# Tuttnauer 3870EA Review: Large-Capacity Autoclave for Surgical Sterilization

If your surgical suite, ASC, or busy clinic is outgrowing a benchtop sterilizer — or if you're still running wrapped instrument packs through an older gravity-cycle unit and wondering why cycle times are dragging — the Tuttnauer 3870EA deserves a hard look. It's a fully automatic, pre-vacuum floor-standing autoclave designed for high-throughput sterilization, and it's one of the more commonly traded units on the used medical equipment market. This review breaks down exactly who it's built for, what it does well, and where it falls short.

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## Product Overview

The Tuttnauer 3870EA is a Class B fully automatic steam autoclave with a **23-liter (approximately 1.4 cubic foot) rectangular chamber**. The "E" in the model name denotes the electronic control package — a PLC-based controller with a digital display and automatic cycle selection — while the "A" stands for automatic door lock. This is a pre-vacuum (also called pre-vac or fractional vacuum) unit, meaning it pulls vacuum before and during the steam phase to drive steam penetration into porous loads, wrapped instrument sets, and hollow devices.

**Key specifications at a glance:**

| Spec | Detail |
|---|---|
| Chamber capacity | 23 L (rectangular) |
| Cycle type | Pre-vacuum (Class B) + gravity |
| Sterilization temp | 121°C (250°F) / 134°C (273°F) |
| Control system | Electronic PLC with digital display |
| Door mechanism | Fully automatic locking |
| Power requirements | 208–240V, single or three-phase (verify before purchasing) |
| Warranty (new) | 1 year parts and labor |
| Country of origin | Israel / US-serviced |

The 3870EA sits in Tuttnauer's "EZ" / "EA" series, which has been a workhorse in US surgical centers, dental schools, veterinary hospitals, and tattoo studios for well over two decades. Used units are widely available, which makes this a common option for buyers who want institutional-grade sterilization without the price tag of a new unit.

See our [autoclave buying guide](/Autoclave) for a broader breakdown of how to evaluate any sterilizer purchase.

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## Hands-On Experience

### Setup and Installation

The 3870EA is a bench-top or cart-mounted unit that requires a dedicated electrical circuit (208–240V), a plumbed water supply or a built-in reservoir depending on configuration, and a drain connection. This is not a plug-and-play countertop sterilizer — plan on a half-day installation with an electrician and a biomedical technician if you're setting it up in a new location.

Once connected, the electronic control panel walks through a startup sequence automatically. Operators select a cycle program (wrapped/unwaved, liquid, or vacuum test) from the front panel, load the chamber, close the door, and press start. The door locks automatically, the unit pulls its pre-vacuum, floods with steam, holds at temperature, and then exhausts and dries before unlocking the door. The entire wrapped instrument cycle typically runs **45–60 minutes** depending on load density and drying time selected.

### Daily Use

The rectangular chamber geometry is a genuine advantage over round-chamber tabletop units. Standard sterilization trays and cassettes fit cleanly, and you can load multiple trays simultaneously. In a busy surgical center processing 15–25 instrument sets per day, the 23L capacity means fewer loads compared to a 9L or 11L benchtop alternative.

The automatic door is a workflow accelerator — operators don't need to manually spin a wheel or engage a latch under the pressure of a turnover. The door seals and releases without manual intervention once the cycle is complete.

The digital display shows cycle phase, temperature, and pressure in real time. The unit also prints a cycle record if connected to a built-in or external printer — an important compliance feature for facilities that document sterilization logs.

### Standout Features

- **Pre-vacuum cycle**: Essential for wrapped packs, hollow lumens, and porous materials. Gravity-only units cannot reliably sterilize these load types.
- **Automatic door**: Reduces operator error and speeds turnovers.
- **Validated cycle programs**: Cycles are validated to EN 13060 Class B standards (European) and meet AAMI ST79 guidance applicable in the US.
- **Durable construction**: Stainless steel chamber and door, built to handle decades of daily cycling in clinical environments.

