Tuttnauer 3870EA Review: Is This Large-Capacity Fully Automatic Autoclave Worth It?

If your practice is processing high instrument volumes and a smaller benchtop sterilizer is becoming a bottleneck, the Tuttnauer 3870EA is one of the most frequently recommended upgrades on the market. But at price points ranging from $7,500 for a used unit to nearly $18,000 for a recent model, getting the right condition at the right price takes some due diligence. This review covers everything you need to know before you buy.

Product Overview

The Tuttnauer 3870EA is a large-capacity, fully automatic steam sterilizer designed for high-throughput clinical environments — dental practices, veterinary hospitals, surgical centers, and outpatient clinics. The "EA" in the model name stands for Electronic Automatic, meaning the door opens and closes automatically under electronic control, eliminating the manual door-closing step required on the 3870E.

Key Specifications:

• Chamber dimensions: approximately 15″ diameter × 30″ depth
• Chamber volume: approximately 66 liters (large tabletop class)
• Door operation: fully automatic (electronic)
• Cycle types: gravity displacement and pre-vacuum (where applicable)
• Display: digital LED panel with cycle status readout
• Printer: integrated cycle-data printer for compliance records
• Power: 208–240V, single-phase (verify outlet compatibility before purchase)
• Manufacturer: Tuttnauer USA (Hauppauge, NY); established sterilization brand with decades of hospital-grade production

For context, the 3870EA sits above Tuttnauer's smaller 2340 and 2540 series and competes directly with the Midmark M11 and SciCan Statim 7000S in the high-volume benchtop segment.

Hands-On Experience

Setup and Installation

Installing a 3870EA is more involved than a compact sterilizer. The unit requires a dedicated 208–240V circuit, a distilled-water supply line (or manual reservoir fill), and a drain connection. Most practices bring in a biomedical equipment technician for initial commissioning. Budget for that service call — trying to self-install to save money here often leads to cycle errors during validation testing.

Once plumbed and powered, the first step is running Bowie-Dick or biological indicator (BI) tests per your state health department's requirements. The 3870EA passes these routinely when water quality and door gasket condition are good.

Daily Use

In day-to-day operation, the automatic door is the standout feature. Load the tray cassettes, press the cycle selection button, and the door seals itself. This eliminates one of the most common user errors on manual-close autoclaves — an incompletely latched door that aborts a cycle mid-run. Cycle times run approximately 15–20 minutes for a standard gravity cycle at 134°C, plus drying time.

The integrated printer produces a paper tape record for each cycle showing temperature, pressure, time, and pass/fail status — a requirement in most accredited clinical environments. The tapes are narrow thermal paper; keep a supply of replacement rolls on hand.

The 15″ × 30″ chamber accommodates full-size instrument cassettes, bagged pouches on racks, and bulky wrapped instrument sets that simply won't fit in a tabletop unit. For a busy dental practice or a veterinary surgery suite, this capacity means running two or three loads per day instead of six or eight.

Standout Features

• Automatic door: Reduces user error and speeds turnaround
• Cycle documentation: Built-in printer keeps records without a separate data logger
• Volume: Chamber handles wrapped packs and large trays that smaller autoclaves cannot
• Brand reliability: Tuttnauer has an established parts and service network; technicians familiar with this platform are widely available

Pros and Cons

Pros

• Fully automatic door reduces cycle errors
• Large chamber volume dramatically cuts daily cycle count
• Integrated printer satisfies most accreditation documentation requirements
• Broad service network; replacement parts (gaskets, heating elements, solenoids) are readily available
• Well-proven design with long service life when maintained

Cons

• Requires 208–240V dedicated circuit — not plug-and-play in all operatories
• Footprint is significant; measure your counter or cart space before buying
• Used units need thorough inspection — door gaskets, heating elements, and solenoid valves are wear items
• Integrated thermal printer requires consumable tape rolls
• Higher purchase price than smaller sterilizers; harder to justify for low-volume practices

Performance Breakdown

Who Should Buy This

• High-volume dental practices processing 50+ instrument setups per day — the 3870EA will cut your sterilization bottleneck significantly
• Veterinary surgery centers sterilizing wrapped packs and bulky instrument sets that exceed smaller-chamber capacity
• Outpatient surgical centers that need documented cycle records for accreditation compliance
• Equipment buyers upgrading from a 2340 or 2540 series who are already familiar with Tuttnauer's service model
• Used equipment resellers — this platform holds value well and is easy to service

