What Is Dry Air Purge?

Dry air purge systems are used in environmental test chambers to reduce the humidity index of the chamber interior at an expedited rate creating a dry atmosphere. The system injects a source of dry air into the workspace to create a less humid environment. Dry air purge systems are commonly used on temperature and humidity test chambers, but temperature-only chambers can also benefit from the systems because they control any residual moisture generated by temperature changes within the chamber.

HOW DO DRY AIR PURGE SYSTEMS WORK?

Dry air purge systems typically use either a heatless desiccant dryer or a customer-supplied dry air source. The system operates by injecting a source of dry air into the workspace. This injection creates a slight positive pressure inside the workspace, which results in existing moist air being forced out of the workspace through a vent port. Then ultra-dry compressed or inert gas is added to the air. The system performs excellently in areas with high humidity as it lowers the dew point. Compressed air and low dew points are key for the functionality of these highly effective systems in low temperatures.

Dry air purge systems include a flow meter, regulator, and control solenoid for program operation. Compressed shop air or inert gas can be utilized as the supply source Compressed shop air or inert gas can be utilized as the supply source and minimizes the moisture in the chamber. The most commonly used inert gases are nitrogen and carbon IV oxide gases. Other usable inert gases include argon and helium. In addition, the dry atmosphere protects moisture-sensitive samples and optimizes low-humidity testing.

TENNEY CHAMBERS WITH DRY AIR PURGE

Tenney Environmental chambers are available with dry air purge systems for applications where a low humidity atmosphere is necessary. Our chambers are designed and manufactured by an experienced team to meet our customer's testing requirements. To view our list of available temperature or temperature and humidity test chambers, click here.

Tenney 8.5SVO Vacuum Lab Oven

Tenney vacuum ovens are designed for drying, curing, outgassing, aging, process control and many other applications which require elevated temperature in reduced atmospheres. The vacuum oven includes microprocessor digital control, built-in over temperature protection as well as a door with full viewing window.

Chamber Size: 8.5 cubic feet

Key Specifications

Temperature Range: Ambient to +200°C
Control: <1°C
Vacuum Capability: 8mm/hg
Run up time to max. temp.: >2°C/minute
Tenney Benchmaster Test Chamber

Tenney Benchmaster Test Chamber

The Tenney Benchmaster temperature and humidity test chamber simulates a wide range of temperature or combined temperature and humidity conditions making it ideal for a variety of testing needs. The Benchmaster environmental chamber also features a one horsepower cascade refrigeration and two-kilowatt heating system that provides optimal cooling and heating performance. The five cubic foot internal workspace has the versatility to accommodate both small and large size test material. In keeping with the needs of today's lab environments, the Tenney Benchmaster climatic chamber design incorporates a compact exterior that maximizes the interior workspace.
Tenney Conditioned Air Supply System

Tenney Conditioned Air Supply Systems

The Tenney Conditioned Air Supply System is able to reliably and accurately cool or heat existing rooms and spaces.

Key Specifications

Temperature Range: -70°C to 90°C ± 0.3°C after stabilization
Tenney Environmental Walk In Room

Tenney Walk-In Environmental Test Chamber

Every Tenney environmental room features state-of-the-art equipment that reliably produces required conditions, structural integrity that keeps the room working properly through years of demanding test cycles, and measuring/monitoring equipment that precisely records all test data.

Chamber Sizes: 316, 366, 477, 539, 603, 744, 820, 983, 1069, 1160 and 1351 cubic feet (custom sizes can be designed and built)

Key Specifications

Temperature Range: -68°C to 85°C (Extended temperature ranges available upon request.)
Humidity Capability: 20% to 95% in the temperature range of 20°C to 70°C, limited by a 5°C dew point. Optional dry bulb temperature range to 85°C with RH control.
Tenney Junior Test Chamber

Tenney Junior Compact Temperature Test Chambers

The Tenney Junior temperature test chambers have been in the market for over 50 years. They are well suited for use in electronic, military, and pharmaceutical quality assurance and reliability testing, along with research testing and production processes. In keeping with the needs of today's lab, we specifically designed these benchtop and floor chambers to have a compact exterior yet an ample interior workspace to maximize valuable floor space.

Chamber Size: 1.2 cubic feet
Key Specifications

Temperature Range: -68°C to +180°C
Control: +/-1.0°C
Tenney C-EVO Reach In Test Chamber

Tenney C-EVO Temperature / Humidity Test Chamber

The Tenney C-EVO Temperature / Humidity Test Chamber is a world class environmental cycling test chamber loaded with standard features and advanced technological upgrades. Test Chamber Sizes: 10, 20, 30, 40 and 64 cubic feet
Temperature Range: -68°C to 180°C
Humidity Capability: 20% to 95% RH in the dry bulb range of +20°C to +85°C,limited by a 5°C dewpoint
Control: ±1.0°C ±5% RH
Tenney Altitude Chamber

Tenney Strat Altitude Test Chamber

Tenney’s altitude test chambers are designed to simulate extreme conditions with the combination of high altitude and humidity which subjects your products to a variety of atmospheres. The automatically controlled vacuum and vent valves in the Tenney Strat Altitude Test Chambers provide precise altitude conditions for consistent testing needs.
Test Chamber Size: 6.4 to 64 cubic feet
Key Specifications

Temperature Range: -70°C to +177°C
Humidity Capability: 20% to 95% RH in the dry bulb range of +20°C to +85°C, limited by a 5°C dewpoint
Standard altitude conditions: Site level to 100,000 Feet
Combined temperature and altitude: 60,000 feet maximum
Control: ±0.3°C and ±2% RH
Tenney SVO Reach-In Vacuum Oven

Tenney SVO Reach-In Vacuum Oven

The Tenney SVO Reach-In Vacuum Oven reaches precise altitude conditions for optimal test results with automatically controlled vacuum and vent solenoid valves.Convenient design allows for simultaneous depressurization and heating conditioning within one machine.

