Dissolved oxygen sensor
K6300-Innovative Maintenance-Free Dissolved Oxygen Electrode
The K6300 Dissolved Oxygen Electrode features an all-stainless steel housing, with an internal membrane cap that incorporates an innovative solidified gel electrolyte specifically developed for wastewater treatment applications.
Unlike traditional polarographic dissolved oxygen electrodes, the K6300 eliminates the need for electrolyte and membrane cap replacement, allowing 1–2 years of maintenance-free operation and significantly reducing customer maintenance costs.
| Measurement Range | 0 ~ 40 mg/L, 0 ~ 400% |
|---|---|
| Resolution | 0.01 mg/L |
| Measurement Accuracy | < ±0.3 mg/L |
| Zero Error | < 0.1 mg/L |
| Temperature Range | 0 ~ 80 °C |
| Pressure Resistance | 0 ~ 3 Bar |
| Temperature Compensation Type | NTC22 K |
| Electrode Output | > 50 nA (Response in air) |
| Response Time | < 10 s |
| Calibration Method | Zero Point and Full-Scale Calibration |
| Mounting Thread | PG13.5 |
| Housing Material | Stainless Steel |
| Insertion Depth | 120 mm |
| Cable Connection | S8M |
| Protection Class | IP68 |
Features Overview
- Solidified gel electrolyte for long-term maintenance-free operation.
- Specially designed steel mesh membrane resists bubble impact.
- Strong resistance to acid and alkali corrosion.
- All-stainless steel construction for durability and extended lifespan.
- IP68 waterproof rating ensures stable performance in harsh environments.
- PG13.5 thread allows direct installation in process systems.
Expansion Capability
- Customizable electrode insertion depth.
- Cable length can be extended up to 30 meters.
Typical Applications
- Municipal Wastewater
- Industrial Wastewater
- Aquaculture Systems
- Municipal Water Treatment
- Natural Water Bodies
- Water Treatment Equipment
K6500 High-Performance Fluorescent Dissolved Oxygen Electrode
The K6500 Dissolved Oxygen Electrode is a high-performance fluorescent dissolved oxygen sensor designed for precision and durability. It features an independently developed optical sensing membrane for accurate measurement and rapid response. The photoelectric micro-signal processing ensures stability and enables calibration-free operation for up to one year. With advanced compensation technologies and a high-order nonlinear fitting algorithm, the electrode adapts seamlessly to complex industrial environments. Its corrosion- and wear-resistant housing materials allow reliable performance even in high-salinity conditions.
| Measurement Range | 0 ~ 50 mg/L, 0 ~ 500% |
|---|---|
| Resolution | 0.01 mg/L |
| Measurement Accuracy | < ±0.2 mg/L |
| Zero Error | < 0.1 mg/L |
| Temperature Range | 0 ~ 50 °C |
| Pressure Resistance Range | 0 ~ 10 Bar |
| Salinity Compensation Range | 0 ~ 50 ppt |
| Response Time | < 30 s |
| Calibration Method | Zero-point calibration, Full-scale calibration |
| Mounting Thread | NPT 3/4 |
| Housing Material | Main body: POM; Membrane cap: ABS + PC |
| Length | 180 mm |
| Cable Connection | Integrated Direct Connection Type |
| Protection Class | IP68 |
| Power Supply Mode | 12–36 VDC |
| Communication Mode | MODBUS RTU Protocol (RS485) |
| Membrane Cap Lifespan | ≥ 2 years |
Features Overview
- Fluorescent technology enables maintenance-free operation.
- Ultra-long lifespan of the fluorescent membrane cap.
- Strong resistance to acids and alkalis.
- Durable POM main body ensures mechanical strength and long lifespan.
- IP68 waterproof rating suitable for submersible installations.
- Stable measurement in complex and variable environments.
Expansion Capability
- Cable length can be extended up to 100 meters.
