What is an Environmental Test Chamber Used For?
Environmental test chambersare designed to maintain user-specified atmospheric conditions, through temperature, humidity, airflow, and light cycling controls, for stability and shelf-life testing of pharmaceuticals, cosmetics, raw materials or food products.
Test Chamber Guidelines and Standards
产品稳定性测试指南由国际人类使用药品的技术要求协调委员会发布。ICH的指南定义了可接受的温度和湿度范围，偏离设定点，测试间隔的时间和均匀性。
稳定测试室建筑材料
Depending upon the intended use of the product, stability testing durations may range from several days to one year. As such, environmental test chambers are built with durable painted-steel exteriors and aseptic, rigid stainless steel interiors to handle the rigors of long-term testing.
Testing Chamber Airflow
To ensure optimal uniformity across the testing area, environmental testing chambers are designed with horizontal laminar airflow systems that include a positive-pressure feed plenum on one side of the chamber and a negative-pressure return plenum on the opposite side.
Read More:Environmental Test Chambers 101
A - Environmental Test Chamber Application
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Environmental test chambers专为四个主要应用而设计：湿度室，气候测试室，光稳定性室和生长室。湿度室旨在控制从环境到最常见的70°C，湿度从10％到98％RH的温度。
湿度test chambersinclude cooling coils to reduce the internal temperature down to refrigerated levels (4°C). Climate test chambers offer a broader temperature range than humidity test chambers, normally -40°C to 180°C, to simulate extreme environmental conditions.
Photostability chambersinclude UV and fluorescent lights to expose pharmaceutical or cosmetic samples to differing lumen dosages.
Plant Growth chamberscontrol temperature and humidity to simulate optimal growth conditions for plant organisms, like Arabidopsis, or seed germination studies.
B-最高测试室温度
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Standard environmental test chambersmaintain temperatures from ambient to 70°C, though certain models utilize cooling coils to reduce temperatures down to 4°C.
生长室are designed to simulate optimal germination conditions for seeds and plant organisms and, thus, cannot maintain temperatures above 50°C.
Climate testing chambersoffer the broadest temperature range in the industry, commonly -40°C to 180°C.
C - Environmental Test Chamber Size and Capacity
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Environmental test chambers are manufactured to a standard range of sizes based on sample storage capacity.
紧凑的低通量模型provide 2 cubic feet or 4 cubic feet of storage space, whereas high-throughput, free-standing units provide up to 29 cubic feet of storage space.
Standard test chambers包括安装在钢架上的可调节架子，以最大程度地利用内部腔室内样品存储容量。
鉴于内部腔室空间外部的侧面安装室，测试室的工作占地面积明显大于存储容量。
D - Environmental Test Chamber Voltage
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120-volt connections are suitable for standard laboratory power outlets in the United States.
与旨在在120伏的设备相比，在欧洲大陆常见的240伏连接所需的电流（安培数）和较小的导体所需的速度更少。
专业高压设备需要480伏连接，并提供防止电气危险的额外保护。
E-环境室内材料
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Stainless steel is compatible with alcohol-based cleaners, resists corrosion, and promotes aseptic conditions. Powder-coated steel represents an economical alternative to stainless steel but may chip after prolonged exposure to bleach-based disinfectants.
F-特殊环境测试室功能
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F1 - Refrigerated Environmental Test Chambers ion
冷藏温度测试室维护down to 4°C for shelf-life testing or stability testing of pharmaceuticals. Refrigerated models can also serve as short-term storage spaces for temperature-sensitive food products and raw materials.
F2 - Humidity Control Test Chambers
湿度test chambers maintain RH levels from 10% to 98% per ICH guidelines. Visual and audible alarms activate if temperature or humidity conditions fall outside of the standard range.
F3-植物的昼夜循环室
Plant growth chambers contain fluorescent lighting for programmed daily light and dark (or day/night) cycles defined over a one-week period.
F4-触摸屏环境控制器
人体工程学触摸屏控制器包括时间分段，实时编程，数据记录和导出，系统诊断测试以及听觉/视觉警报。
F5 - Light Dose Control for Testing Chambers
Certain photostability chambers include light dosage control for UV-A and fluorescent, visible light per ICH guidelines.
Where Can I Buy Environmental Test Chambers Online?
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