Optical Dissolved Oxygen Sensor DO70G

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

Overview:

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.

Overview:

When used to measure the dissolved oxygen in an aeration tank, sensors tend to quickly become contaminated and need frequent cleaning.

Overview:

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. 

Industries:
Yes, the FLXA402 can directly power the Visiferm and DO70G. The modelcode selection for this is “D5”. It cannot be used as an analog sensor so MS code “D1” is not applicable for the Visiferm and the DO70G. D1 is available for ...
Yes, when selecting -D5(digital sensor(DO70G), FLXA402 can power an optical DO sensor.
When using analog DO sensor, e.g. DO30G, -D1 needs to be selected. When using optical DO sensor, e.g. DO70G, -D5 needs to be selected.

Downloads

Looking for more information on our people, technology and solutions?

Contact Us

Top