AquaSensors Optical DO Sensor

  • 0 to 20ppm measurement range
  • No membranes-only annual field replaceable caps
  • Plug & Play Suitable for telemetry, dataloggers & PLCs
  • ModBus output
Product Options


The AquaSensors Optical DO Sensor can be connected to any computer to view data, calibrate the sensor and customize measurements without the need for an additional electronics box.

The Optical Dissolved Oxygen Sensor can be connected directly to a PLC for seamless integration with any industrial control system.

An optional AV38 or AquaPro local display / controller is available to provide a versatile system for more conventional installations. This option offers single or dual sensor inputs. It provides an ideal solution for monitoring all dissolved oxygen levels throughout a wastewater treatment plant.

The optical dissolved oxygen sensor covers a measurement range of 0 to 20 ppm and features a plug and play design with digital interface. No membranes are required for the sensor, just a simple, once a year cap replacement.

There is no cross sensitivity to carbon dioxide, sulphide, sulphate, ammonia, chloride or hydrogen sulphide.

Manufactured by: Thermo Scientific
Model: AquaSensors Optical DO Sensor

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Municipal and industrial wastewater
- Aeration tanks
- Aerobic digesters
- Plant effluent monitoring (NPDES permit holders)
- Anaerobic digesters
Many applications also exist in chemical process, food and dairy, pulp and paper, and other process industries


Range 0 to 20 ppm, 0 to 200% saturation
Resolution Below 10 ppm; 0.01 ppm, 0.1% sat
Above 10 ppm; 0.1 ppm, 0.1% sat
Accuracy ±0.1 ppm up to 8 ppm
±0.2 ppm from 8 to 20 ppm
Step response time 90% in 30 seconds (at 25°C) 95% in 37 seconds
Resolution PC000.01 (0 to 99.9 NTU), 0.1 (10 to 99.9), 1 (100 to 1000)
Temperature range 0°C to 50°C (32°F to 122°F)
Maximum pressure 300 psig @ 50°C
Maximum flow rate No flow required
Voltage range 8 to 36 VDC
IP Rating IP-67 with cap off, IP-68 with cap installed
Dimensions 203.2 mm x 47 mm
Warranty Yes
Power Long life - low power consumption - about 2500 hours with 4 alkaline AA batteries or about 10000 with lithium batteries
Waterproof rating IP67
Warranty Sensor: 3 years Sensor Cap: 2 years