Thermo Scientific
Forma Environmental Chambers
Controlled Temperature Storage Solutions
Optimum uniformity
plus a wide temperature range
A Choice of Environmental Chambers to Meet Your Specific Needs
From stability testing to cell culturing, CO2, RH, and refrigeration control to temperature-only, and 11.0 to 29.0 cu. ft., Thermo Scientific™ Forma™ environmental chambers are built to last and will meet your needs now and in the future.
If you require a high precision cabinet to meet ICH, FDA, TAPPI, ASTM or national testing standards our 3920/3940/3911 Series is the ideal choice.
•Uniformity and a wide temperature range
for easy compliance with regulatory requirements
•Rugged construction and durable shelving designed for long life
•Broad range of options to create the perfect fit for your applications
Consider our Thermo Scientific 3960 Reach-In Incubator/ Environmental Chamber if you are focused on elevated temperature-only segments of drug stability and culture.
•Optimum uniformity and an elevated temperature range for easy compliance with regulatory requirements
•Rugged construction and durable shelving for long life
•Valuable features designed for flexibility and cost-effectiveness
At-A-Glance Chamber Comparison
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Cat. No. |
Temp Range |
Uniformity |
RH |
(Cu. Ft.) |
CO2 |
Lights |
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3940 (3949) |
0°C TO 60°C |
±0.3°C @ 25°C to 37°C |
Above ambient to 95% @ 37°C |
29.0 |
Optional |
Optional* |
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3920 |
0°C TO 60°C |
±0.3°C @ 25°C to 37°C |
N/A |
29.0 |
Optional |
Optional* |
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Stability |
3911 (3913) |
0°C TO 60°C |
±0.3°C @ 25°C to 37°C |
Above ambient to 95% @ 37°C |
11.0 |
Optional |
N/A |
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5°C above |
±0.4°C @ 30°C |
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3960 (3961) |
±0.3°C @ 37°C |
N/A |
29.0 |
N/A |
N/A |
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ambient to 60°C |
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±0.5°C @ 45°C |
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*Lights (Cat. No. See page 11) do not meet ICH guidelines.
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Thermo Scientific 3920/3940/3911 Series Stability Chambers for a Multitude of Applications
This series of environmental chambers meets International Conference on Harmonization (ICH) guidelines* for drug substance and product storage testing. The units are ideal for drug stability studies, shelf life testing for packaged products, and insect and other large-scale biological research.
Optimum uniformity and a wide temperature range for easy compliance with regulatory requirements
These chambers feature a 0°C to 60°C (32°F to 140°F) temperature range that can be set in 0.1°C increments. The broad temperature range, and optimum temperature uniformity and recovery contribute to an ideal test environment, even when the chamber contains large product loads and low output,
heat-generating equipment.
Advantages of our directed horizontal laminar airflow system
Our directed airflow system (shown below) promotes an ideal growth environment. The enhanced design includes a positive pressure feed plenum on the right
side of the chamber and a negative pressure return plenum on the left to distribute the airflow uniformly throughout the chamber.
This combination directs air across the surface of each solid shelf. Even when filled with samples or equipment, each shelf receives a consistent flow of conditioned air for optimum temperature uniformity and recovery.
As opposed to our horizontal airflow system, top-to- bottom (non-directed) airflow systems use a topmounted fan to push air down through wire shelves.
Temperature uniformity and recovery can deteriorate quickly when shelves are filled because air movement is blocked. That variation in temperature, alone or when combined with frequent door openings, may compromise environmental conditions or make process validation difficult.
Standard 4 to 20 milliamp output connects to most alarm/monitoring systems, allowing you to meet internal and regulatory product documentation requirements. Chart recorders are also available.
The Thermo Scientific directed airflow design (left) versus a top-to-bottom, undirected airflow design (right).
The directed airflow minimizes the risk of product desiccation and loss, and wasted time and money due to poor temperature uniformity and recovery.
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Main Power Switch
and Indicator
Humidity Controller (3940/3949, 3911/3913) only)
Displays actual RH (%) and setpoint (Ramp and Soak)
Humidity Alarm and Indicator (3940/3949, 3911/3913 only)
Indicates deviation of cabinet humidity from set parameters
Temperature Controller
Displays actual chamber temperature and setpoint (Ramp and Soak)
Over-temperature Safety Thermostat and Indicator
Set over-temp (alarm and light indicate over-temp condition)
Under-temperature Safety Thermostat and Indicator
Set under-temp control (alarm and light indicate under-temp condition)
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Dehumidify and Humidify Switches and Indicators |
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Defrost and Refrigeration Switches and Indicators |
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(3940/3949, 3911/3913 only) |
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Adjustable defrost timer is factory set for two 15 minute |
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Control humidification and refrigeration systems, show cycle status |
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defrost cycles during a 24 hour period |
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(dehumidify switch operates only with optional heatless dryer) |
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Rugged construction and durable shelving for long life
•Exterior cabinet is 18 gauge cold-rolled steel, powder coated for durability and a high quality appearance that resists scratches and chipping.
•2.0" (5.1cm) thick, non-CFC, foamed-in-place polyurethane cabinet insulation provides maximum product thermal protection and increased rigidity for reliable daily use.
•Phenolic-coated evaporator protects against corrosive by-products or agents in the chamber atmosphere (e.g., secretions from insects such as flies), ensuring long life.
•Solid, stainless steel interior is more durable and corrosion-resistant than plastic or painted metal, ensuring long life and minimizing equipment costs.
•Heavy-duty, solid, stainless steel shelves are easy-to- clean, saving time and effort; more corrosion-resistant than coated wire shelves for long life; and adjustable for convenience.
•29.0 cu. ft. models include 6 shelves that are adjustable on 3.0" (7.6cm) centers.
•11.0 cu. ft. model includes 3 shelves that are adjustable on 2.0" (5.1cm) centers.
•Reinforced floor/shelf components for 29.0 cu. ft. models are available so you can use shakers, cell rollers, or other heavy equipment or product loads inside the chamber to meet a variety of applications.
•Swivel, locking casters ensure easy mobility during installation and cleaning. Leveling feet provide stability and added safety in the lab.
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Broad range of options create a perfect fit for your applications
Many options are available so you can tailor this series to your specific applications.
Factory-installed options (ordered separately) include:
•Choice of access ports for inserting data logging sensors or cables.
•Convenience receptacles to run electrical devices in chamber.
•Choice of chart recorders for data logging.
•Choice of data outputs for monitoring/alarm (3960 / 3961 models only).
•Infrared CO2 Control Package for control of a CO2 environment.
•Heatless dryer for low humidity conditions – check temperature / humidity chart (see page 5).
•Door light package for plant growth, seed germination, algae, small animal, insect studies.
•Stainless steel door glass for light sensitive applications.
•Door options include door lock, left-hand door, and Lexan™ inner door.
•Choice of shaker support systems provides system safety.
•Temperature mapping and calibration certificate – customized.
Accessories/on-site options (ordered separately) include:
•Extra and special shelving.
•Reinforced floor options for heavy weights – up to 150 lb.
•Sensaphone™ telephone dialing systems – interfaces with standard touch-tone phone.
•Cell roll system for production of monolayer cell cultures (see page 7).
•On site IQ/OQ/PQ validation services.
Options for the humidity system:
•Condensate pump kit: recommended when the accessible drain on lab wall is well above the drain on back of environmental chamber.
•Condensate evaporator: external heating device which burns off water that drips out the back of the unit when there is no drain available.
See page 11 for order numbers, model compatibility and additional information.
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