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)

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Availability: Commercially Available

environmental@ysi.com
+1 937 767 7241
1700/1725 Brannum Lane
Yellow Springs, OH 45387
USA
www.ysi.com
Manufacturer
YSI, Inc.
Product Name
55 Dissolved Oxygen
Detection Category
Chemical
Detection Principle
Sensors;
Detection Method
Water Quality;
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
Dimensions
9.5 x 2.2 x 3.5 in (242 x 56 x 89 mm)
Weight
1.7 lbs (.77 kg)
Power Requirements
9 VDC – 6 AA size alkaline batteries
Transportability
Pocket Size
Durability
IP-65 (water resistant)
Operating Conditions
Medium: Fresh, Sea, or Polluted Water -5 to 45°C (operating temperature) -10 to 50°C (storage temperature)
Consumables
Batteries, membrane, KCl solution, and sensor o-ring
Calibration Schedule
Yes
Data Analysis Support Equipment
See MFR website or Product manual for list of accessories
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)
<5 seconds
Operator Skills Required
Technician
Manuals Available
Yes
Warranties
2 year instrument
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