Maximum volume for high-throughput requirements.

Product Selection

Model CO2 Sensor Technology Capacity Electrical
3950 TC Sensor 29 cu. ft., 66L 120V 60Hz
3951 TC Sensor 29 cu. ft., 66L 200/230V 50/60Hz


  • Culture large volumes of patient samples for bacterial growth, perform short-term growth studies and work with large volume products.
  • The Thermo Scientific Large-Capacity Reach-In CO2 Incubator offers a broad range of built-in features that provide optimal flexibility.
  • This unit provides elevated RH to prevent product desiccation in medium-term cultures and maintains temperature uniformity, even when equipment (cell rollers, rockers, shakers, spinners, stirrers) is installed in the chamber.

Direct Heat Chamber

  • Larger 821L (29 cu. ft.) capacity easily accommodates shakers, stirrers, roller bottles, and other related equipment for high throughput applications.
  • Direct horizontal laminar airflow system is designed to promote the ideal growth environment.
  • Heated triple-pane glass door minimizes condensation and permits a clear view.
  • Two thru-wall access ports (on right and left sidewalls) allow addition of probes, sensors, and power cords.
  • Polished stainless steel interior and heavy-duty, solid stainless steel shelves are easy- to-clean and corrosion resistant.
  • Interior and exterior accessory receptacles provide a convenient power source.
  • Swivel locking casters ensure easy mobility for installation and cleaning.

In situ Sensors and Probes Designed for Precise Monitoring

  • TC (thermal conductivity) CO2 sensor for long, reliable operation.
  • Dual temperature probes with over temperature protection.

Flexible, Easy-to-Use rH system

  • 3 rH system settings: off, medium, high.
  • 3 water fill options: automatic, semi-automatic, ergonomic manual.

Enviro-Scan Microprocessor Control

  • Easy-to-use, alphanumeric LED display.
  • Flexible, intuitive controls with message center including process and alarm status messages.
  • Configurable audible on/off, access code, tracking low and high alarms.


Thermo Scientific Large-Capacity Reach-In CO2 Incubators Product Brochure