Broad Range of Features and Controls:Wide temperature range of 0° to 60°C that enhances the flexibility of the unitRelative humidity control via steam generator from above ambient to 95% at 37°C (not available w/Cat. No. 3920)Sophisticated digital controlsProgrammable ramp and soak cycles for temperature and RH?Durable cabinets with true laminar airflow through side plenums for extremely tight uniformityPhenolic-coated evaporator for use in applications that create corrosive byproductsManual control of defrost and refrigeration cyclesVisible/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 cabinet2″ (5.1cm) thick, CFC-free, foamed-in-place polyurethane insulationStainless-steel interior with solid stainless-steel adjustable shelvesDirected horizontal airflow system for excellent uniformityLocking swivel casters for easy mobility during installation and cleaningLeveling 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 loadsHeatless dryer for lower humidity levelsAccess ports for probes, sensorsInterior convenience receptaclesCO2 (IR sensor)6″ and 12″ temperature chart recorderOther custom options availableCompatible 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 applicationsOrdering Information? Humidity controller available on 3940/3949, 3911/3913 only