Thermo Scientific 3928 Forma Vertical Light Chamber 29-cu ft | 821L

  • 120 volts, 60 hertz — Brand-New + Direct / Drop Shipping¹ + Includes Warranty = from Thermo Scientific



  • Solid door comes standard.
  • Flexible set up of light modules addresses requirements for sample distance to light and sample volume.
  • Address applications under optimal conditions with light choices. Wide light distribution is achieved with 7 light bulbs.
  • Three different light modules are available to address specific applications:
  • ICH stability testing - addressing light and UV exposure according to guideline Q1B.
  • Plant growth - addressing high red/blue radiation for optimal growth conditions.
  • Animal hatching - providing daylight simulation.

Program light cycles:

  • Day/Night or Individual on/off cycles for every day of the week.
  • Dawn/dusk simulations with increasing light intensity in 3 steps.


Product Size Each
Capacity (Metric) Shelf 15.9 kg slide out / 22.7 kg stationary
Capacity (English) 29 cu.ft.
Capacity (English) Shelf 35 lbs slide out / 50 lbs stationary
Alarm Types Temperature, adjustable
Certifications/Compliance cULus
Controller Type PID microprocessor controls
Description Large reach in chamber with vertical light – heating & cooling, no humidity control
Capacity (Metric) 821 L
Chamber Material Stainless Steel, Type 304 /1.4301 , 2B Finish
Dimensions (D x W x H) Interior 787 x 686 x 1524 mm / 31 x 27 x 60 in.
Dimensions (L x W x H) 965 x 2248 x 1308 mm / 38 x 32 x 88.5 in.
Temperature Range (Metric) 0°C to 60°C with light off / 10°C to 50°C with light on
Material Cold-rolled steel, powder-coated cabinet
Display Digital Dual LED
Door Style Solid door
Electrical Requirements 120V, 60Hz, 16.0 A, 3 Wire (incl. Ground) single phase
For Use With (Application) Light stability testing, Plant growth, Animal hatching
Lighting Light modules with 7 fluorescent bulbs, please order separately (max. 3 modules per chamber)
No. of Shelves 3 delivered / max. 19 (3 with light)
Plug Type Nema 5-20P
Ports Inner diameter: 54 mm / 2.3 in.
Refrigerant CFC-free, R134A
Shelf Area (English) 30.62 x 25.81 in.
Shelf Area (Metric) 778 x 656 mm
Shipping Weight (Metric) 386 kg
Shipping Weight (English) 850 lbs
Temperature Control Microprocessor, PID
Temperature Resolution 0.1°C
Temperature Sensor Pt 100
Temperature Stability =±0.1°C with light off / =±0.5°C – with light on, @ 20°C to 37°C @ 75% RH with 2 light modules
Temperature Uniformity =±0.3°C with light off / =±3.0°C – with light on, @ 20°C to 37°C @ 75% RH with 2 light modules
Warranty 2 years parts / labor
Weight (English) 700 lbs
Weight (Metric) 318 kg
Compressor 1/4hp, air-cooled
Defrost Adjustable defrost timer; factory set for two 15-min. defrost cycles/24 hr.


Model Capacity Alarm Types Electrical
3909 11 cu. ft., 311L Temperature and Humidity, adjustable 208-220V 60Hz
3928 29 cu. ft., 821L Temperature, adjustable 120V 60Hz
3942 29 cu. ft., 821L Temperature and Humidity, adjustable 208-220V 60Hz


Thermo Scientific Forma Vertical Light Chambers Product Brochure

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