Dry Heat Sterilizers

Dry heat sterilizers use controlled high temperatures without moisture to sterilize laboratory equipment, glassware, metal instruments, powders, and other heat-stable, moisture-sensitive materials. Operating at temperatures typically between 160°C and 180°C for extended periods (1-2 hours or longer), these devices achieve sterilization by denaturing proteins and oxidizing cellular components of microorganisms, including resistant bacterial spores. Unlike autoclaves, dry heat sterilizers do not rely on steam or pressure, making them ideal for materials that cannot tolerate moisture, such as oils, powders, sharp instruments, and glassware that must remain dry. They are commonly used to sterilize metal surgical instruments, glass Petri dishes, pipettes, glass vials, and laboratory tools that would corrode or degrade in moist heat environments. Dry heat sterilizers are available in various sizes, from compact benchtop ovens for small-batch processing to large walk-in chambers for industrial-scale sterilization. Modern systems feature programmable temperature controllers, uniform heat distribution via forced-air circulation, digital timers, temperature validation sensors, and cycle documentation for regulatory compliance. Many models include HEPA-filtered air intake to maintain clean conditions and reduce particulate contamination. These sterilizers are essential in microbiology, pharmaceutical manufacturing, medical device production, and research laboratories where moisture-free sterility is required. They are also used in depyrogenation processes to remove endotoxins from glassware and equipment used in pharmaceutical and biotech applications. Dry heat cycles are longer than autoclave cycles due to slower heat penetration, but they provide effective sterilization without the risk of rust, corrosion, or moisture damage. By sourcing pre-owned dry heat sterilizers from Wasteless Bio, laboratories access reliable, cost-effective sterilization technology while supporting sustainable equipment reuse. Each listing includes specifications such as chamber capacity, temperature range, heating method, cycle programmability, air circulation features, and compliance certifications. Dry heat sterilizers are indispensable for maintaining sterile conditions in moisture-sensitive applications.