How do the Pocket Pro and Pocket Pro+ TDS (total dissolved solids) testers determine TDS?

Document ID

Document ID TE2911

Version

Version 2.0

Status

Status Published

Published Date

Published Date 27/05/2017
Question
How do the Pocket Pro and Pocket Pro+ TDS (total dissolved solids) testers determine TDS?
Summary
Pocket Pro TDS determination
Answer
TDS results are derived from conductivity. The Pocket Pro and Pocket Pro+ TDS testers use a TDS factor of 0.71 by default. This factor can be adjusted and for best accuracy it should be determined by a USEPA gravimetric method such as Hach method 8163. Gravimetric methods determine true solids content by a combination of filtering, evaporation and weight.