D-Opto Optical Dissolved Oxygen Sensors
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D-OptoFully Self-Contained Optical Dissolved Oxygen Monitoring Logger

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The D-Opto Logger is a fully self-contained dissolved oxygen logger. It incorporates the dissolved oxygen sensor, temperature sensor, battery and low-power data logger in a rugged compact and easy to deploy underwater housing. The D-Opto Logger can operate for up to 3 months on a single user replaceable 9 volt battery, logging dissolved oxygen saturation (%), content (PPM) and temperature. The D-Opto Logger is supplied with D-OptoLog software for deployment setup, data offload and calibration.

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Simple to operate, the rugged low power D-OptoLogger optical dissolved oxygen and  temperature logger allows time-course data to be logged for more accurate assessment of oxygen dynamics, while enduring long field deployments between servicing.

  • Typical power endurance exceeds 30 days for all logging intervals (around 3 months at 15 minute logging interval)
  • Simple to operate 
  • Easy to deploy
  • Field replaceable 9-volt battery 
  • Simple software with data graphing function makes field servicing quick and straightforward
  • Logs dissolved oxygen saturation (%) content (PPM) and temperature
  • Compact, easy to deploy underwater housing
  • Supplied with D-OptoLog software for deployment set-up, data offload and calibration
  • The data is stored on-board in non-volatile memory
  • Data offloaded using simple Windows based software, supplied with the instrument
  • Logger can be set to stop logging when memory is full
The D-OptoLogger enabled Dr Young and his team to accurately and safely measure dissolved oxygen concentrations every 5 minutes at various sites along each river." – Dr Roger Young (Cawthron Institute New Zealand), following a survey of the health of 11 large rivers across New Zealand.

Accuracy

  • Dissolved Oxygen: 1% of measurement or 0.02ppm (whichever is greater)
  • Temperature: +/- 0.1 Deg C

Resolution

  • DO Saturation: 0.01%
  • DO Content: 0.001 PPM
  • Temperature: 0.01 Deg C

Memory 

  • Logger memory: Non-volatile, 10080 data records
  • Logged record: Time, date, DO% and DO PPM

Physical

  • Size: 48mm diameter x 200mm long
  • Depth rating: 30 metres
  • Bio-fouling control: Copper guard around sensor window

Power

  • Battery: 2 x 9 volt alkaline (PP9)
  • Battery endurance: Around 3 months at 15 minute logging interval, DO PPM, Temperature Deg C

Software

D-OptoLog supplied at no charge

  • D-Opto field proven optical technology
  • Measures temperature, dissolved oxygen saturation and dissolved oxygen content
  • Excellent long-term stability
  • Low power consumption
  • Simple calibration procedure
  • Copper anti-fouling ring around the optical window
  • Minimal servicing requirements
  • 30 meter depth rating
  • No consumables