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Terra Part # Price Ships in
Acrylic 11.5" 10" 11.5" ISO 6 Front Swinging 5235-80 78342 $1,401 1-3 Days 2
Quick Ship+ Available 17 in stock
Acrylic 16.875" 17.5" 8" ISO 6 Front Swinging 5235-81 78343 $1,676 1-3 Days 3
Quick Ship+ Available 12 in stock
Acrylic 16.875" 17.5" 16" ISO 6 Front Swinging 5235-83 78345 $2,307 1-3 Days 4
Quick Ship+ Available 20 in stock
Acrylic 16.875" 17.5" 20" ISO 6 Front Swinging 5235-84 78346 $2,622 1-3 Days 5
Quick Ship+ Available 15 in stock
Acrylic 22.125" 23.5" 8" ISO 6 Front Swinging 5235-82 78344 $2,173 1-3 Days 6
Quick Ship+ Available Only 6 left in stock
Acrylic 22.125" 23.5" 20" ISO 6 Front Swinging 5235-86 78348 $3,864 1-3 Days 7
Quick Ship+ Available Only 8 left in stock
Acrylic 22.375" 23.5" 16" ISO 6 Front Swinging 5235-85 78347 $3,300 1-3 Days 8
Quick Ship+ Available 19 in stock
Acrylic 30" 30" 4" ISO 6 Front Swinging 3305-81 77823 $2,041 15-20 Days 9
Acrylic 30" 30" 10" ISO 6 Front Swinging 3305-83 79033 $3,388 1-3 Days 10
Quick Ship+ Available Only 3 left in stock
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Custom-configured product. Contact Terra by phone, chat or email for a project-specific quote.
Custom-configured product. Contact Terra by phone, chat or email for a project-specific quote.
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Product Details
Product Details
  • Available ISO Ratings: ISO 6, ISO 7, ISO 8
  • Acrylic vacuum desiccator cabinet with 1" thick walls supports full vacuum to 29.9" Hg
  • Spacious vacuum chambers with front-swing doors allow for quick access and easy transfer of parts
  • Removable and adjustable shelf system allows for faster batch processing of smaller parts
  • Units individually tested to hold full vacuum 29.9"Hg with no detectable change for 72 hours
  • Customizable with feedthroughs for electrical connections inside vacuum chamber
  • Ideal for degassing small parts and mixed liquids, vacuum encapsulation, and general purpose vacuum experiments
  • Provides a safe, convenient way to store moisture- and particle-sensitive materials
  • The front access door and shelving provide maximum storage space while maintaining easy accessibility to full inventory
  • Transparent acrylic provides full visibility and helps locating stored parts
  • Clear acrylic construction provides full visibility of parts
  • Solvent-welded construction with continuous seams fuses walls together into one piece
  • O-ring inlaid in precision-routed channel, helps ensure uniform and ultra-low leak rate
  • Includes a vacuum gauge and two mini ball valves to permit flushing of the chamber with purge gas after application of vacuum
  • Cleanroom compliant design includes corrosion resistant, non-particle shedding hardware
  • Optional vacuum/nitrogen pumps and vacuum safety relief valves available separately
  • Contact to discuss custom sizes and applications, including installation of cable feed-throughs
  • CAUTION: Acrylic is damaged by alcohol and many other cleaning agents. Use only water and mild detergent

Vacuum Chambers

  • Vacuum chambers animation Watch Terra's Vacuum Chamber Video
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  • Acrylic vacuum chamber on top of electric height adjusting table Vacuum Chamber on Electric Height Adjusting Table
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  • Flat Acrylic Vacuum Chamber Acrylic Vacuum Chamber
  • Vacuum Chamber Acrylic Acrylic Vacuum Chamber
  • Acrylic Cube Vacuum Chamber Acrylic Vacuum Chamber
Vacuum chambers animation
Features & Benefits

