Insite Instrumentation Group, Inc.
Water and Wastewater Quality Instrumentation
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Portable Dissolved Oxygen Sensor

The Portable Dissolved Oxygen sensor incorporates optical fluorescent technology, solid state electronics, and a unique side mount element. The InsiteIG PDO sensor is the only portable optical DO sensor that does not require expensive replacement caps. Nitric Oxide does not interfere with the InsiteIG portable sensor.

PDO Sensor

PDO Method of Operation

A very specific energy wavelength is transmitted to a ruthenium compound immobilized in a sol-gel matrix. The ruthenium will absorb this energy, changing the outer electron’s energy level. The electron will then collapse back to it’s original energy state, emitting the energy as a photon with a different specific wavelength. This is called fluorescing. If the intensity of the transmitted wavelength is tightly controlled, the amount of fluorescing is both predictable and repeatable. If oxygen molecules are present the amount of fluorescing is reduced, referred to as fluorescence quenching. By measuring the amount of quenching it is possible to determine the amount of oxygen present.

PDO with PortaCaddie

The InsiteIG PortaCaddie is an organizational tool, sold with each sensor, that captures the meter along with the sensor and cable. The PortaCaddie is designed to manage the cable to eliminate tangles while using the system in the field. The meter, sensor, and cable are retained securely during transport and are easily deployed at the desired test location. The rugged design was built specifically for the rigors encountered by field instrumentation. The PortaCaddie was designed to offer a level of protection to the meter, sensor, and cable.

See our InsiteIG Portable Meter (IPM)

PDO Sensor Portable Dissolved Oxygen Sensor (PDO)
  • Measuring Range: 0 to 25 ppm
  • Accuracy: 1% of the reading or .05 ppm, whichever is greater
  • Repeatability: 0.01 ppm
  • Response Time: 95% in under 60 seconds
  • Resolution: 0.01 ppm below 4.00, 0.1 ppm above 4.0
  • Drift: less than 1% per year
  • Temp. Range: 0°C to 60°C
  • 20ft sensor cable
  • Sensor connector