Learn More: Forma Environmental Chambers
Horizontal Laminar Airflow System Assures Temperature Uniformity
Thermo Scientific's Forma Environmental Chambers feature a directed airflow system designed to optimize temperature uniformity compared to a conventional top-down airflow system. By directing airflow across the surface of each shelf, samples receive a consistent flow of conditioned air that improves testing accuracy, especially following the door-opening and recovery events. Using positive feed plenums on one side of the chamber and negative pressure return plenums on the opposite side, the horizontal laminar flow system prevents airflow obstruction due to large volumes of samples and their arrangement on the shelves.Customizable to Fit Any Industrial, Pharmaceutical or Biotechnological Application
The Thermo Scientific Forma Series Environmental Chamber offers a wide range of options including condensate evaporators, heatless dryer systems, custom access ports, and additional electrical outlets. Factory-installed shaker support and integrated cell roller systems are also available as custom orders.
Conventional top-to-bottom undirected airflow design
Forma horizontal directed airflow design minimizes product loss and desiccation
| Model Number | 3911 | 3920 | 3940 |
|---|---|---|---|
| Exterior Dimensions | 38"W x 32"D x 51.5"H (965 x 813 x 1308 mm) | 38"W x 32"D x 88.5"H (965 x 813 x 2248 mm) | 38"W x 32"D x 88.5"H (965 x 813 x 2248 mm) |
| Interior Dimensions | 31"W x 27"D x 24"H (787 x 686 x 609 mm) | 31"W x 27"D x 60"H (787 x 686 x 1524 mm) | 31"W x 27"D x 60"H (787 x 686 x 1524 mm) |
| Volume | 11 cu. ft. (312 liters) | 29 cu. ft. (823 liters) | 29 cu. ft. (823 liters) |
| Temperature Control | ±0.1°C @ +37°C (98.6°F) | ±0.2°C @ +25°C (77°F) | ±0.1°C @ +37°C (98.6°F) |
| Standard # of Shelves | 3 | 6 | 6 |
| Maximum # of Shelves | 11 | 19 | 19 |
| Humidity Control | ±5% RH | None | ±5% RH |
| Humidity Range | Above ambient to 95% | None | Above ambient to 95% |
| Electrical | 208-220V | 120V | 208-220V |
| Plug Type | 10' NEMA 14-20 | 8' NEMA 5-20 | 10' NEMA 14-20 |
| Fill Port | 1/8" FPT | None | 1/8" FPT |
| Drain Port | 3/8" (19 mm) FPT | None | 3/8" (19 mm) FPT |
| Temperature Range | 0°C to +60°C (32°F to +140°F) | ||
| Temperature Uniformity | ±0.3°C at 25°C to 37°C with six shelves installed* | ||
| Shelf Surface Area | 5.4 sq. ft. (0.5 m2) | ||
| Shelf Loading Capacity | 35 lbs. (16 kg) slide in and out 50 lbs. (23 kg) stationary | ||
| Interior Material | 304 2B Stainless Steel | ||
| Exterior Material | Cold-rolled steel | ||
| Insulation | 2" (51 mm) foamed urethane | ||
| Finish | Powder coated | ||
| Refrigeration Compressor | 1/4 Horsepower, air cooled | ||
| Refrigerants | Non-CFC R-134a | ||
| * Better than ±0.5°C uniformity at all other temperature parameters. | |||
