Conductivity meter
Measures how well a solution conducts electricity, which tells you how many ions it contains. In pharma QC it is the main test for the ionic purity of purified water and water for injection.
- Pharmaceutical
- Biotech
- Power generation
- Semiconductor
- Water treatment
- Food & beverage
Conductivity meter calibration procedures
Cell constant
Determines the actual cell constant of the conductivity cell by measuring a certified potassium chloride standard of known conductivity.
Open procedureConductivity standard check
Measures one or more certified conductivity standards as samples to verify the meter and cell read correctly after calibration.
Open procedureInstrument qualification (DQ · IQ · OQ · PQ)
- 01
DQ — Design qualification
Defines range and resolution (0.1 µS/cm or better for pharma water), cell constant, temperature measurement, ability to show non-compensated values and data integrity needs.
- 02
IQ — Installation qualification
Records meter, cell and sensor details, firmware and installation (offline bench or online in the water loop).
- 03
OQ — Operational qualification
Checks cell constant with a certified standard, meter accuracy with precision resistors where required, and temperature sensor accuracy.
- 04
PQ — Performance qualification
Shows consistent performance in routine use, for example periodic standard checks and comparison of online and offline readings.
Keep every Conductivity meter in control: usage logs, calibration and maintenance schedules, and automatic blocking of overdue instruments.