Vacuum Desiccators

A vacuum desiccator incorporates an enclosure, vacuum pump, and desiccant system for achieving low RH values at sustained vacuum down to 29.92" Hg. Vacuum desiccators sustain atmospheric temperature, humidity, and process-gas mixtures during product assembly, testing, anaerobic processes, or reactive material handling.

Terra Universal's nitrogen purge vacuum desiccators remove humid air and backfill the chamber with dry, inert gas to achieve neutral pressure. If needed, this process is repeated until oxygen or moisture concentration reaches the desired level. Gauges and valves preinstalled on vacuum chambers allow for careful application, monitoring, backfilling, and bleeding of vacuum pressure. The cabinet doors allow high-capacity storage, easy batch processing, and quick parts transfer.

Silica-based desiccants and canisters are economical for maintaining a dust-free enclosure with unspecified humidity requirements. Terra Universal and Bel-Art vacuum desiccators also support moisture removal via silica-gel and desiccant canisters. Disposable Desiccant Plates are an economical option for moisture removal and turn pink to indicate maximum moisture absorption. Reusable desiccant canisters provide a low-waste option; the silica-gel desiccant is reusable after oven baking.

In some cases, a vacuum chamber alone may provide adequate humidity removal without requiring nitrogen or desiccants. Ideally, the vacuum chamber is supplied with pre-treated and dehumidified air. A vacuum drying system is most effective when room air is less humid and the chamber does not require frequent access.

Terra’s Vacuum Desiccators and Vacuum Chambers are shipped fully assembled. Buy online, or contact a Terra Universal specialist via chat, email, phone, or quote request.

Vacuum Desiccator Features and Benefits

Multi-pin Feedthrough

Optional 25-pin connector can be used to monitor conditions within the vacuum chamber.

Coaxial SMA Feedthrough

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

pressure relief valve mounted on acrylic vacuum 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.

vacuum gauge and needle valves installed to acrylic vacuum chamber

Precision Vacuum Gauge and Needle Valves

A vacuum gauge and two precision needle valves included with vacuum chambers allow 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.

Inlaid O-Ring

Precision-routed channel ensures uniform seal along chamber perimeter to provide an ultra-low leak rate.

plexiglass vacuum chamber, removable top lid with glass window

Optional Glass Top for Sensitive Optics

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

BEL-ART Vacuum Desiccator Clear Space Saver Group

Bel-Art Space Saver Vacuum Desiccator

Bel-Art Vacuum desiccators degas liquids quickly and easily in the laboratory or classroom. These shatterproof units also provide dry storage and protection for moisture-sensitive products.

Welch Rotary Vane Vacuum Pump
Chamber; Vacuum, Acrylic, 25"W x 10"D x 12.5"H
Aluminum Vacuum Chambers
Unique Designs to Your Specs!
PC-Based Vacuum Control with Data Logging
Terra Universal Vacuum Chamber Overview

The Rotary Vane vacuum pump withstands water vapor in the vacuum pump's inlet vapor stream | 7906-01A displayed 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.

Inch-thick acrylic chamber walls support vacuum to 29.9"Hg with full sample visibility | 5235-06B displayed Chamber; Vacuum, Acrylic, 25"W x 10"D x 12.5"H Inch-thick acrylic chamber walls support vacuum to 20.9"Hg with full sample visibility; all standard models include gauge and metering valves for vacuum application, monitoring, bleeding and process gas backfill.

Allows vacuum testing and processing to 29.9" Hg in a range of chamber sizes; aluminum walls sustain long-term vacuum without warping | 5235-30 displayed Aluminum Vacuum Chambers Allows vacuum testing and processing to 29.9" Hg in a range of chamber sizes; aluminum walls sustain long-term vacuum without warping.

High-capacity vacuum chamber includes piping, fittings and solenoid valve Unique Designs to Your Specs! Large capacity chambers available to meet special applications; model shown provides ample processing space for degassing large assemblies

eVac connection kit includes solenoid vacuum valve, hosing, clamps, adapters and hardware connection; laptop and chamber not included | 5235-45 displayed 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.

Terra Universal Vacuum Chamber Overview This video shows how to operate a vacuum chamber and explores available vacuum chambers and accessories Terra Universal offers

Technical Resources

video

Desiccators: Features and Design overview

Terra's nitrogen-purged desiccator cabinets meet dry storage requirements as low as 1% relative humidity. Standardization simplifies component upgrade, retrofit and replacement. Terra's Smart controllers allow setpoint control and even multiplexed purging for the most critical humidity requirements.

video

This mini-catalog features Terra's complete line of desiccator cabinets, which range from basic dry storage cabinets to a multiplex of individually controlled nitrogen-purged chambers. In addition to desiccators, this booklet also contains a sampling of Terra's cleanroom and laboratory products.

Terra Universal

Laboratory-Equipment

Terra Universal

Laboratory-Equipment

Vacuum Desiccators