Broad Range of Features and Controls: 

• Wide temperature range of 0° to 60°C that enhances the flexibility of the unit 
• Relative humidity control via steam generator from above ambient to 95% at 37°C (not available w/Cat. No. 3920) 
• Sophisticated digital controls 
• Programmable ramp and soak cycles for temperature and RH† 
• Durable cabinets with true laminar airflow through side plenums for extremely tight uniformity 
• Phenolic-coated evaporator for use in applications that create corrosive byproducts 
• Manual control of defrost and refrigeration cycles 
• Visible/audible safety alarms alert to over- and undertemperature conditions, deviation of humidity from set parameters (except Model 3920) 

Durable Construction: 

• Cold-rolled steel, powder-coated cabinet 
• 2″ (5.1cm) thick, CFC-free, foamed-in-place polyurethane insulation 
• Stainless-steel interior with solid stainless-steel adjustable shelves 
• Directed horizontal airflow system for excellent uniformity 
• Locking swivel casters for easy mobility during installation and cleaning 
• Leveling feet for stability and added safety in the lab 

Broad Range of Options: 

• Interior lighting for Models 3920, 3940 and 3949 (Optional) 
• Reinforced shelving and flooring for heavy loads 
• Heatless dryer for lower humidity levels 
• Access ports for probes, sensors 
• Interior convenience receptacles 
• CO2 (IR sensor) 
• 6″ and 12″ temperature chart recorder 
• Other custom options available 

Compatible with: 

• Recorders (197075, 198036, 198039, 198042, 201144, 201145, 201146, 201147) 
• Reach-In/Environmental Chamber Solid Stainless-steel Shelf (224139) 
• Reach-In/Environmental Chamber Perforated Stainless-steel Shelf (224155) 
• Reinforced Stainless-steel Shelf (224161) 
• Fixed Reinforced Stainless-steel Shelf for two shakers (1900005) 
• Stainless-steel Door Glass Cover, factory installed (190591) 

Recommended for:  Ideal for growth, stability and shelf-life testing applications 

Ordering Information  † Humidity controller available on 3940/3949, 3911/3913 only 

• See more at: http://www.thermoscientific.com/en/product/forma-environmental-chambers.html#sthash.2eZgTAij.dpuf