What are the different ranges and their definitions for the IntelliCAL™ LDO101 Luminescent/Optical Dissolved Oxygen (LDO) Probe?

Document ID

Document ID TE5815

Published Date

Published Date 25/01/2018
Question
What are the different ranges and their definitions for the IntelliCAL™ LDO101 Luminescent/Optical Dissolved Oxygen (LDO) Probe?
Summary
Ranges for the LDO probe.
Answer
The “Recommended measurement range” is from 1.0-20.0 mg/L O 2 . This can be achieved reproducibly by following procedures and maintenance outlined in the User Manual without any additional adjustments.

The “Measurement range” outlined in the User Manual can be achieved by adding the Zero calibration giving the 0.1-20 mg/L O 2. It’s recommended to include the Zero Calibration if samples are below 1.0 mg/L O 2 as it increases reproducibility below 1.0 and down to 0.1 mg/L O 2 . See also When is it recommended to perform a zero calibration on the IntelliCAL™ LDO101 Standard Luminescent/Optical Dissolved Oxygen probes?

The “Detection range” from the Data sheet is from 0.05-20 mg/L O 2 . The detection range is developed from reproducibility using the additional techniques outlined in Are there any special guidelines for measuring low level dissolved Oxygen (DO) (below 1 mg/L O2) with the IntelliCAL™ LDO101 Luminescent/Optical Dissolved Oxygen (LDO) Probe?

The “Instrument range” found in the catalog is 0.01-20 mg/L O 2 . This is defined by the lowest and highest value the instrument can display. So the probe can display results as low as 0.01 mg/L O 2 . Although it is possible to get reproducibility as low as 0.01 mg/L O 2  using the special guidelines for measuring low level DO, it is very difficult and requires a high level of skill and lab technique to achieve.