DO30G Dissolved Oxygen Sensor
The DO30G dissolved oxygen sensor is designed for water treatment applications including sewage treatment works, effluent activated sludge processes, and potable water treatment. It is also effective in river monitoring, intake protection, fish farming, and other water quality monitoring applications.
This galvanic cell sensor features fast response time and excellent long-term stability, with replaceable diaphragm and cable for easy maintenance. A built-in temperature sensor provides compensation. The DO30G sensor can be used with either floating ball or immersion fittings.
Key Features
- Fast response time
- Excellent long-term stability
- Easy membrane replacement
PB350G/PB360G Floating Ball
The floating ball holder for the DO30 features a design that minimizes fouling in the process. A brass ring around the sensor facilitates membrane integrity checks and helps eliminate algae deposits, making cleaning systems unnecessary. Maintenance is straightforward with only periodic inspection and calibration required.
Floating Ball Features
- Easy installation
- Simple calibration
- Sensor diagnosis for membrane integrity
FD30/PH8HG/DOX8HS Immersion Adapter
The immersion fitting is designed for installing the DO30G sensor in tanks, open vessels, and drains. Available in lengths from 0.5 to 2.0 meters, it also supports flange mounting. For applications with heavy solid loads, an optional "jet cleaner" is available to extend continuous measurement periods and simplify maintenance.
Immersion Adapter Features
- Various immersion depths
- Flange mounting capability
- Optional cleaning system
- Sensor diagnosis for membrane integrity
Technical Specifications
| Parameter |
DO30G |
| Object of Measurement |
Concentration of oxygen dissolved in solution (water) |
| Principle of Measurement |
Galvanic-cell method |
| Measurement Range |
0 to 20 ppm, 0 to 20 mg/L, or 0 to 100% (saturation)
The measurement range must be entered through the dissolved oxygen converter.
|
| Resistance Temperature Detector (RTD) |
Pt1000 |
| Construction |
Sensor unit: Rigid PVC, Stainless steel
O-ring: Nitrile rubber
Permeable membrane: Fluoro-resin [FEP]
Cable shielding: Heat-resistant flexible PVC
Outlet of cable: Polycarbonate resin |
| Sensor Cable |
Length: 3 m, 5 m, 10 m, 15 m, or 20 m (specified when ordering)
Crimping terminal configuration: Pin-type, M4/M3 Ring-type or Fork-type (specified when ordering) |
| Weight |
Approx. 0.3 kg + 0.12 × N kg
(N: cable length, e.g., for cable length of 5 m, approx. 0.9 kg) |
| Temperature of Solution Under Measurement (SUM) |
max. 0 to 40 °C |
| Flow rate of SUM |
No less than 20 cm/s
Recommended to prevent sensor from trapping bubbles that cause measurement errors
|
| Pressure of SUM |
Normally: 0 to 30 kPa
Maximum applicable: 100 kPa |
| Characteristics |
Repeatability: 0.1 mg/L or 3% FS, whichever is greater (including sensor)
Temperature Compensation Error: Within ±3% FS (including sensor for a ±5 °C change in the range of 0 to 40 °C)
Response Time: Within 2 minutes (90% response) (including sensor) |