Features and Benefits

Learn More: Acrylic Vacuum Chambers

More Information

  • Ideal for degassing small parts and mixed liquids, vacuum encapsulation, and general purpose vacuum experiments
  • Provide a safe, convenient way to transport moisture- and particle-sensitive materials
  • Clear acrylic construction provides full visibility of parts
  • Sturdy construction and inlaid O-ring seal supports vacuum level down to 29.9" Hg (see ordering tables for vacuum capacity of each model)
  • Solvent welding, 304 stainless steel and chrome-plated hardware ensure a completely noncontaminating environment
  • Call to discuss custom sizes and applications, including installation of cable feed-throughs

These economical vacuum chambers provide a safe, reliable means for transporting contamination- and moisture-sensitive parts. They are also ideal for degassing operations, biological tests, material testing and other processes requiring sustained low and intermediate vacuums.

Cleanroom-Compatible Construction

Seven different sizes are available; all support vacuums to 29.9" Hg. All models are fabricated of transparent 1" (25 mm) thick acrylic, 0.52" (13 mm) acrylic on No. 5235-08. They feature chrome-plated latches to ensure a noncontaminating environment.

Terra installs a vacuum gauge and two metering valves to permit flushing of the chamber with purge gas before application of vacuum. Terra also features a full line of vacuum/nitrogen pumps. Recommended pump and accessories.

Note: Due to the inherent permeability of plastic, these chambers will not maintain a stable vacuum level over extended periods. For long-term vacuum maintenance, leave vacuum pump connected and running.

Why so Thick and Heavy?

Although your application may not require vacuum levels to 29.9"Hg, Terra builds its chambers to support this vacuum level due to safety concerns.

Variations in operators and operating protocol may lead to inadvertent spikes in vacuum pressure. Because these chambers are small, a few moments of vacuum operation beyond your target vacuum can subject them to substantially higher stress than you intend. Even a safety release switch is no guarantee that a chamber won't experience high vacuum pressure since these valves are not tamper-proof.

The best way to guarantee the safety of your parts and personnel is to use a chamber designed to sustain high vacuum levels. That's why Terra fabricates these chambers of 1"-thick acrylic.

Vacuum Leak Test, 0-72 hours

Chambers lose vacuum pressure initially due to air released from acrylic walls during first three hours. If vacuum level of 29.9"Hg is restored following this initial drop in vacuum pressure, chambers hold 29.9"Hg with no detectable change in pressure over duration of test.

Aluminum vs. Plastic

Terra offers chambers in both materials. Which is right for your application?

  • Acrylic Chambers
    • Economy: Lower material cost translates into a less expensive chamber.
    • Full visibility: You can add windows to an aluminum chamber, but nothing beats the 360-degree visibility offered by acrylic.
  • Aluminum Chambers
    • Chemical resistance: Aluminum stands up to Spor-Klenz®, alcohol and other sterilants, making it preferable in many bio/pharmaceutical applications. In addition, because many joining and sealing compounds are designed for use with metals, they may degrade acrylic and result in leaks or chamber failure.
    • Greater machining versatility: Aluminum allows easier addition of feed-throughs to accommodate power and data cords, electrodes and other accessories. These add-ons are more feasible on aluminum than acrylic chambers, which are more prone to cracks that develop into leaks over time. For such applications, an aluminum chamber is a wiser long-term processing solution.
    • More effective moisture barrier: Acrylic, because it is hygroscopic, allows moisture penetration on a molecular level. Under vacuum, these water molecules are released from the surface and may require several vacuum cycles to remove. These issues don’t occur with aluminum and other metallic moisture barriers.
    • Greater dimensional versatility: Due to greater strength, aluminum is more appropriate than acrylic for larger chamber sizes.

Vacuum Chamber Pre-Cycle

For optimal vacuum chamber performance, a pre-cycle must be performed to remove trace moisture clinging to the internal acrylic surfaces. Run the pre-cycle until vacuum pressures stabilize at 29.9" Hg, then begin standard operation.