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## Pros and Cons

**Pros**
- Large 23L rectangular chamber handles full tray loads efficiently
- Pre-vacuum cycles sterilize wrapped, hollow, and porous instruments reliably
- Fully automatic operation reduces operator error
- Strong track record in clinical settings — widely serviced in the US
- Good availability of used units with known service histories
- Cycle documentation via printer supports compliance requirements

**Cons**
- Requires hard-wired electrical and plumbed installation — not portable
- Older used units may need new door gaskets, heating elements, or control board service
- 208–240V power requirement rules out standard 110V outlets
- Cycle time (45–60 min for wrapped loads) is not the fastest option for flash sterilization needs
- Replacement parts, while available, can run $200–$800+ for major components
- No USB or network connectivity on older firmware versions

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## Performance Breakdown

| Category | Rating | Notes |
|---|---|---|
| Build Quality | ★★★★★ | Stainless steel chamber, industrial-grade construction designed for 20+ year lifespan |
| Chamber Capacity | ★★★★☆ | 23L handles high-volume clinical workflows; not in the same class as a large floor autoclave |
| Cycle Reliability | ★★★★★ | Pre-vacuum Class B cycles are consistently validated; minimal operator error with auto door |
| Ease of Use | ★★★★☆ | Electronic panel is intuitive; installation complexity is the friction point |
| Value (used) | ★★★★☆ | Used units at $1,100–$18,000 depending on condition; excellent value versus new at $25,000+ |

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## Who Should Buy the Tuttnauer 3870EA

**This autoclave is the right call for:**

- **Ambulatory surgical centers (ASCs)** processing 10–30 wrapped instrument sets per day and needing a validated pre-vac sterilizer that meets accreditation standards
- **Oral surgery and periodontist offices** that sterilize bagged/wrapped handpieces, cassettes, and pouched instruments in volume
- **Veterinary hospitals** (especially equine or large-animal practices) that need large-chamber sterilization for surgical packs
- **Tattoo and body piercing studios** operating at high volume and wanting the reliability of a clinical-grade unit
- **Used equipment resellers** who know how to evaluate and service the platform — it's a safe buy if the service history is documented

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## Who Should Skip This

- **Small single-practitioner offices** with low daily instrument volume — a tabletop unit like the Tuttnauer 2340M or Midmark M9 will meet your needs for a fraction of the cost and footprint
- **Labs needing flash sterilization (unwrapped, immediate-use)** — the 3870EA's cycle times are not optimized for flash; a dedicated flash sterilizer is a better fit
- **Facilities without 208–240V electrical capacity** — rewiring for a dedicated circuit is an additional cost that may shift the value calculation
- **Buyers without biomedical service access** — if you can't get a qualified technician to perform annual PM and validation, don't invest in a unit at this price point

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## Alternatives Worth Considering

### Tuttnauer 2540EKA

A smaller (16L) automatic unit from the same manufacturer. If your daily volume is lower, the 2540EKA offers the same pre-vacuum capability and Tuttnauer reliability in a more compact footprint — and used units are typically $3,000–$8,000 less. [Search for the Tuttnauer 2540EKA on eBay](ebay:search:tuttnauer+2540eka+autoclave).

### Midmark M11

The Midmark M11 is a 10L ultraclave that dominates the dental and small-practice market. It's not a pre-vac unit and can't match the 3870EA's chamber size or cycle type, but if your load is primarily pouched instruments and not wrapped packs, the M11's simplicity and Midmark's domestic service network are hard to beat at the $2,000–$5,000 used price point. [Search for the Midmark M11 on Amazon](amazon:search:midmark+m11+autoclave).

### Getinge (Castle) 1730/1733 Series

Getinge's bench-top pre-vac autoclaves are a common 3870EA alternative in hospital settings. They offer similar cycle capabilities with a slightly different chamber geometry. Used Getinge units are often available through hospital surplus channels and have strong service network support. [Search for Getinge autoclaves on eBay](ebay:search:getinge+castle+autoclave+pre+vacuum).

