LimsPulse
Physical testing

Turbidity meter

Measures how cloudy a liquid is by shining light through it and measuring the light scattered by tiny particles. Results are given in NTU or FNU and are used for clarity and opalescence tests.

  • Pharmaceutical
  • Biotech
  • Water treatment
  • Food & beverage
  • Brewing
  • Environmental testing
Illustration of Turbidity meter
CALIBRATION

Turbidity meter calibration procedures

Formazin standard calibration

Calibrates the turbidity meter with a series of formazin standards covering the working range, then verifies the calibration with an independent standard.

Open procedure
QUALIFICATION

Instrument qualification (DQ · IQ · OQ · PQ)

  1. 01

    DQ — Design qualification

    Defines range, resolution, light source (white light or 860 nm), ratio mode, sample types and data integrity needs.

  2. 02

    IQ — Installation qualification

    Confirms installation, serial number, firmware, cuvettes and standards, and the environment.

  3. 03

    OQ — Operational qualification

    Verifies accuracy at several levels with formazin or stabilised formazin standards, and checks stray light and repeatability.

  4. 04

    PQ — Performance qualification

    Shows consistent results in routine use through daily secondary standard checks and correct results for reference suspensions.

In LimsPulse · Calibration Management

Keep every Turbidity meter in control: usage logs, calibration and maintenance schedules, and automatic blocking of overdue instruments.

See how