ブランド名:
Yokogawa
モデル番号:
do71/do72
The Yokogawa SMART optical dissolved oxygen sensors DO71 and DO72 offer exceptional durability and stability with minimal maintenance requirements. These sensors feature fast response times, no warm-up period, and outstanding long-term stability - qualities that enable significant process and cost optimization.
The DO71/DO72 utilize a fluorescence phase-shift method that is less susceptible to contamination than intensity-based methods, delivering more accurate measurements over time.
Maintenance is simplified with tool-free sensor cap replacement at the tip. The electrolyte-free design enables continuous long-term operation without maintenance.
The DO71 and DO72-W (0-22.5 mg/L) are ideal for wastewater treatment and process control, while the DO72-T (0-2 mg/L) is designed for low concentration applications like SWAS. Multiple cleaning options make these sensors suitable for demanding applications requiring strict water quality control.
The 4-wire FLXA402 liquid analyzer can connect multiple sensor types (pH, conductivity, DO) to create customized measurement systems tailored to specific process requirements.
With a 90% response time under 90 seconds, these sensors quickly track oxygen concentration changes in dynamic processes.
| Parameter | Specification |
|---|---|
| Sensor type | Optical Dissolved oxygen sensor |
| Measuring range | 0 to 22.5 mg/L O₂ |
| Accuracy | ± 0.05 mg/L + 1% of reading |
| Repeatability | ± 0.05 mg/L + 0.5% of reading |
| Temperature accuracy | ≤ 1.0 °C |
| Operating temperature | 0 to 50 °C |
| Mechanical pressure | 0 to 3 Bar(g) (overpressure); 0 to 0.999 Barg (underpressure) |
| Response time t90 | ≤ 90 sec |
| Insertion lengths | 106 mm |
| Area classification | General purpose |
| Connection type | Permanent cable with 3, 5, 10 or 20m length |
| Parameter | Specification |
|---|---|
| Sensor type | Wide measuring range optical dissolved oxygen sensor |
| Measuring range | 0 - 22.5 mg/L O₂ |
| Accuracy | ± 0.05 mg/L + 1% of reading |
| Repeatability | ± 0.05 mg/L + 0.5% of reading |
| Temperature accuracy | ≤ 1.0 °C |
| Insertion lengths | 120 mm |
| Area classification | General purpose |
| Connection type | VariPin connector |
| Operating temperature | 0 °C to +50 °C |
| Pressure | 0-12 Barg (overpressure); 0-0.990 Barg (underpressure) |
| Response time t90 | ≤ 120 sec |
| Parameter | Specification |
|---|---|
| Sensor type | Trace measuring range optical dissolved oxygen sensor |
| Measuring range | 0 - 2 mg/L O₂ |
| Accuracy | ± 3 ppb + 3% of reading |
| Repeatability | ± 3 ppb + 3% of reading |
| Temperature accuracy | ≤ 1.0 °C |
| Insertion lengths | 120 mm |
| Area classification | General purpose |
| Connection type | VariPin connector |
| Operating temperature | 0 °C to +50 °C |
| Pressure | 0-12 Barg (overpressure); 0-0.990 Barg (underpressure) |
| Response time t90 | ≤ 120 sec |
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