Used Autoclaves & Sterilizers: Buying Guide for Clinics (2026)
Sterilization equipment is non-negotiable in any clinical setting — and autoclaves are the backbone of instrument processing in dental offices, outpatient clinics, veterinary practices, and ambulatory surgery centers. A new tabletop autoclave costs $3,000–$12,000; refurbished units from reputable brands like Tuttnauer, Midmark, and Pelton & Crane can deliver equal performance for $600–$3,500.
This guide walks through every sterilization method, the leading brands, what to inspect, and where to find the best deals.
Types of Sterilization Equipment
Steam Autoclaves (Gravity & Pre-Vacuum)
The gold standard for most clinical sterilization. Steam under pressure kills all microorganisms including spores.
Gravity displacement autoclaves: Steam fills the chamber, displacing cool air downward. Simpler, lower cost. Suitable for solid instruments, porous packs that don't require deep steam penetration.
Pre-vacuum (prevacuum) autoclaves: A vacuum cycle removes air before steam injection, ensuring complete steam penetration of porous loads (wrapped instrument sets, textile packs). Required for hollow-bore instruments.
- Use case: Dental, physician, podiatry, vet, outpatient surgery
- New price: $2,000–$30,000
- Used/refurbished: $500–$10,000
Dry Heat Sterilizers
Use high temperature (320–375°F) without moisture. Good for oil-based instruments, glass items, and materials that corrode in steam. Slower cycle times.
- Use case: Dental (burs, files), lab glassware
- New price: $800–$3,000
- Used/refurbished: $200–$1,200
Ethylene Oxide (EtO) Sterilizers
Low-temperature sterilization for heat-sensitive items (electronics, plastic tubing, complex surgical instruments). Longer cycle times (hours), requires aeration period. Regulated due to EtO toxicity.
- Use case: OR, medical device manufacturing, hospitals
- New price: $15,000–$80,000
- Used/refurbished: $3,000–$20,000
Hydrogen Peroxide Gas Plasma (Sterrad)
Advanced Sterrad systems from ASP (J&J) provide low-temperature sterilization without toxic residues. Fast cycles (45–75 minutes). Industry standard for heat-sensitive surgical instruments.
- Use case: OR, endoscopy, complex scopes
- New price: $60,000–$120,000
- Used/refurbished: $8,000–$25,000
Chemical / Liquid Sterilization
Glutaraldehyde (Cidex) and OPA (Cidex OPA) systems for heat-sensitive endoscopes. Not covered in detail here — these are consumable-based systems.
Top Brands: Tabletop Autoclaves
Tuttnauer
The industry standard for dental and physician office autoclaves. Excellent parts availability, robust service network, and decades of reliability.
Popular models:
| Model | Type | Chamber Size | New Price | Used Range |
|---|---|---|---|---|
| 2540M | Manual gravity | 9.5L | $2,800 | $500–$1,400 |
| 2540E | Automatic gravity | 9.5L | $3,500 | $700–$1,800 |
| 3850E | Automatic gravity | 14.5L | $5,500 | $900–$2,500 |
| 2340M/E | Compact tabletop | 6.5L | $2,200 | $400–$1,100 |
| Elara 11 | Prevacuum, class B | 11L | $8,500 | $2,000–$4,500 |
Midmark (Ritter)
Dominant in physician office sterilization. The Midmark M9/M11 are the most recognized autoclaves in US clinical practice.
Popular models:
| Model | Type | New Price | Used Range |
|---|---|---|---|
| M9 (Ritter M9D) | Automatic gravity | $4,500 | $800–$2,200 |
| M11 | Automatic gravity | $6,000 | $1,000–$2,800 |
| SciCan Statclave | Gravity tabletop | $3,800 | $700–$1,800 |
Pelton & Crane (Hu-Friedy)
Popular in dental. The Delta and Validator series are widely available used.
AMSCO / Steris
Large floor-standing units for hospital SPD departments and ambulatory surgery. The AMSCO Eagle and Century series are widely available.
Used prices: $2,500–$12,000 depending on size and configuration
Getinge (Storsafe, HS series)
European manufacturer common in large hospitals. Excellent build quality.
Used prices: $3,000–$15,000
Scican (Statim)
The Statim cassette autoclave is a niche product popular for dental handpiece sterilization — fast cycles (9–14 minutes), small footprint.
