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
PREVENTIVE MAINTENANCE
Maintenance checklist
Each use
- Check the chamber for spilled residue
- Check the door seal and hinges
Monthly
- Clean the chamber floor once cool
- Check the exhaust vent is clear
Periodic (as per SOP)
- Temperature accuracy check with a calibrated thermocouple
- Check the over-temperature cut-out
Annual
- Inspect heating elements and insulation for cracks
- Electrical safety check
SAFETY
Safety precautions
Before you work on the Muffle furnace
- Wear heat-resistant gloves, a face shield and a lab coat when loading or unloading.
- Use long tongs and a heat-proof tile.
- Sulphuric acid fumes from sulphated ash are corrosive; char in a fume hood.
- Never leave a furnace running unattended overnight unless the SOP allows it.
In LimsPulse · Calibration Management
Keep every Muffle furnace in control: usage logs, calibration and maintenance schedules, and automatic blocking of overdue instruments.