Adjustable Shelving for Faster Batch Processing

Vacuum desiccator cabinets with front swing doors feature adjustable shelving for faster batch processing.

Spacious Interior for Added Storage Capacity

This acrylic vacuum chambers are available in 16”H and 20”H interiors with two pairs of racks for flexible shelving configurations. The deep sliding trays allow easy storage for small parts and materials.

Coaxial SMA Feedthrough

Double-ended, 50-ohm connectors allow small electronics to operate within the chamber.

Optional Vacuum Relief Valve

Adjustable pressure relief valve limits vacuum levels within the chamber, allowing pressure to be maintained at user-configured point. (NOTE: Vacuum pump must remain in operation to maintain desired vacuum level).

Tested to Hold Full Vacuum for 72 hours

Terra's acrylic vacuum chambers are tested to hold 29.9"Hg (99.9% vacuum) with no detectable change over a 72 hour duration. Heavy-duty one-inch-thick walls ensure chamber integrity and protect against cracking.

Precision Vacuum Gauge and Needle Valves

Vacuum chambers can be customized to include precision needle valves for exact application, monitoring, backfill, and bleeding of vacuum pressure in increments of ~1" Hg (~3% vacuum). The hardware is mounted over an extra layer of acrylic to prevent damage to the lid while the chamber is under maximum vacuum.

Optional Glass Top for Sensitive Optics

0.75"-thick tempered-glass top allows optical testing and monitoring that requires high clarity.

Extra Wide Acrylic Vacuum Chamber with Hinged Front Door

Acrylic vacuum chamber with extra wide mouth and hinged door lets you easily feed long parts through for speedy and hassle-free transfer.

Inlaid Rubber O-Ring for Uniform Seal

Precision-routed channel and inlaid rubber O-ring ensures a uniform seal around the lid of your vacuum chamber. The O-ring is also removable in case it needs to be replaced.

Products Compliant With Your ISO Rating

Provide Terra with your desired ISO rating. We will tailor the product to meet your rating and supply a certificate of compliance appended to your invoice, to be included in your compliance package. All certificates are archived in Terra's system for quick retrieval.
Available Accessories
Popular Accessories
For a full list of accessories, select a product then click Choose Accessories on that product page.
  • Universal Base Stands Offer Excellent Versatility

    Universal base stands support and stabilize various equipment sizes. Adjustable telescoping members allow for a precise fit. Choose between stainless and powder-coated steel to fit your desired application.
  • Universal Stand Adjusts to Fit a Wide Range of Equipment

    Terra's Universal stands easily adjust to fit a wide range of equipment. Multi-purpose stand frames are suitable for many types of cleanroom equipment, including refrigerators, freezers, incubators, ovens, and vacuum chambers.
  • Laboratory Nitrogen Generator

    Terra’s Nitrogen Generators provide a continuous, reliable supply of clean, dry nitrogen up to 99% pure to eliminate dependence on bulky canisters to operate desiccators and glove boxes.
  • Multi-pin Feedthrough

    Optional 25-pin connector can be used to monitor conditions within the vacuum chamber.
  • 2 Pin Feed-Through

    SMA Coaxial Feedthrough, 50 Ohm matched impedance, 2 pins, grounded shield, double-ended, 2.75" conflat flange, without air-side connector
  • Electrode Feedthrough

    Optional cord/cable feed-throughs for power cords, sensor cables, data lines and thermocouple connectors.
  • Welch Rotary Vane Vacuum Pump

    This Rotary Vane vacuum pump offers high water vapor tolerance, light weight and high vacuum performance, making it ideal for many laboratory uses.
  • PC-Based Vacuum Control with Data Logging

    The eVAC Digital Vacuum Controller provides highly flexible control over vacuum levels by incorporating an electronically activated bleed valve, which adds the capability to reduce the applied vacuum.
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