Polarographic Dissolved Oxygen Sensors
Hamilton has been a leader in dissolved oxygen measurement for many years. The polarographic (amperometric) DO sensor product line includes the hygienic 12 mm sensor designs suited for applications in the bio-pharmaceutical, food, beverage and water treatment markets.
OxyFerm
The OxyFerm polarographic dissolved oxygen sensor is specifically suited for hygienic applications in the pharmaceutical industry. The OxFerm CIP is designed to withstand frequent CIP cleaning procedures.
OxyGold B
OxyGold B polarographic DO sensors provide a great general purpose oxygen sensor for applications with carbon dioxide and other entrained acidic gases.
OxyGold G
OxyGold G polarographic DO sensors can measure down to parts-per-billion trace oxygen levels.
Oxysens
Oxysens polarographic dissolved oxygen sensors offer a simple, economical solution for measurements in fish farms, water treatment, and algae ponds.
What makes Hamilton Polarographic sensors different?
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Simple to service
The plug-in cathode kit makes servicing the sensor quick and easy.
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Options
Hamilton offers specialized polarographic sensors suitable for trace oxygen measurement, high carbon dioxide environments, and sanitary applications.
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Approvals
Most Hamilton polarographic dissolved oxygen sensors have a variety of agency approvals making them suitable for multiple industries.
Specifications
| OxyFerm | OxyGold B | OxyGold G | Oxysens | |
|---|---|---|---|---|
| Measuring Range | 10 ppb - 40 ppm (DO) | 8 ppb - 40 ppm (DO) | 1 ppb - 40 ppm (DO) | 40 ppb - 40 ppm (DO) |
| Response Time t98% | < 60 s at 25 °C from air to nitrogen |
< 60 s at 25 °C from air to nitrogen |
< 60 s at 25 °C from air to nitrogen |
< 60 s at 25 °C from air to nitrogen |
| Pressure Range | 0 – 4 bar | 0 – 12 bar | 0 – 12 bar | 0 – 4 bar |
| Hygienic Aspects | Autoclavable, CIP, SIP | CIP | Autoclavable, CIP, SIP | -- |
| Electrolyte | Oxylyte | Oxylyte B | Oxylyte G | Oxylyte |
| Surface Quality | Ra < 0.4 µm (N5) | Ra < 0.4 µm (N5) | Ra < 0.4 µm (N5) | Ra < 0.8 µm (N6) |
| Current in Air | 40 - 80 nA | 180 - 500 nA | 180 - 500 nA | 40 - 80 nA |
| Material | Stainless Steel 1.4435 | Stainless Steel 1.4435 | Stainless Steel 1.4435 | Stainless Steel 1.4435 |
| Polarization Voltage | -670 mV | 0 mV | -670 mV | -670 mV |
| O-ring | EPDM | EPDM | EPDM | EPDM |
Resources
Hamilton's knowledge base provides a range of explanatory articles, frequently asked questions, and document downloads.
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Catalog - Process Analytics
Download the Process Analytics sensor catalog to learn about the complete offering of Hamilton process sensors and accessories. -
Guide - Dissolved Oxygen Measurement
This Hamilton guide provides the basic knowledge of dissolved oxygen measurement in a brief and understandable form. -
Brochure - BioPharma
Innovative solutions for process analytics in biotechnological and pharmaceutical industries.
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Does salinity impact my DO measurement?
Yes, salinity of a solution generally has an inverse relationship to the dissolved oxygen content within the solution. Arc sensors can have the salinity value of the liquid added in to correct the measurement by using ArcAir. -
Does temperature impact my oxygen measurement?
Yes, in a closed system, gas phase temperature is directly proportional to pressure and therefore measured oxygen content. In solution, temperature is inversely proportional to dissolved oxygen content. -
Does carbon dioxide sparging impact my DO measurement?
CO2 sparging will not impact the DO measurement using an optical DO sensor. CO2 can impact traditional polarographic DO sensors over time thus more frequent electrolyte replacement may be needed.
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Comparing Optical To Polarographic Dissolved Oxygen Measurement
There is a clear trend in the market towards replacing polarographic with optical dissolved oxygen. When evaluating the switch to optical, engineers must consider if there will be any impact on the current process due to the change in measurement principle. -
How to Measure Sensor A-length
Sensor A-length determines the insertion depth of the sensor. This article shows how this measurement is made for various styles of sensors. -
Understanding Wetted Materials (Stainless, Plastics, & Elastomers)
Wetted materials such as stainless steel, plastics, and elastomers are often listed by different names and abbreviations in different parts of the world. This quick cross reference guide helps sort out the common names for wetted materials used in Hamilton sensors.
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