Used prices: $600–$2,500
Autoclave Sizing Guide
Chamber size determines instrument load per cycle. For clinical settings:
| Practice Type | Recommended Chamber Size | Recommended Type |
|---|---|---|
| Solo dental practice | 6–10L tabletop | Gravity or B-class prevacuum |
| Group dental (3+ chairs) | 10–17L tabletop or floor unit | Prevacuum |
| Physician office | 8–14L tabletop | Gravity (Midmark M9/M11) |
| Ambulatory surgery center | 17–30L floor unit | Prevacuum |
| Hospital SPD | 60L+ large floor unit | Prevacuum, steam flush |
| Veterinary practice | 8–17L tabletop | Gravity |
| Research lab | Variable | Gravity or prevacuum |
Critical Inspection Points for Used Autoclaves
Physical Condition
- Chamber interior free of corrosion, scale, or damage
- Door gasket (seal) intact, no cracks or compression set
- Door mechanism and locking mechanism function smoothly
- Safety valve (pressure relief valve) present and functional
- Water reservoir clean, no mineral scale buildup
- External surfaces, controls, and display intact
Functional Testing
- Complete cycle runs successfully with test load
- Temperature and pressure reach required parameters (121°C/15psi for gravity; 134°C/30psi for prevacuum)
- Automatic timer and cycle controls function
- Printer/recorder produces legible output (if equipped)
- Dry cycle functions (for wrapped instrument sets)
Biological and Chemical Testing
Before clinical use, you must validate the autoclave:
- Class 4 or 5 chemical indicators in each load
- Biological indicator (BI) test — Geobacillus stearothermophilus spore strips — to confirm sterilization efficacy
- Bowie-Dick test — for prevacuum autoclaves only; confirms vacuum integrity
Documentation
- Service history records
- Last PM date
- Validation testing records (especially for ASC and hospital settings)
Maintenance Costs: What to Budget
| Maintenance Item | Frequency | Cost |
|---|---|---|
| Door gasket replacement | 1–3 years | $50–$200 |
| Distilled water (for reservoir) | Ongoing | $2–$5/gallon |
| Biological indicator testing | Weekly (minimum) | $30–$80/box of 100 |
| Chemical indicator strips | Each load | $15–$40/box |
| Descaling / deliming | 6–12 months | DIY $15 or service $150–$300 |
| Annual PM service | Annually | $250–$600 |
| Element replacement | As needed | $150–$400 |
Where Autoclaves Fail: Common Issues
- Worn door gasket — Most common failure; $50–$200 to replace; easy DIY
- Scale buildup on heating element — Use distilled water only; causes cycle failures and element burnout
- Failed solenoid valve — Controls water inlet; $100–$250 to replace
- Pressure safety valve — Should be tested annually; replace every 3–5 years (~$100)
- Electronic control board failure — $300–$800 to replace; worth checking parts availability before purchase
Check parts availability for any used autoclave model before buying. Tuttnauer and Midmark have excellent parts supply; obscure brands may be unsupportable.
For Lab Use
If you need autoclaves for laboratory use rather than clinical sterilization, see our lab-focused resources at lab-equipment.net and used-lab-equipment.com. Lab autoclaves often have larger chambers, liquid sterilization cycles, and different validation requirements.
Pricing Summary (2026)
| Equipment Type | New Price | Used/As-Is | Refurbished |
|---|---|---|---|
| Tabletop gravity autoclave (9–14L) | $3,000–$7,000 | $400–$1,800 | $1,000–$3,500 |
| Tabletop prevacuum (Class B) | $6,000–$15,000 | $1,500–$4,000 | $3,000–$7,000 |
| Floor-standing (17–30L) | $10,000–$30,000 | $2,500–$8,000 | $5,000–$14,000 |
| AMSCO/Steris large unit | $25,000–$60,000 | $3,000–$12,000 | $8,000–$20,000 |
| Sterrad H2O2 Plasma | $60,000–$120,000 | $8,000–$20,000 | $15,000–$35,000 |
| Dry heat sterilizer | $800–$3,000 | $200–$800 | $400–$1,500 |
Where to Buy Used Autoclaves
eBay
The deepest online market for used autoclaves — tabletop units dominate. Filter by brand, type (gravity vs. prevacuum), and location to control shipping costs.
Browse Used Autoclaves on eBay →
Amazon
Good for tabletop Tuttnauer and Midmark units, primarily through medical equipment dealers.
Lab Equipment Sources
For lab autoclaves and sterilizers, check used-lab-equipment.com and lab-equipment.net.
IAMERS Dealers
For Sterrad and large floor-standing units, contact certified dealers via usedhospitalequipment.org.
Frequently Asked Questions
Q: What size autoclave do I need for a dental practice? A: A solo dentist with 2 treatment rooms typically needs a 9–11L tabletop unit. A 3-chair practice should consider 14–17L. If you use wrapped instrument sets (pouches), you need a prevacuum (Class B) autoclave for proper steam penetration.
Q: Can I use tap water in my autoclave? A: No. Always use distilled or deionized water. Tap water contains minerals that deposit on heating elements and chamber surfaces, causing corrosion and cycle failures. This is the #1 cause of premature autoclave failure.
Q: How do I verify a used autoclave is actually sterilizing? A: Run a biological indicator test (BI test) with Geobacillus stearothermophilus spore strips. If the BI test passes after a full cycle, the autoclave is achieving sterilization conditions. For prevacuum units, also run a Bowie-Dick test to confirm vacuum integrity.
Q: What is the difference between Class N, Class S, and Class B autoclaves? A: These are European EN 13060 classifications. Class N (naked): solid, unwrapped items only. Class S (specified): manufacturer-specified wrapped items. Class B (big): all load types including hollow items, wrapped sets, and porous materials. Most dental clinics need at minimum Class S; ideally Class B for wrapped instrument packs.
Q: Is a used Sterrad worth buying? A: The Sterrad NX and 100NX are excellent investments for ASCs and hospitals needing low-temperature sterilization. Used units at $8,000–$15,000 offer significant savings vs. $60,000+ new. Key check: confirm cassette/cycle availability (J&J has transitioned to the Sterrad 100NX and discontinued older cassette formats).
Related Guides
- Complete Guide to Buying Used Hospital Equipment
- Hospital Equipment Maintenance: Schedules & Costs
- Used Lab Centrifuges: Types, Brands & Where to Buy
- Certified Refurbished vs Used Medical Equipment
Affiliate Disclosure: This page contains affiliate links to eBay and Amazon. We may earn a commission on qualifying purchases at no additional cost to you. Sterilization validation is required before using any autoclave for patient care — consult your infection control protocols.