Who Should Skip This

• Low-volume practices running 5–10 packs per day — a 2540E or Midmark M9 is more cost-appropriate
• Facilities without a 208–240V outlet in the sterilization area — rewiring adds cost and complexity
• Buyers who cannot inspect the unit in person before purchasing a used model — door gasket and heating element condition are critical and difficult to assess from photos alone
• Anyone needing a Class B (vacuum-assisted) autoclave — verify cycle configuration on the specific unit; not all 3870EA variants include pre-vacuum

Alternatives Worth Considering

Tuttnauer 2540EA

If the 3870EA's footprint or price is too much, the 2540EA offers the same automatic-door convenience in a smaller chamber (approximately 10″ × 18″). It handles most dental and small-practice volumes at a meaningfully lower price point. Browse used Tuttnauer 2540EA units on eBay.

Midmark M11

The Midmark M11 is the primary competitor at this capacity class. It features a similar automatic door, strong DENTSPLY/Patterson service support, and is arguably slightly easier to find factory-trained technicians for in some regions. Price and availability are comparable. Search for Midmark M11 on eBay.

Pelton & Crane Validator 10

The Validator 10 is another large-chamber tabletop option, particularly common in dental group practices. Parts availability is acceptable but narrower than Tuttnauer's network. Worth comparing if you find one locally at a favorable price.

See our used autoclave buying guide for a broader comparison of sterilizer classes and what to inspect before buying used.

Where to Buy

For the Tuttnauer 3870EA, eBay's medical equipment marketplace consistently has the deepest inventory of used and refurbished units, with pricing ranging from approximately $7,500 to $18,000 depending on age, condition, and included accessories.

Current listings include units from established medical resellers — look for sellers with medical equipment specialization, detailed photos of the chamber interior and door gasket, and a documented service history or recent PM (preventive maintenance).

• Search for Tuttnauer 3870EA on eBay — filter by "Used" and sort by seller feedback rating
• Search for Tuttnauer 3870EA on Amazon — new and third-party listings; useful for pricing comparison

Buying tip: Always ask the seller for the last cycle count (if retrievable), the date of the last gasket replacement, and whether the unit passed a BI test within the last 90 days. A unit that cannot provide this documentation warrants a price discount or independent inspection before purchase.

FAQ

What does the "EA" mean in Tuttnauer 3870EA? EA stands for Electronic Automatic, indicating the door opens and closes automatically via an electronic motor drive. The 3870E (without the A) requires manual door closing. The EA version reduces operator error and is preferred in high-throughput settings.

What size chamber does the 3870EA have? The chamber is approximately 15 inches in diameter and 30 inches deep, giving it a volume of approximately 66 liters. This accommodates full-size instrument cassettes, wrapped packs, and bulky sets that exceed smaller benchtop sterilizer capacity.

How much does a used Tuttnauer 3870EA cost? Based on current eBay marketplace data, used units range from approximately $7,500 (older or higher-hours units from resellers) to $17,999 (recent, low-use units from medical equipment dealers). New units from authorized distributors typically run $20,000+.

What maintenance does the 3870EA require? Routine maintenance includes distilled-water reservoir cleaning, door gasket inspection and replacement (typically annually or per manufacturer's interval), biological indicator testing (frequency per your state's requirements), heating element inspection, and solenoid valve service. A preventive maintenance contract with a biomedical technician is strongly recommended.

Is the Tuttnauer 3870EA Class B? The standard 3870EA runs gravity displacement and (on some variants) pre-vacuum cycles, which approximates Class B performance. Confirm the specific cycle configuration with the seller — some units in the 3870 line are gravity-only. If your accreditation requires Class B (fractional pre-vacuum) certification, verify before purchasing.

Where can I get parts and service for the 3870EA? Tuttnauer USA (based in Hauppauge, NY) maintains a parts supply for the 3870 series. Parts are also available through independent biomedical equipment suppliers. The platform is widely serviced — most hospital biomedical departments and independent BMETs have experience with it.

Final Verdict

The Tuttnauer 3870EA is a well-engineered, high-capacity autoclave that earns its reputation in demanding clinical environments. The automatic door, large chamber, and integrated printer make it the right tool for practices that have genuinely outgrown smaller sterilizers. At $7,500–$10,000 for a well-maintained used unit, it offers excellent value — provided you inspect carefully and factor in a professional commissioning service call. If your volume doesn't justify the footprint and electrical requirements, the 2540EA or a comparable mid-range unit is the smarter choice. For high-throughput buyers, this is one of the most capable benchtop sterilizers on the used market.

Related: Used autoclave buying guide · Disinfection and sterilization equipment · Used dental equipment ```