TS-100 polarographic(Clark principle)dissolved oxygen sensor breaks down enzymes,drugs,and food.It is very sensitive to PPB and very resistant to high-temperature steam cleaning.Due to its 316L stainless steel shell and PTFE composite breathable membrane strengthened with steel mesh,it doesn’t change the membrane or electrolyte and can handle pollution,wear,and corrosion.
Platinum and silver anodes make an electrochemical current signal that fits the partial pressure of oxygen in water. Finding tiny amounts of oxygen between 0.1ug/L and 20mg/L lets it precisely manage dissolved oxygen in tough fermentation media and high-temperature cleaning media.
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Feature
Measurement principle
The measurement principle of TS-120 dissolved oxygen electrode is based on the polarographic method (Clark-type diaphragm sensor).
It consists of a cathode and an anode connected by a conductive electrolyte. When an appropriate polarization voltage is applied between the cathode and anode, oxygen (O₂) is reduced at the cathode, while a corresponding oxidation reaction occurs at the anode. These electrochemical reactions generate a current that is proportional to the partial pressure of oxygen in the measured solution.
The specific reactions are as follows:
- Cathode reaction: O₂ + 2H₂O + 4e⁻ → 4OH⁻
- Anode reaction: 4Ag + 4Cl⁻ → 4AgCl + 4e⁻
Parameters
| Category | Specifications |
|---|---|
| Measurement Principle | Polarographic method (Clark principle) |
| Measurement Range | 0.1ug/L (ppb) – 20mg/L (ppm) |
| Operating Conditions | Measurement Temperature: 0-80℃; Sterilization Temperature: 0-130℃; Pressure: 0.6Mpa |
| Response Time | <90s (95% reduction at 25℃); <40s (95% reduction at 35℃); <2min (98% response) |
| Stability | Drift <1% per month (constant temperature and pressure) |
| Polarization Voltage | 600-750mV |
| Electrode Signal | 30-65nA at 25℃ (customizable); ~60nA in air at 25℃ |
| Residual Current | <1% of ambient air current; <2% of full scale (room temperature in oxygen-free medium) |
| Temperature Compensation | PT1000, PT100, 2.252K, 22K (customizable) |
| Physical Parameters | Dimensions: Diameter 25mm; Insertion Depth: 70/150mm (customizable); Thread Interface: 1 1/4″; Cable Length: Standard 5m (max. customizable to 30m) |
| Material | Housing: 316L stainless steel; Membrane: Steel screen-reinforced PTFE + Polysiloxane composite membrane |
| Electrode Composition | Cathode: Platinum (Pt); Anode: Silver (Ag); Electrolyte: Potassium chloride alkaline solution |
Core Highlights
- Steam disinfection runs easily between 0 and 130 °C and requires few adjustments. This makes it ideal for frequent fermentation sterilization.
- Regular maintenance is all the membrane and fluid need. This speeds and lowers brewing costs.
- 316L stainless steel shell is corrosion-resistant and acid- and alkali-resistant. The steel mesh reinforced composite screen resists pollution, contaminants, and microbial adherence in the fermentation broth.
- Response time is sensitive and efficient: <40s at 35 ℃, <90s at 25. Fast feedback on dissolved oxygen concentration changes enables real-time fermentation process adjustment.
- Flexible installation customization: 1 1/4 “standard threaded interface, insertion depth, and cable length can be customized to meet fermentation tank specifications; temperature compensation types are compatible with most fermentation control systems.
Featured Applications
- Pharmaceutical fermentation: Keeping an eye on dissolved oxygen levels throughout the fermentation of antibiotics, vaccines, and other drugs to keep the environment under control and the quality and yield of the products high.
- Managing the dissolved oxygen content in real time improves the taste and quality of yogurt, beer, and bread fermentation.
- Enzyme fermentation: Keeping an eye on dissolved oxygen levels while enzymes are being made keeps their activity stable.
- Other fermentation situations include checking the amount of dissolved oxygen in water quality while biological fertilizer, feed, and other things are fermenting in complex fermentation media.
Daily maintenance and precautions
Maintenance points
- The interface seal is secured with 1 1/4 “thread to comply with fermentation tank installation regulations and prevent broth leakage.
- Waterproofing the electrode wire-electrode connection prevents water vapor from entering the fermentation environment and causing false signals.
- The metal wire layer and conductive black skin on the transparent center axis’ outer layer must be removed to strip the wire. Center connections should not be added to cables for signal transfer.
- Before usage, especially after cleaning at high temperatures, calibration must be done. To make sure the data is correct, the temperature, pressure, and stirring speed of the calibration environment must be the same as those of the fermentation measurement.
- To get a signal of a steady current, polarize the contact for 30 minutes before you measure. Don’t pull or bend the wires as you’re putting them in to make them live longer.
Safety precautions
- Regularly check the condition of the breathable membrane. If there is mechanical damage or serious contamination, replace the membrane cover and replenish the electrolyte in a timely manner.
- If there are visible dirt or attachments on the surface of the platinum cathode, gently polish it with 1200 # metallographic sandpaper, then rinse it with pure water and absorb the surface water droplets; When brown deposits appear on the silver anode, use 700 # metallographic sandpaper to polish until a shiny silver surface is exposed.
- When stored for a long time, after filling the electrolyte, an appropriate amount of distilled water should be added to the electrode cap to keep the membrane moist; If not in use for more than 6 months, rinse the electrode core and membrane sleeve, drain the electrolyte, and store.
- Avoid touching the surfaces of platinum cathode and silver anode with hands to prevent oil stains from affecting electrode characteristics; Before cleaning the electrodes, turn off the instrument power or disconnect the cable connection.
Electrode diagram illustration
- After opening the packaging, check for mechanical damage to the electrode cap and electrode body;
- Select the corresponding electrode sleeve or cable head for installation according to different electrodes;
- The connection between the electrode wire and the electrode is not waterproof, please make sure to do a good job of waterproofing.
Wire stripping instructions
Attention:
- The outer layer of the transparent central axis is covered with a conductive rubber layer and a metal mesh layer. When stripping, first peel off the metal mesh layer into the metal mesh as shown in the picture, and be sure to remove the conductive black skin of the transparent central axis;
- The cable extends to the host without any contact points except for a dedicated junction box.
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The TS-100 fermentation specific PPB grade dissolved oxygen electrode has become a benchmark product for dissolved oxygen monitoring in the fermentation industry due to its core advantages of high-temperature disinfection adaptation, precise micro measurement, corrosion resistance, and durability. Whether it is pharmaceutical, food, or enzyme fermentation, it can stably output accurate data in harsh fermentation environments, and has maintenance free design and flexible customization capabilities, greatly reducing operating costs and installation difficulties.
We provide professional technical support, including installation guidance and calibration suggestions. If you have any questions about product selection, customization, or use, please feel free to contact us at any time. Make TS-150 electrode your reliable partner for water quality monitoring!
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