Thermo Scientific Forma 3940 Environmental Chamber – Government Lab Enterprises
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Thermo Scientific Forma 3940 Environmental Chamber

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  • Regular price $9,500.00
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Thermo Scientific 3940 Forma Environmental Chamber

Manufacturer:  Thermo Scientific

Model:  3940

Condition:  Excellent

Warranty:  30 day

Status: Pre-owned 

Estimated lead time:  5 days typically

Perform a variety of applications with Thermo 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.

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
  • 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

Durable Construction:

  • Cold-rolled steel, powder-coated cabinet
  • 2 in. (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


  • Thermo 3940 environmental chamber
  • (5) shelves
  • Operations manual (pdf copy)
  • Power cord
  • 30 day warranty



 29 cu. ft.     (821L)

 Exterior Dimensions: (HxWxD) 

 88.5 in. x 38 in. x 32 in.

 Interior Dimensions (HxWxD)

 60 in. x 31 in. x 27 in.

 Cabinet Material

 Cold-rolled steel, powder-coated cabinet


 5 supplied; 19 max.


 Digital dual LED


 Temperature ramp and soak, up to 24 steps

 Relative Humidity  Above ambient to 95% @ 37°C

 Temperature Range 

 0C to 60C

 Temperature Resolution


 Temperature Uniformity

 +/-0.3 at 25 to 37C

 Temperature Sensor


 Temperature Accuracy

 +/-0.1 at 25 to 37C


 1/4hp, air-cooled

 Heat Output

 1600W (5500BTUH) 


 Interior Lighting


 Adjustable defrost timer; factory set for two 15-min. defrost cycles/24 hr.


 CFC-free, R134A



 Electrical Requirements