YSI releases optical DO Meter

By on October 18, 2009

The new YSI ProODO provides traditional YSI quality in a handheld dissolved oxygen instrument with luminescent optical dissolved oxygen technology.

The ProODO utilizes smart digital sensor technology which stores calibration data within the sensor. This allows probes to be placed on any ProODO instrument without re-calibration.

YSI ODO technology reduces the time required calibrating and maintaining sensors while utilizing a user replaceable sensing element that requires approximately an annual replacement. There are no electrodes to clean or solutions to change. Based on usage, calibrations can be stable for up to one year and are stored in each sensor.

Optical technology also increases DO accuracy and eliminates probe fouling by common gases such as hydrogen sulfide.

EPA Optical DO Approval Status

In January 2006, the US EPA recommended interim approval of ASTM International Standard Test Method D 888-05, which is a method for measuring dissolved oxygen using optical sensors when reporting results under the National Pollution Discharge Elimination System (NPDES) Program. While all EPA regions (1-10) have accepted the current “Recommendation for Interim Approval”, each EPA region still defines what end user documentation, and possibly test data, is required before the ATP method can be used.

At this point, there are two ATP methods for measuring dissolved oxygen with luminescent/optical dissolved oxygen sensors that have been submitted to the EPA; ASTM D 888-05 and Hach 10360. Both methods are in the queue to be entered into the Federal Register, which will make them official methods. This is currently estimated to take place before December 2010. Upon EPA approval, optical based technology for measuring dissolved oxygen will meet all regulatory requirements and will be usable, without restriction, for NPDES compliance-related data.

For more information on the YSI Optical ProODO Handheld meter, please call 888.426.2151 or email customercare@fondriest.com.

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