LimsPulse
Titration & electrochemistry

Dissolved Oxygen Meter

Measures the amount of oxygen dissolved in a liquid using an electrochemical or optical (luminescence) sensor. Used for water systems, fermentation, nitrogen-purged formulations and environmental testing.

  • Pharmaceutical
  • Biotech
  • Environmental
  • Food & beverage
  • Aquaculture
  • Power generation
Photo of a Dissolved Oxygen Meter
Photo: Nuno Nogueira (Nmnogueira), CC BY-SA 2.5 (cropped), via Wikimedia Commons
CALIBRATION

DO meter calibration procedures

Air and zero calibration

Sets the DO sensor's 100% point in water-saturated air and its 0% point in oxygen-free solution, then checks the reading in air-saturated water against the solubility table.

Open procedure
QUALIFICATION

Instrument qualification (DQ · IQ · OQ · PQ)

  1. 01

    DQ — Design qualification

    Defines the requirements: range, resolution, sensor type, temperature and pressure compensation, and data storage.

  2. 02

    IQ — Installation qualification

    Records meter and probe identity, serial numbers, firmware and documentation.

  3. 03

    OQ — Operational qualification

    Verifies air and zero calibration, temperature accuracy and response time.

  4. 04

    PQ — Performance qualification

    Shows the meter reads air-saturated water correctly against the solubility table over routine use.

In LimsPulse · Calibration Management

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

See how