Page 5 - Customer Needs and Use Assessments (CNUA) of pH Sensors

ACT In Situ pH Sensors Customer Needs and Use Assessment.............................................................................. 4
A. Application
1. Indicate the pH instrument technology that you use or anticipate using.
The original survey question allowed respondents to select only one response to this question. This led 11 of
11 respondents in the “Other (please specify)” category to voice this problem and to indicate in the comment
section that they used more than one technology. Revising the counts leads to the following corrected results:
Potentiometric, 45.0 % (27); ISFET, 31.7 % (19); Spectrometric, 20 % (12); and Not Known 3.3% (2). Corrected,
the “Other (please specify)” category now contains 0.0 % (0) responses. Note that the relative order in preference
for a given technology did not change as a result of this revision. At present, potentiometric technologies are
more common than ISFET, and these are followed by spectrometric technologies. Correcting this problem
revealed that more than a quarter of the users surveyed (26.2%) employ multiple units and use more than just
one technology.