Dissolved Oxygen Meter Accuracy?
Dissolved Oxygen Meter Accuracy?
(OP)
We've got fairly new brand X on-line DO monitors at a wastewater treatment facility. We've got a new brand Y hand held DO monitor at the same plant. The two never read the same, off from 0.5 to 1.0 mg/l. You can calibrate both to a zero solution, but brand X has no other calibration. Our handheld, brand Y, can also calibrate at a known concentration, so I'm wondering if we may have a calibration issue?
Would you expect a hand held unit to read the same as an on-line monitor?
I'm trying to figure out how to test them both to determine which one is right.
Any thoughts or suggustions?
Mike
Would you expect a hand held unit to read the same as an on-line monitor?
I'm trying to figure out how to test them both to determine which one is right.
Any thoughts or suggustions?
Mike





RE: Dissolved Oxygen Meter Accuracy?
Steve
RE: Dissolved Oxygen Meter Accuracy?
Different manufacturers make use of various technologies in their meters. You can't expect different DO meter techologies to function the same because the meters may be affected differently by the environmental factors. Also, the meters are only accurate at best to +/- 0.3 mg/l.
Consult the application specialist with the meter manufacturer for best results.