Thermo Scientific 3961 Forma Environmental Chamber 29-cu ft | 821.2L


Switch & Pay via Wire Transfer? Enjoy 3.5% Off

  • 200 to 230 volts, 50/60 hertz — Brand-New from Thermo Scientific + Ready to Ship² from our Cross-Dock Location


  • Perform many clinical applications, including elevated temperature stability and shelf-life testing with Thermo Scientific Forma 3960 Series Environmental Chambers.
  • These chambers feature a horizontal laminar airflow system, stainless-steel interior and microprocessor controls for a high-performance, high-capacity unit.


  • True laminar airflow through side plenums for extremely tight temperature uniformity.
  • Sophisticated microprocessor controls for constant display of temperature.
  • Alphanumeric message center for ease of setup and programming.
  • Access ports, locking casters and alarm contacts.
  • Capacity: 29 cu. ft. (821.2L) for high volumes and a broad range of products.
  • Operating temperature range: 5°C above ambient to 60°C (140°F).

Airflow System:

  • Directed airflow system promotes an ideal growth environment.
  • Positive pressure feed plenum and negative pressure return plenum direct air across surface of each solid shelf.
  • Feed plenum cannot be blocked by chamber contents.

Intuitive, Powerful Enviro-Scan Control:

  • Unit offers precise control without complicated programming.
  • Operating modes include Run, Setpoint, Calibration and System Configuration.
  • Easy-to-read display offers convenient, continuous monitoring.
  • Audible/visual under- and over-temperature alarms offer peace of mind.
  • Data outputs allow connection to in-house monitor/alarm system to track chamber conditions.

Durable Construction:

  • Exterior cabinet: 18-gauge. cold-rolled steel, powder coated for durability; resists scratches and chipping.
  • Heated glass door for minimal condensation and a clear view.
  • 2" (5.1cm) thick fiberglass cabinet insulation for maximum product thermal protection.
  • Solid, stainless-steel interior for long life and minimized equipment costs.
  • Five heavy-duty, solid stainless-steel shelves, adjustable on 2" (5.1cm) centers.
  • Swivel locking casters for easy mobility.
  • Leveling feet provide stability and added safety.
  • Thru-wall access ports on right and left chamber sides for probes, sensors, etc.
  • Interior GFCI duplex receptacle on 115V Model (single European 230V CEE 7 on 230V Model) for shakers, cell rollers, and other equipment.
  • Exterior receptacle on upper-right side of control panel for connecting optional recorder or other equipment.

Ordering Information:

  • Reinforced floor/shelf components are available for shakers, cell rollers, or other heavy equipment or product loads inside chamber.
  • Units also available with chart recorders.


Product Size Each
Capacity (English) 29 cu. ft.
Capacity (Metric) 821.2L
Voltage 200 to 230V
Hertz 50/60Hz
Door Style Heated, triple pane, tempered glass exterior
Height (English) Exterior 80 in.
Length (English) Exterior 33 in.
Width (English) Exterior 38 in.
Height (Metric) Exterior 203.2cm
Length (Metric) Exterior 83.8cm
Width (Metric) Exterior 78.7cm
Height (English) Interior 60 in.
Width (English) Interior 31 in.
Depth (English) Interior 27 in.
Height (Metric) Interior 152.4
Width (Metric) Interior 78.7cm
Depth (Metric) Interior 68.8cm
Chamber Material Type 304, 2B finish, stainless steel
Cabinet Material Cold-rolled steel, powder coated
Amperage 5A
Wattage 150w
Net Weight (English) 500 lb.
Net Weight (Metric) 226.8kg
Shipping Weight (English) 660 lb.
Shipping Weight (Metric) 299.4kg
Shelves 5 supplied, 26 max.
Length (English) Shelf 25.8 in.
Width (English) Shelf 30.6 in.
Length (Metric) Shelf 65.5cm
Width (Metric) Shelf 77.7cm
Capacity (English) Shelf 30 lb.
Capacity (Metric) Shelf 13.6kg
Temperature Range (Metric) 5°C above ambient to 60°C
Temperature Control Enviro-Scan Microprocessor
Temperature Sensitivity ±0.1°C
Temperature Uniformity ±0.4° at 30°C (86°F); ±0.3° at 37°C (98.6°F); ±0.5° at 45°C (113°F)
Temperature Sensor Precision thermistor (over temperature and control); independent thermostat (over temperature safety)
Ports Two 2.4 in. (6.1cm) I.D., one on each side
Insulation 2 in. (5.1cm) fiberglass
Certifications/Compliance UL listed, CE marked
Dimensions (L x W x H) Exterior 33 x 38 x 80 in. (83.8 x 78.7 x 203.2cm)
Electrical Requirements 200 to 230V 50/60Hz


Model Capacity Electrical
3960 29 cu. ft., 821.2L 115V 50/60Hz
3961 29 cu. ft., 821.2L 200/230V 50/60Hz



Thermo Scientific Forma 3960 Series Environmental Chambers Product Brochure

You may also like…