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Terra Part #PriceShips in
120General ProtocolFree StandingPowder Coated Steel29Ambient to 60°CStainless SteelForma3920 5321-32 50158 $16,28910-20 Days2
208General ProtocolFree StandingPowder Coated Steel11Ambient to 60°CStainless SteelForma3911 5321-30 50156 $19,39210-20 Days3
208General ProtocolFree StandingPowder Coated Steel29Ambient to 60°CStainless SteelForma3940 5321-33 50159 $21,0345-7 Days4
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Product Details
  • Forma Environmental Test Chambers by Thermo Fisher Scientific are ideal for drug stability studies, shelf-life testing for packaged products, and large scale biological research
  • High precision chambers meet ICH, FDA, TAPPI, and ASTM testing standards
  • Directed horizontal laminar flow system improves temperature uniformity, even with frequent door openings
  • CFC-free foamed-in-place polyurethane insulation
  • Phenolic coating prevents corrosive damage from by-products released into the chamber's atmosphere
  • 2 inches of foamed-in-place polyurethane insulation provide excellent thermal stability
  • Powder coated, 18-gauge cold-rolled steel exterior and solid stainless steel interior
  • Standard outputs allow integration with existing alarm/monitoring systems
  • Swivel, locking casters simplify installation or relocation of chambers for cleaning
  • Leveling feet stabilize the chamber for safety
  • Customizable chambers with dehumidification and CO2 controllers

  • Environmental/Humidity Chamber; 11 cu ft, 0C - 60C, Benchtop, Forma Forma Environmental Chambers by Thermo Fisher Scientific – 11.0 cu. ft.
  • Environmental Chamber; 29 cu ft., 0C - 60C, Forma Forma Environmental Chambers by Thermo Fisher Scientific – 29.0 cu. ft.
Features & Benefits

Features & Benefits

Benefits of Laminar Airflow

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.
Forma Environmental Chamber Airflow Diagram
Conventional top-to-bottom undirected airflow design
Forma Enviornmental Chamber Airflow Uniformity
Forma horizontal directed airflow design minimizes product loss and desiccation
Model Number391139203940
Exterior Dimensions38"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 Dimensions31"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)
Volume11 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 Shelves366
Maximum # of Shelves111919
Humidity Control±5% RHNone±5% RH
Humidity RangeAbove ambient to 95%NoneAbove ambient to 95%
Plug Type10' NEMA 14-208' NEMA 5-2010' NEMA 14-20
Fill Port1/8" FPTNone1/8" FPT
Drain Port3/8" (19 mm) FPTNone3/8" (19 mm) FPT
Temperature Range0°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 Area5.4 sq. ft. (0.5 m2)
Shelf Loading Capacity35 lbs. (16 kg) slide in and out 
50 lbs. (23 kg) stationary
Interior Material304 2B Stainless Steel
Exterior MaterialCold-rolled steel
Insulation2" (51 mm) foamed urethane
FinishPowder coated
Refrigeration Compressor1/4 Horsepower, air cooled
RefrigerantsNon-CFC R-134a
* Better than ±0.5°C uniformity at all other temperature parameters.
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