Thermo Scientific™

Forma™ Environmental Chamber Model 3940, 821.2 L, Stainless Steel

Catalog number: 3940
Thermo Scientific™

Forma™ Environmental Chamber Model 3940, 821.2 L, Stainless Steel

Catalog number: 3940
Perform a variety of applications withThermo Scientific™ Forma™ environmental chambers, which can be configured for a variety of purposes and are available in multiple capacities. With a wide range of accessories and years of experience in constructing cabinets, we can construct units to match your most stringent applications.
 
Catalog Number
3940
Unit Size
Each
Price (USD)
Full specifications
Capacity (English)29 cu. ft.
Certifications/ComplianceICH, FDA, TAPPI, ASTM™
Capacity (Metric)821.2 L
Chamber MaterialStainless Steel
CO2 Sensor TechnologyIR Sensor
LightingNo Lighting
MaterialPowder-coated Cold Rolled Steel
No. of Shelves6 supplied/19 max.
Relative Humidity95%
Temperature Range (Metric)0°C to 60°C
TypeEnvironmental Chamber
DisplayDigital Dual LED
Humidity Accuracy±5.0%
Humidity ControlMicroprocessor, PID
Humidity DisplayDigital, dual LED (direct set and read in % RH)
Humidity Resolution0.01
Humidity SensorBulk polymer
Humidity SourceSteam generator; initial fill approx. 1 qt. (1L)
Input Water PressureWater Inlet Gravity to 40psi
ProgrammabilityTemperature ramp and soak, up to 24 steps
RefrigerantCFC-free, R134A
Temperature Accuracy±0.1 at 25° to 37°C
Temperature Resolution0.1°C
Temperature SensorRTD
Temperature Uniformity±0.3 at 25° to 37°C
Water Consumption0.25 gal./hr. input water volume
Water Resistivity50kilohm to 1megohm resistance
Dimensions (D x W x H) Interior27 x 31 x 60 in. (68.6 x 78.7 x 152.4 cm)
Width (English)38 in.
Width (English) Interior31 in.
Width (Metric)96.5 cm
Width (Metric) Interior78.7 cm
Height (English)88.5 in.
Height (English) Interior60 in.
Height (Metric)224.8 cm
Height (Metric) Interior152.4 cm
Depth (English)32 in.
Depth (English) Interior27 in.
Depth (Metric)81.3 cm
Depth (Metric) Interior68.6 cm
Electrical Requirements208/220 V, 60 Hz
Voltage208/220 V
Amperage15 A
Frequency60 Hz
Unit SizeEach
Showing 1 of 1
Catalog NumberSpecificationsUnit SizePrice (USD)
3940Full specifications
EachRequest A Quote
Capacity (English)29 cu. ft.
Certifications/ComplianceICH, FDA, TAPPI, ASTM™
Capacity (Metric)821.2 L
Chamber MaterialStainless Steel
CO2 Sensor TechnologyIR Sensor
LightingNo Lighting
MaterialPowder-coated Cold Rolled Steel
No. of Shelves6 supplied/19 max.
Relative Humidity95%
Temperature Range (Metric)0°C to 60°C
TypeEnvironmental Chamber
DisplayDigital Dual LED
Humidity Accuracy±5.0%
Humidity ControlMicroprocessor, PID
Humidity DisplayDigital, dual LED (direct set and read in % RH)
Humidity Resolution0.01
Humidity SensorBulk polymer
Humidity SourceSteam generator; initial fill approx. 1 qt. (1L)
Input Water PressureWater Inlet Gravity to 40psi
ProgrammabilityTemperature ramp and soak, up to 24 steps
RefrigerantCFC-free, R134A
Temperature Accuracy±0.1 at 25° to 37°C
Temperature Resolution0.1°C
Temperature SensorRTD
Temperature Uniformity±0.3 at 25° to 37°C
Water Consumption0.25 gal./hr. input water volume
Water Resistivity50kilohm to 1megohm resistance
Dimensions (D x W x H) Interior27 x 31 x 60 in. (68.6 x 78.7 x 152.4 cm)
Width (English)38 in.
Width (English) Interior31 in.
Width (Metric)96.5 cm
Width (Metric) Interior78.7 cm
Height (English)88.5 in.
Height (English) Interior60 in.
Height (Metric)224.8 cm
Height (Metric) Interior152.4 cm
Depth (English)32 in.
Depth (English) Interior27 in.
Depth (Metric)81.3 cm
Depth (Metric) Interior68.6 cm
Electrical Requirements208/220 V, 60 Hz
Voltage208/220 V
Amperage15 A
Frequency60 Hz
Unit SizeEach
Showing 1 of 1

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