55 Dissolved Oxygen
The YSI 55 dissolved oxygen meter measures dissolved oxygen in mg/L or percent saturation. It has push-button calibration with a built-in calibration chamber, direct salinity, and altitude compensation. The unit provides simultaneous readings of oxygen and temperature. The sensor has an acrylic body with a gold ring cathode embedded at the end. Inside the ring, there is a chamber containing a porous silver anode. The chamber is filled with a KCl electrolyte. A membrane which stretches over the chamber isolates the electrodes from the environment, but allows gas to enter. The membrane passes oxygen at a rate proportional to the pressure difference. As partial pressure changes so does the diffusion which changes the probe current proportionally. (Not recommended by vendor due to its age and older technology)
Availability: Commercially Available
| Manufacturer |
| YSI, Inc. |
| Product Name |
| 55 Dissolved Oxygen |
| Detection Category |
| Chemical |
| Detection Principle |
| Sensors; |
| Detection Method |
| Sensors |
| Application |
| Water Quality; |
| Equipment Type |
| Sensor |
| Product Synopsis |
| The YSI 55 dissolved oxygen meter measures dissolved oxygen in mg/L or percent saturation. It has push-button calibration with a built-in calibration chamber, direct salinity, and altitude compensation. The unit provides simultaneous readings of oxygen and temperature. The sensor has an acrylic body with a gold ring cathode embedded at the end. Inside the ring, there is a chamber containing a porous silver anode. The chamber is filled with a KCl electrolyte. A membrane which stretches over the chamber isolates the electrodes from the environment, but allows gas to enter. The membrane passes oxygen at a rate proportional to the pressure difference. As partial pressure changes so does the diffusion which changes the probe current proportionally. (Not recommended by vendor due to its age and older technology) |
| Availability |
| Commercially Available |
| Technology Readiness Level (TRL) |
| 9 |
| User Feedback Sources |
| Indifferent/No user feedback |
| Dimensions |
| 9.5 x 2.2 x 3.5 in (242 x 56 x 89 mm) |
| Weight |
| <5 lbs.; 1.7 lbs (.77 kg) |
| Power Requirements |
| AC/DC Line Power; Alkaline Battery; 9 VDC – 6 AA size alkaline batteries |
| Transportability |
| Pocket Size |
| Ruggedness |
| Waterproof/Resistant; Dust; IP65 |
| Operating Conditions |
| Medium: Fresh, Sea, or Polluted Water -5 to 45°C (operating temperature) -10 to 50°C (storage temperature) |
| Consumables |
| <$1,000/year; membrane, KCl solution, and sensor o-ring |
| Calibration Schedule |
| Yes |
| Unit Cost |
| $800.00 |
| Other Chemical Targets |
| Measures |
| Sample Introduction |
| Vapor/Gas |
| Sensitivity/Detection Limits |
| %; mg/L; ppm |
| Start Up Time (From Cold Start To Sample Ready) |
| 15 minutes |
| Response Time (Sample Application To Output) |
| Continuous (<30 seconds); <5 seconds |
| Training Required |
| <1 day training |
| Manuals Available |
| Yes |
| Warranties |
| 2 year instrument |
