The carbon dioxide incubator is designed to simulate the natural environment of cells and ensure that the conditions are constant. Although there are different types of incubators, most are designed to control CO2, relative humidity, temperature and pH at constant levels. New high-speed carbon dioxide sensors have now emerged, allowing designers to respond and manage gas concentrations in near real time as never before.

What is a incubator?

Microbial incubator is essentially a temperature controllable oven, which works in a strict biological range and is mainly used to cultivate and store microbial cultures. These incubators can be found in laboratories all over the world and are essential equipment. Both medical and biological laboratories use incubators to provide the right controlled environment for successful culture.

Why measure carbon dioxide?

The culture in the incubator requires very special environmental conditions. In general, the incubator allows the user to monitor and adjust different conditions, such as temperature, relative humidity and carbon dioxide level, so as to control the pH value of the medium and ensure and maintain the optimal growth or storage conditions.

Cell growth is controlled by controlling pH, which is usually between 7.0 and 7.7. The chemical reaction in the medium can change the pH value. To counter these reactions, controlling CO2 levels helps to maintain a stable pH balance of the growth medium.

If there is not enough CO2 in the atmosphere, the cell medium will release carbon dioxide, so the material will become alkaline. Too high carbon dioxide concentration will cause more carbon dioxide gas to be absorbed by the mixture, resulting in partial acidity. Providing an environment in which carbon dioxide can be controlled helps to maintain the required carbon dioxide content in the growth medium and a stable pH value.

What are the requirements for carbon dioxide sensors?

The CO2 sensor used in the cell incubator shall have good responsiveness, accuracy and stability. There will always be some uncertain changes in the incubator, which may have a negative impact on the culture. Therefore, it is very important to understand when and to what extent the CO2 concentration changes and be able to respond accordingly. Due to the high humidity environment, methods also need to be taken to mitigate the impact of high humidity levels, especially in the disinfection process, condensation on the sensor will lead to inaccurate results reported by the sensor. With a fast carbon dioxide sensor to detect the change of carbon dioxide gas level, the setting of the incubator can be adjusted almost in real time, thus reducing the chance of deviation from the standard of the incubator environment.

NDIR carbon dioxide sensor

Solid state ultra-low power LED light source is adopted. This type of light source has many advantages, especially in low-power applications. Carbon dioxide gas is strongly absorbed by mid infrared light of 4.25 microns. GSS manufactures its own LED, which is specially designed to emit 4.25um narrow band light.

GSS has designed a series of CO2 sensors with high speed and high response rate, which is specially designed for applications requiring near real-time measurement of CO2 concentration.

What are the requirements for NDIR carbon dioxide sensor to be used in incubator

Introduction to sprintir-6s and explorir-w

Sprintir-6s and explorir-w series sensors are a series of high-precision CO2 sensors designed to meet the needs of customers who need to quickly measure CO2 levels. The readings of sprintir-6s and explorir-w sensors are 20 and 2 times per second, respectively. The optical cavity of these two sensors is specially equipped with a flow adapter, so that the gas can flow through the sensor at high speed, and then the user can get high-speed measurement results.

Responsible editor: GT

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