LimsPulse
Thermal analysis & ovens

Muffle Furnace

An electrically heated, insulated chamber that reaches several hundred to over 1000 °C. In QC it is used to ignite samples for sulphated ash (residue on ignition) and to bring crucibles to constant mass.

  • Pharmaceutical
  • Food
  • Cement and ceramics
  • Mining
  • Environmental
Photo of a Muffle Furnace
Photo: Karelj, Public domain (cropped), via Wikimedia Commons
CALIBRATION

Muffle furnace calibration procedures

Temperature accuracy

Compares the furnace display with a calibrated reference thermocouple placed in the working zone at the set points used in testing.

Open procedure
QUALIFICATION

Instrument qualification (DQ · IQ · OQ · PQ)

  1. 01

    DQ — Design qualification

    Defines the maximum temperature, chamber size, controller features and safety cut-out needed.

  2. 02

    IQ — Installation qualification

    Confirms the model, power supply, ventilation and placement are correct and documented.

  3. 03

    OQ — Operational qualification

    Checks temperature accuracy at the set points used, controller functions and the safety cut-out.

  4. 04

    PQ — Performance qualification

    Shows the furnace performs consistently in routine use, for example by periodic temperature checks in the working zone.

In LimsPulse · Calibration Management

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

See how