Also see our [disinfection equipment guides](/Disinfection) for complementary sterilization options.

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## Where to Buy

### eBay — Best for Used Units with Documented History

eBay is the most active marketplace for used clinical autoclaves in the US. There are currently active listings for the Tuttnauer 3870EA including a unit from **medicalusa priced at $17,999** — which reflects a refurbished or low-hour unit with some level of testing or certification. Budget buyers can find units in the $1,000–$3,000 range that require service before use.

**[Search for Tuttnauer 3870EA on eBay](ebay:search:sterilization+surgery+tuttnauer+3870ea+fully+automatic+large+capacity)**

Tips for buying on eBay:
- Filter by "Sold Listings" to calibrate real market price
- Look for "Top Rated" sellers with return policies
- Ask for cycle count documentation, last PM date, and any known repairs
- Confirm power requirements (208V vs 240V, single vs three-phase) before bidding

### Amazon — New and Refurbished Options

Amazon carries new Tuttnauer units and accessories (trays, gaskets, printer paper) through authorized dealers. Pricing on new units runs $22,000–$28,000, but Amazon offers buyer protections and manufacturer warranty support that private eBay sales do not.

**[Search for Tuttnauer 3870EA on Amazon](amazon:search:sterilization+surgery+tuttnauer+3870ea+fully+automatic+large+capacity)**

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## Frequently Asked Questions

**What is the difference between the Tuttnauer 3870EA and 3870EK?**
The "EA" model has a fully automatic door, while the "EK" model has a manual door crank. Both use the same chamber and cycle programming. In high-volume clinical settings, the automatic door of the EA is a meaningful operational advantage.

**Can the Tuttnauer 3870EA sterilize wrapped instrument packs?**
Yes. The pre-vacuum cycle is specifically designed for wrapped, pouched, and packaged instruments. It pulls vacuum before steam injection to ensure steam penetrates through wrapping material and into hollow devices — something a gravity-only cycle cannot reliably do.

**How long does a cycle take on the Tuttnauer 3870EA?**
A standard wrapped instrument cycle runs approximately 45–60 minutes, including the pre-vacuum phase, sterilization hold (4 minutes at 134°C is typical), and drying. Liquid cycles and gravity cycles run shorter but are not appropriate for wrapped loads.

**What maintenance does the Tuttnauer 3870EA require?**
Annual preventive maintenance should include door gasket inspection/replacement, chamber descaling (if hard water is used), heating element check, safety valve test, and cycle validation. Estimated annual PM cost with a biomed technician is $300–$800 depending on labor rates and parts needed.

**Is a used Tuttnauer 3870EA a good buy?**
It depends on condition and service history. The platform is well-supported and parts are available. A unit with documented PM history and a recent cycle validation is a strong value at $5,000–$12,000. Units sold "as-is" with unknown history carry meaningful repair risk.

**Does the Tuttnauer 3870EA meet AAMI/Joint Commission sterilization standards?**
The 3870EA's Class B pre-vacuum cycles are designed to meet AAMI ST79 guidance. However, compliance depends on proper installation, spore testing (BI testing) per your facility's protocol, and cycle documentation. The unit does not automatically confer compliance — your sterilization program management does.

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## Final Verdict

The Tuttnauer 3870EA is a proven, high-volume clinical sterilizer that has earned its reputation in surgical centers and busy practices across the US. Its 23L pre-vacuum chamber, automatic door, and validated cycle programs make it one of the most capable units available in the used equipment market at its price range. We recommend it for medium-to-high volume surgical facilities that have the electrical infrastructure, service access, and volume to justify it. If you're processing 10 or more wrapped instrument sets daily and need a unit that will hold up through thousands of cycles, the 3870EA is a sound investment — especially sourced from a reputable seller with documented service history.