintenance-free and puncture-proof membrane, and a zero cal option. It also is insensitive to H2S, has no electrolyte and can self-clean for longer deployments.
The Optical Sensor does not have an electrode to polarize therefore it does not have a warm-up time. The sensor can be turned on, calibrated, and used immediately after.
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A Virginia Institute of Marine Sciences study found that near-bottom fish in the Chesapeake Bay tend to move out of areas nearing hypoxia, according to a VIMS release. The study, which has spanned 10 years, found that biomass decreased in the middle of the Chesapeake Bay during mid-summer. That part of the bay typically experiences hypoxia due to algal blooms fed from nutrient runoff. A total of 48 sampling trips from 2002 through 2011 have shown that, when dissolved oxygen concentrations dip below 4 milligrams per liter, many near bottom fish leave the area. Analysis was limited to demersal, near bottom, fish and the same trends were not confirmed for fish higher in the water column.
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Charles River Algal Blooms Stop Swimming and Launch a Floating Wetland
The Charles River used to be a swimming hotspot for Cambridge and Boston residents. Decades of industrial pollution and nutrient runoff have degraded water quality and eliminated public swimming in the Lower Charles, but a movement is afoot to get Boston and Cambridge back in the water. One step toward the goal of a safely swimmable river—without the need to obtain a permit, as is now necessary—is detecting and managing the harmful algal blooms that appear on the river. An experimental floating wetland and new research and analysis of water quality data that shows a possible effective detection system for algal blooms on the Charles River are two new steps toward the goal of safe, accessible swimming.
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