USP 645 – easy and accurate conductivity calibration with an insacal master meter

The relationship between Insacal and Irish Power and Process appears to be mutually beneficial, combining Insacal’s expertise in conductivity calibration technology with IPP’s 30+ years of experience serving Irish industry in process instrumentation and calibration products8

An Insacal tank used for conductivity calibration

standard accuracy

Transmitter: Ut
Ambient temperature Uta
Cell constant determination Ucc0.5% Distribution: square
0.05% per C Distribution: square
0.4% when determined with
a standard solution.
1% Interval 1.3 to 99.9 S/cm
when determined by comparison
0.5% Interval 0.1 to 239ms/cm
when determined by comparison
Confidence interval: 2.
In short: )last significant digit +10%).
Confidence interval: 2
Total: ( etc etc etc……………….)
e.g.
Master displays 100,0uS/cm
Ambient temperature = 30C
Cell constant determined by a 100uS/cm standard solution (Ucc = 0.36%)
Coverage factor = 2 (level of confidence of approximately 95%)
Total uncertainty = 0.75%

Expert Product Support

Irish Power & Process (IPP), a part of the Brennan Group, and Insatech have jointly developed the Insacal Conductivity Calibrator3.


This collaboration has resulted in the creation of a master Conductivity standard that is accredited to 0.4% or better, designed to meet the stringent Water for Injection (WFI) quality requirements in the pharmaceutical and medical device industries.

IPP serves as a distributor for Insacal products in Ireland. This partnership allows IPP to offer high-accuracy calibration products to their customers in the pharmaceutical and medical device sectors, where precise conductivity measurements are critical.

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enhanced accuracy

The indicator/transmitter is calibrated using a high precision resistor prior to the loop-calibration. e.g. Master displays 100,0uS/cm Ambient temperature = 30C Cell constant determined by a 100uS/cm standard solution (Ucc = 0.36%) Coverage factor = 2 (level of confidence at approximately 9%%) Standard resistor acc = 0.05%. Distribution: square Calibration of standard resistor: 100ppm Confidence interval: 2. Temperature influence of standard resistor 15ppm Distribution: square Total uncertainty = 0.37%

Using the INSACAL to Calibrate Sanitary Conductivity Sensors

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