1.General Introduction
Yokogawa DO70G dissolved oxygen sensor is a optical type which designed for use 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 uses a phase measurement method and realizing stable measurements over a long period of time, and features replaceable sensor cap& cable for easy maintenance. A temperature sensor is incorporated for compensation. The DO70AG sensor can be used in either the PB350G/PB360G floating ball holder or in the DOX8HS submersion type holder.
2.General Specifications
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Items
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Description
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Object of Measurement
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Concentration of oxygen dissolved in sewage and drainage (water)
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Principle of Measurement
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Optical (fluorescence) measurement method
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Measurement Range
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0 to 25 mg/L
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Temperature of Measurement water
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0 to 50℃
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Flow rate
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2 m/sec or less
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Pressure
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0 to 500kPa
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Resistance Temperature Detector (RTD)
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22k NTC
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Construction
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Sensor unit: Stainless steel (316L SS)
O-ring: Ethylene Propylene Rubber (EPDM)
Permeable membrane: Silicone resin
Cable shielding: Heat-resistant flexible PVC
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Sensor Cable
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3m, 5m, 10m, 15m, 20m
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Repeatability
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0.1 mg/L or 3% FS, whichever is greater
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Temperature Compensation Error
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Within ±3% FS for a ±5℃ change in the range of 0 to 40℃
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Response Time
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Within 120 sec. (90% response)(including sensor)
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3.Model Selection
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Main Code
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Suffix Codes
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Description
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DO70G
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Optical Dissolved Oxygen Sensor
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Insert length
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-120
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120mm
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Type
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-E
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Always -E
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Cable length
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-00N
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No cable
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-03E
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3m
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-05E
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5m
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-10E
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10m
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-05D
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Digital 5m
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-10D
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Digital 10m
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-15D
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Digital 15m
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-20D
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Digital 20m
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—
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-N
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Always -N
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Option
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/S3
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Submersion type holder(stainless steel)
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/PP
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Submersion type holder(polypropylene)
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/FPP
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Float holder
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/SCT
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(polypropylene)Stainless steel tag plate
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4.External Dimensions