Applications
- Domestic Sewage Treatment
- Industrial Wastewater Monitoring
- Aquaculture Systems
- Municipal Water Applications
- Surface Water Analysis
K6900 Dissolved Oxygen Electrode
The K6900 Dissolved Oxygen Electrode is engineered for precise oxygen measurement in high-temperature environments. Built with durable 316L stainless steel, it ensures maximum accuracy and hygiene, making it ideal for small-volume or limited-space containers. The electrode supports CIP, in-situ steam sterilization, and autoclave operations. Its ultra-smooth surface minimizes contamination, while the imported high-quality membrane cap maintains exceptional stability under high-temperature and high-pressure conditions.
| Measurement Range | 0 ~ 40 mg/L, 0 ~ 400% |
|---|---|
| Resolution | 0.01 mg/L |
| Measurement Accuracy | < ±0.3 mg/L |
| Zero Error | < 0.1 mg/L |
| Temperature Range | 0 ~ 130 °C |
| Pressure Resistance Range | 0 ~ 5 Bar |
| Temperature Compensation Type | NTC22K |
| Electrode Output | > 60 nA (in air response) |
| Response Time | < 60 s |
| Calibration Method | Zero-point calibration, Full-scale calibration |
| Mounting Thread | PG13.5 |
| Housing Material | 316L Stainless Steel |
| Insertion Depth | 120 mm |
| Cable Connection | VP4 |
| Protection Class | IP68 |
| Diameter | 12 mm |
Features Overview
- Can withstand steam sterilization at 120–130 °C.
- Imported high-quality membrane cap resistant to high temperature and pressure.
- Full 316L stainless steel construction — strong, durable, and hygienic.
- Extremely smooth surface finish prevents process contamination.
- Supports CIP, SIP, and autoclave sterilization.
- Stable and reliable performance in high-demand environments.
- Fermentation batches can exceed 40 cycles.
Expansion Capability
- Customizable electrode insertion depth.
- Various cable connection configurations available.
- Cable length can be extended up to 30 meters.
Applications
- Biological Fermentation
- Pharmaceutical and Chemical Industry
- Food and Beverage Industry
- Animal and Plant Cell Culture
- Bacterial Propagation Research
K-DO5000 Dissolved Oxygen Transmitter
The K-DO5000 Dissolved Oxygen Transmitter adopts a compact and intelligent design suitable for various conductivity electrodes with different cell constants. It integrates measurement, display, signal transmission, alarm, and communication functionalities into one unit. With a high-definition LCD screen and bilingual (Chinese/English) intelligent menu, it ensures easy operation and user-friendly experience. Designed to withstand harsh on-site environments, it provides reliable and precise measurement performance for continuous dissolved oxygen monitoring.
| Measurement Range | 0 ~ 20 mg/L |
|---|---|
| Resolution | 0.01 mg/L |
| Basic Error | ±1% |
| Temperature Compensation Range | -20 ~ 150 °C (Automatic/Manual) |
| Temperature Compensation Type | NTC10k / NTC22k / NTC2.252k / T100 / PT1000 |
| Stability | < 1% / 24h |
| Current Output | 4 ~ 20 mA (load resistance < 500 Ω); Accuracy ±0.2% |
| Protection Rating | IP67 |
| Relay Control Contacts | 2 groups (3A 250VAC / 3A 30VDC) |
| Mounting Hole Dimensions | 92 × 92 mm |
| Installation Method | Panel-mounted / Pipeline-mounted / Wall-mounted |
| Power Supply (Optional) | 220VAC ±10% or 24VDC |
| Instrument Dimensions | 113.5 × 118 × 136 mm |
| Screen Parameters | 2.8-inch HD monochrome display (320 × 240) |
| Operating Environment | Temperature: -10 ~ 60 °C; Humidity: ≤ 90% RH |
Features Overview
- High-definition large-screen display for easy data reading and operation.
- Software digital filtering with strong anti-interference capability.
- Multiple compensation technologies ensure accurate and reliable measurements.
- IP67 protection rating for 24/7 stable operation in harsh environments.
- Supports tag input and multiple parameter correction functions.
- Compact, modular design simplifies installation and maintenance.
Applications
- Thermal Power
- Chemical Industry
- Chemical Fertilizer Production
- Metallurgy
- Textile Dyeing & Printing
- Desulfurization & Denitrification
- Surface Treatment
- Environmental Protection
- Pharmaceutical Industry
- Biochemical Industry
- Food Industry
- Tap Water Supply