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EXO Optical Dissolved Oxygen

The principle of operation of the EXO optical dissolved oxygen sensor is based on the well-documented concept that dissolved oxygen quenches both the intensity and the lifetime of the luminescence associated with a carefully chosen chemical dye. The EXO DO sensor operates by shining a blue light of the proper wavelength on this luminescent dye which is immobilised in a matrix and formed into a disk. The blue light causes the immobilised dye to luminesce and the lifetime of this dye luminescence is measured via a photodiode in the probe. To increase the accuracy and stability of the technique, the dye is also irradiated with red light during part of the measurement cycle to act as a reference in the determination of the luminescence lifetime.

Like all EXO sensors it will remember its calibration, so it can be calibrated in the lab and installed in the field

Features:
- Reduced static sensitivity
- Improved accuracy above 200% air saturation (+/-5% vs. +/-15% of 6-Series)
- Faster Response (almost twice as fast) which is important for Profiling

Like all EXO sensors it will remember its calibration, so it can be calibrated in the lab and installed in the field

Dissolved Oxygen Specifications
Air Saturation Range: 0 to 500%
Saturation Accuracy: 0 to 200%: ±1% of reading or 1% saturation, w.i.g.; 200 to 500%: ±5% of reading 3
Saturation Response: T63<5 sec4
Saturation Resolution: 0.1% air saturation

ppm Range: 0 to 50 mg/L
ppm Accuracy:0 to 20 mg/L: ±0.1 mg/L or 1% of reading, w.i.g.; 20 to 50 mg/L: ±5% of reading 3
ppm Response: T63<5 sec4
ppm Resolution: 0.01 mg/L

Ordering Information:
599100-01 EXO Optical DO Sensor, Ti "EXO Optical DO Sensor, Ti
- Compatible with any EXO sonde
- User replaceable sensor cap (installed)
- Incorporates wet-mate

Video