Chamber Size: 8 to 64 cubic feet

Key Specifications

Temperature Range: 15°C above ambient (approx.) to +150°C
Standard Pressure Conditions: Site level to 20.88mm Hg
Control: ± 0.3°C
Uniformity: ± 1°C

Tenney T2 Temperature / Humidity Cycling Test Chamber

A temperature and humidity cycling chamber ideal for simulating a wide range of temperature and humidity conditions. This temperature and humidity chamber is designed for mobility and to save on floor space. The T2 series of environmental chambers have minimal thermal transfer for accurate testing results.

Chamber Size: 2 cubic feet
Key Specifications

Temperature Range: -68°C to +180°C
Humidity Capability: 20% to 95% RH in the dry bulb range of +20°C to +85°C, limited by a 5°C dewpoint
Control: ±1.0°C ±5% RH
Tenney TC Cycling Test Chamber

Tenney TC Series Cycling Test Chambers

The TC Series of environmental cycling reach-in test chambers include both temperature-only chambers and temperature / humidity chambers. The Tenney TC Series Cycling Test Chambers offer design features for optimal performance such as a high volume horizontal-down air circulation system with an electric heating system and a mechanical refrigeration system. If the humidity option is selected, a vapor injection type humidification system is used to condition the product. A wide range of options can be added to enhance the equipment.

Test Chamber Sizes: 10 to 64 cubic feet

Key Specifications

Temperature Range: -68°C to +180°C
Humidity Capability: 20% to 95% RH in the dry bulb range of +20°C to +85°C, limited by a 5°C dewpoint
Control: ±1.0°C and ±5% RH

Tenney Thermal Shock Junior Test Chamber

The Tenney Thermal Shock Junior Test chamber provides two opposite temperature extremes for accurate and efficient temperature cycling and thermal shock testing. It also has a fully automatic chamber control which features an easy-to-read alphanumeric display.

Test Chamber Size: .25 cubic feet

Key Specifications

Temperature Range: -65°C to +200°C

Tenney Thermal Shock Test Chamber

The Tenney Thermal Shock Test Chamber is designed for the safe, efficient, and accurate environmental testing of electronics and consumer products, and aerospace, telecommunications, and military and defense components. Non-hazardous, non-flammable, non-volatile materials only.

Test Chamber Size: 2 to 8 cubic feet

Key Specifications

Temperature Range: -73°C to +200°C

Tenney UTC Upright Environmental Test Chamber

The Upright Test Chamber (UTC™) is designed to occupy a smaller footprint. This reach-in test chamber features a vertical configuration to take up less floor space while staying within the same price range as other test chamber models. The Tenney UTC environmental chamber's compact design meets a growing need of laboratory environments. Despite its space-saving qualities, the UTC climatic chamber has a wide range of both temperature and humidity conditions to meet a variety of today's testing needs.

Chamber Size: 5 cubic feet

Key Specifications

Temperature Range: -68°C to +180°C
Humidity Capability: 20% to 95% RH in the dry bulb range of +20°C to +85°C, limited by a 5°C dewpoint
Control: ±1.0°C ±5% RH
Tenney Space Test Chamber

Tenney Vacuum Space Chamber

The Tenney Vacuum Space Chamber is an environmental test chamber that simulates various pressure and altitude conditions. These thermal vacuum chambers are ideal for testing products for the space industry. Tenney space chambers are custom designed to meet your specific testing needs.

Chamber Size: 2.65 to 226 cubic feet

Key Specifications

Temperature Range: -70°C to +125°C (-94°F to +257°F)
Tolerance: ±1.0°C after stabilization
Vacuum Simulation: Site level to 1 X 10-7 Torr
The system can attain 5.0 x 10-6 within four hours
Tenney FCR Chamber

Tenney Fast Change Rate Chambers

The Tenney Fast Rate Change Test Chamber is designed to simulate the harshest environmental conditions at an accelerated rate from -35°C to 200°C Single Stage, or -73°C to 200°C Cascade. The Fast Rate Change chambers feature scroll compressor technology, provide quiet operation, fast transition rates, and reliable operation. 
Tenney Battery Test Chamber

Tenney SafeTest™ Battery Test Chamber

The Tenney SafeTest™ systems offers a comprehensive line of standard and optional test chamber safety features that can be customized to fit your company’s battery-testing needs. Tenney battery test chambers are used in the automotive, computer, telecommunications, defense, and alternative-energy industries.