Project Description

Industrial Online Dissolved Oxygen Sensor for Waste Water Treatment

The optical dissolved oxygen sensor measures dissolved oxygen using the principle of oxygen dynamic luminescence quenching technique. When blue light excites sensor film, the sensing film emits red light. The
phase difference between the blue excitation and returned red emission is measured, and the result is
used to calculate DO concentration.

Dissolved Oxygen Features

  • 0-20mg/L or 0-200% Saturation

  • 0~50 ℃;IP68 rating

  • Membraneless, no electrodes design

  • No oxygen consumption

  • Flow Independent

  • Automatic temperature compensation

  • No H2S Interference

  • Low Drift, fast response, and more accurate

  • Low Maintenance, low operating cost

  • Easy sensor cap replacement

  • RS-485; MODBUS protocol compatible

Technical Parameters

Range0-20mg/L or 0-200% Saturation
Response Time10 sec
Housing IP RatingIP68
Drift<1% per year
Working Temperature Range0 ~ 50℃
Temperature Accuracy± 0 . 2 ℃
InterfaceSupport RS-485, MODBUS protocols
Construction¾ inch NPT
Power RequirementsDC 6~12V +/-5%, current <50mA
Temperature Sensor TypeNTC
Sensor OD26mm
Sensor Length177.5 mm
Cable Length10m standard; 5m, 15m, and 30m optional
CalibrationsSupport one point and two-points calibrations
Sensor Cap Lifetime1 Year(at normal use)
Body materialsPOM and Stainless steel

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