*The successor model, Optical Dissolved Oxygen Sensor DO71/DO72, cannot be connected to the Dissolved Oxygen Converter DO402G.
DO70G optical dissolved oxygen sensor is designed for using in water treatment plants such as sewage treatment works and effluent activated sludge process.
This optical sensor has a fast response time and good long term stability, and features replaceable sensor cap and cable for easy maintenance. A temperature sensor is incorporated for compensation. The DO70G sensor can be used in either the PB350G/PB360G floating ball holder or in the DOX8HS submersion type holder.
Details
- A Optical DO sensor that uses a phase measurement method and realizing stable measurements over a long period of time.
- Measuring range of 0 to 25 mg/l.
- A sensor cap that is easily replaceable by anyone.
| Dissolved Oxygen | 0 to 25 mg/l (ppm) |
| Liquid Temperature | 0 to 50℃ |
| Liquid Pressure | 0 to 500 kPa |
| Flow speed | 20 cm/s or more |
| Sensor for Temperature Compensation | 22k NTC |
| Cable Length | 3, 5, 10 m |
| Weight | Sensor; Approx. 0.1 kg Cable; 3 m; Approx. 0.4 kg / 5 m; Approx. 0.6 kg / 10 m; Approx. 1.1 kg |
| Repeatability | 0.1 mg/l or 3% FS, whichever is greater |
| Temperature Compensation Error | Within ±3% FS for a ±5℃ change in the range of 0 to 40℃ |
| Response Time | Within 120 sec. (90 % response) |
Resources
In a batch tank, analyzers such as dissolved oxygen (DO) analyzers, oxidation-reduction potential (ORP) meters, and mixed liquor suspended solid (MLSS) analyzers are used. To reduce the maintenance frequency, measures must be taken to prevent dirt accumulation on the sensor. As the liquid level in a tank can vary greatly, great care should be taken when selecting the sensor installation position in a tank.
Removal of free oil and grease from a wastewater stream reduces the potential for equipment problems to occur further downstream. There are three forms of oil encountered in wastewater treatment at a refinery.
When used to measure the dissolved oxygen in an aeration tank, sensors tend to quickly become contaminated and need frequent cleaning.
Downloads
Brochures
General Specifications
- *Discontinued: DO70G Sensor for Dissolved Oxygen Analyzer (713 KB)
- Sensor Holders (3.2 MB)
Drawings
- DOX8W Calibration Set (230 KB)
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