Were changes made to the BODTrak™II to improve precision and accuracy?

Document ID

Document ID TE3289

Published Date

Published Date 10/09/2019
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Question
Were changes made to the BODTrak™II to improve precision and accuracy?
Summary
BODTrak™II improvements
Answer
The BODTrak™II features faster, more consistent mixing than the BODTrak™. This results in an increase in the respiration rate and oxygen consumption of the microorganisms, which creates higher, more consistent, and more accurate values for Biochemical Oxygen Demand (BOD).

The BODTrak™II also has improved temperature control. The instrument is more able to resist a temperature change caused by heat produced by the stirring mechanism. When sample temperatures climb past 20° C, pressure increases in the bottle headspace. This increase in pressure results in a decrease in BOD. The improved temperature control of the BODTrak™ II prevents these low results.

Along with design improvements, the BODTrak™II also features expanded and improved procedures. The BODTrak™II “Hach Standard Method Procedure” is aligned with Standard Method 5210 D, Respirometric Method, which will result in higher and more accurate BOD values than the previous BODTrak™.

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