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Laboratory autoclaves: how can solids, liquids and biological waste be sterilised effectively?

Essential in microbiology, cell culture, quality control and cleanrooms, the laboratory autoclave delivers reliable saturated-steam sterilisation of media, glassware, instruments and biological waste. At 121–134 °C under pressure, it inactivates bacteria, spores and viruses while preserving the integrity of compatible loads. Depending on your requirements, choose a benchtop, vertical, horizontal or pass-through model, with dedicated cycles for solids, liquids and porous loads, plus built-in traceability (printout, USB, 21 CFR Part 11).

Which sectors use autoclaves?

From research to industry, the autoclave safeguards processes and biosafety.
  • Life sciences: sterilisation of media, glassware and pipette tips; decontamination of microbiology and cell culture waste.
  • Food & beverage: microbiological QC, sterilisation of utensils, method validation to in-house standards.
  • Pharmaceutical/GMP: components, non-sterile textiles, sterility testing, 21 CFR Part 11 traceability.
  • Environment: neutralisation of contaminated samples and effluents prior to discharge.
  • Cosmetics & chemicals: wet depyrogenation of compatible equipment, synthesis glassware.
  • Animal facilities/BSL: cages, bedding, biological waste in leak-proof bags and sealed containers.

The different types of autoclaves available

Frequently asked questions about laboratory autoclaves

How do I choose the right autoclave for my lab?
Define your loads (solids, liquids, porous items), the usable volume, the required traceability, and any water/energy constraints. Favour pre-vacuum if you’re using wraps or packaged items.

Gravity or pre-vacuum: what’s the day-to-day difference?
Gravity is fine for simple solids and waste. Pre-vacuum removes air, penetrates porous loads better and improves the drying of wrapped instruments.

How to sterilise liquids without boil-over?
Use a liquids cycle (slow ramp up/down), fill to ?70%, loosen caps, place bottles in a secondary tray and allow a controlled cool-down.

Which materials are compatible with the autoclave?
Borosilicate glass, PP/PTFE and 316L stainless steel are suitable. Avoid PVC and solvents. Check the “autoclavable” pictogram and the manufacturer’s maximum recommended temperature.

What traceability options support audits?
On-board data logger, USB/Ethernet, printer, Audit Trail and 21 CFR Part 11 compliance. Plan for IQ/OQ/PQ and archiving of cycle reports and Bowie-Dick tests.

What maintenance and periodic tests should be planned?
Inspect the door gasket, calibrate probes/pressure, check the safety valve, perform Bowie-Dick tests, use biological/chemical indicators, and carry out statutory inspections of the pressure vessel.