Dry Heat Sterilizer

A Dry Heat Sterilizer is a device that uses high-temperature dry air to eliminate all forms of microbial life, including bacteria, viruses, fungi, and spores, without relying on moisture or steam. It’s commonly used in medical, dental, laboratory, pharmaceutical, and salon settings for sterilizing heat-resistant tools and equipment. Unlike steam-based autoclaves, dry heat sterilization works through conduction: heat is absorbed by the item’s outer surface and gradually penetrates inward, denaturing proteins and destroying microorganisms.

Dry Heat Sterilizer Video

How Does It Work?

The process relies on convection airflow to circulate hot, dry air evenly throughout the chamber. Items must be completely dry before placement, as any residual moisture can interfere with heat transfer and reduce effectiveness.

Higher temperatures shorten exposure time, but the exact settings depend on the load size, material, and validation requirements. The chamber is preheated, items are loaded on perforated trays for airflow, and the cycle runs until the core temperature of the items reaches the target.

What Can and Cannot Be Sterilized?

• Suitable Items:

  • Metal instruments (e.g., forceps, scalpels, needles, syringes).

  • Glassware (e.g., petri dishes, pipettes).

  • Powders, oils, and certain dressings.

  • Heat-resistant PPE like N95 masks (validated for reuse in studies).

• Unsuitable Items:

  • Plastics, rubber, or silicone components (melt at 200°C+).

  • Items with moisture (must be pre-dried).

  • Heat-sensitive materials like certain fabrics or electronics.

Always follow manufacturer guidelines and perform biological indicators to validate efficacy.

Exclusive Features of Dry Heat Sterilizer

• Compact cGMP model.

• Inner wall made from Stainless Steel 316 and outer wall made from Stainless Steel 304 materials.

• Inline high temperature HEPA filter. (temperature up to 400®C)

• Basic Structure made of M. S. Heavy angle.

• Two doors provided on both side one opening in Sterile Area (filling) and other opening in Non-Sterile Area (washing).

• PLC based online automatic operation with automatic & manual operations. (optional)

• Online printing facility available.

• ‘A’ grade mineral wool insulation to optimize heat effectiveness and stop heat loses.

• Dynamically balanced fan provided for hot air circulation to achieve uniform temperature.

• Complete electric panel board. Complete with pulley and damper connection

Process Operation of Dry Heat Sterilizer

The Ampoules / Vials placed in trays are washed in non-sterile room and loaded on the trolley. The trolley is moved to the sterilizer on a transfer trolley. Temperature and Times are set on the Digital Controller. The Impeller mounted on the top circulates the hot air horizontally over the charge. The air is heated by elements mounted on the top. Fresh air enters the system through Hepa Filter Module. The system incorporates two doors, one opening into the sterile room and the other opening in the non-sterile room. Both the doors are pneumatically interlocked. The temperature profile during sterilization cycle is recorded on a circular chart recorder, validation of the system is provided by a six-point digital temperature scanner. After the time period required for sterilizing the batch has elapsed, the heating circuit shuts of the pneumatics damper (exhaust) opens and cooling operation commences.

Technical Specification of Dry Heat Sterilizer

* Power voltage can be adjusted as per customer’s domestic power voltage requirements.
* Rights of technical improvements & modification reserved.
* Illustrations & dimensions are shown for information purpose only.