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Thermo Scientific Midi 40 CO2 Incubator - TC Sensor

Part Number: 3403

Model 3403, Thermo Scientific Midi 40 CO2 Incubator - TC Sensor

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List Price



-$840.00 (15.5%)  


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Total Price   


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Part Number  



4 Shelves

Temp Range  

Ambient + 5°C to 60°C (Ambient at 25°C)

Chamber Volume  

1.4 Cubic Feet / 39.6 Liters


Natural Air

Temp Uniformity  

±0.4°C at 37°C

Temp Accuracy  

±0.1°C at 37°C

Chamber Dimensions  

14"H x 14"W x 12"D

Ext Dimensions  

18"H x 23.5"W x 18.5"D

Ship Weight  

70 lbs


120V 50/60Hz


1 Year Parts and Labor

(PDF Download) Midi 40 Incubator Brochure

Precision Midi 40 CO2 Laboratory Incubator

The Thermo Scientific Midi 40 CO2 incubator is designed specifically for cell culture scientists who require a compact culturing workspace to handle small workloads, perform personal use applications, or simply address limited space environments.

The Midi 40 delivers the performance and capabilities of full-sized incubators in a space-saving footprint, ideal for those who wish to avoid shared-use environments that can present potential contamination risk through unnecessary sample handling and repeated door openings.

Midi 40 with Door Open

Advanced microprocessor: bright digital display and intuitive touchpad for simplified entry of temperature, CO2 and alarm data, with keyed setpoint switch to prevent unauthorized changes to your operating parameters.

High and Low alarms can be set to make certain correct temperatures are maintained

Exterior is 18 gauge, cold rolled steel with a high impact painted finish

Stainless steel culture chamber: seamless, non-corrosive, type 304, mirror finish...and exceptionally easy to clean

Provided with four stainless steel, perforated shelves (removable)

Highly efficient direct heating design: provides even heat distribution to all sides of the chamber, for accurate control and uniformity.

Precise and reliable CO2 control: featuring accurate thermal conductivity sensor located directly in the chamber, ensuring responsive control and long service life.

Removable water reservoir: generates relative humidity values up to 95% with rapid recovery rates that promote optimal cell growth.

Tempered inner glass door: provides sample security while preventing unwanted condensation.

Convenient data communication: RS-485 signal output is standard, in addition to audible and visual alarm functions to ensure proper operations.

CO2 Capabilities and Features

Range of 0-20%

Control accuracy: ± 0.1%

Sensor: Long Life Thermal Conductivity (TC) Sensor

Uniformity: 0.10%

Inlet pressure required: 15 PSIG (1.0 bar), 99.5 medical grade CO2

Inlet air filtration: 0.3 micron antimicrobial filter

Minimizes Culture Disturbance

As a single-user alternative, the Midi 40 eliminates the need for shared-use culturing and the impact on your samples from multiple user access and frequent door openings.

Prevents Cross Contamination

The Midi 40 makes it cost-effective to dedicate incubator space to specific cell lines and individual research studies, when separation of samples and culture types is essential.

Conserves Bench Top Space

Small and economical, add culturing capacity to crowded labs or reduce operational costs with an incubator that is properly sized for your small throughput needs, capable of storing up to 35 T75 culture flasks

Midi 40 Control


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