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Unique carbon dioxide sensor CRIR series

As we all know, as human beings of carbon-based organisms, we are related to carbon dioxide all the time. Every time we breathe, we produce carbon dioxide. Every bottle of carbonated beverage we drink, the carbon dioxide that we put into the water and fish tank, the coal that we burn which produce carbon dioxide, the exhaust gas from the internal combustion engine of your car. And as a fire extinguisher, the agent material is lying there silently to protect you.


In life, do you often have such experience, in the big meeting room at 3 or 4 in the afternoon, a group of white-collar workers in a meeting are drowsy, you will feel irritated, depressed, and difficult to concentrate. Looking at the indoor air quality of the desktop, it shows that the CO2 value is 1200ppm. It is no wonder that many colleagues will feel heavy and the reaction becomes dull.

        Long-term concentrations of carbon dioxide will lead to a decline in intellectual IQ. When the concentration of carbon dioxide is between 3000ppm and 4000ppm, people will have deeper breathing, headache, tinnitus, and increased blood pressure. When the concentration is above 8000ppm, even death will occur.


In the industry, carbon dioxide sensor applications are more widespread. For example, wastewater treatment, safe production and other industries, especially in underground operations, need to monitor the concentration of carbon dioxide. In the animal husbandry, the air quality of the farms is related to the healthy growth of animals. There is also a carbon dioxide gas sensor used in agriculture. When the concentration of carbon dioxide is insufficient, it can remind the use of gas fertilizer to help vegetable growth and increase yield. In public places, carbon dioxide gas sensors can be installed for ventilation control and environmental quality monitoring.

As the chief culprit of greenhouse gases, a few days ago, the National Oceanic and Atmospheric Administration (NOAA) Mona Roya Meteorological Station's sensors monitored an astonishing amount of data. The concentration of carbon dioxide (CO2) in the atmosphere has exceeded 415 ppm, that is, the mass of carbon dioxide exceeds 41.5% of the total mass of the atmosphere, creating the highest ever record. This means climate change, El Niño is frequent, and more than 150 million Asians living in the sea level of about 1 meter will be displaced. Recently, the Amazon rain forest with 20% oxygen in the lungs of the Earth has been burning for more than three weeks, and there are many forest fires in Russia that cannot be extinguished by the rain. The earth has really entered the barbecue mode. This indicates that the Earth will heat up to more than 1.5 °C above the pre-industrial level. It will come before 2030 and the Earth will enter a destructive mode.


It seems that each of us really needs a little knowledge of carbon dioxide, and it maybe necessary to have a carbon dioxide sensor on everyone's desk or at home.

Now let our Banning Sensing senior technician to talk about this unique CRIR series carbon dioxide sensor.


First, the testing principle of the CRIR series of carbon dioxide sensors is different. Unlike the use of gas sensors or metal oxide semiconductor gas sensors, the CRIR series uses infrared technology, non-dispersive infrared (NDIR). The wavelength of the spectral source is 4.26 um, which is the CO2 absorption peak. When CO2 light is weakened, the concentration of CO2 is determined by detecting the light intensity. The CRIR series of carbon dioxide sensors can detect concentrations ranging from 400 ppm to 2000 ppm and up to 5000 ppm.


Secondly, thanks to the NDIR technology, the service life of the sensor is greatly extended, no need to replace sensitive components, simple installation and plug-and-play, which can reach a service life of 10 years. And its measurement accuracy can reach ± 40 ppm, ± 3% of the reading.

Finally, using the automatic baseline calibration ABC technology, the system is automatically calibrated once in a total of 180h (recorded once every 8h, less than 8 hours), the standard value is 400ppm, and it is automatically calibrated. If the standard of 400ppm is not reached for a long time, as long as there is a fresh air blowing for 12 minutes, it is immediately rated at 400ppm. And the system has a power save protection function. This ensures long-term reliability and accuracy consistency of the sensor.


CRIR series carbon dioxide sensor is especially suitable for indoor detection, with temperature compensation and alarm output function, using UART, Modbus protocol output. Maintenance free and short response time.

Banning (Nanjing) Sensing Technology Co., Ltd. provides Honeywell's original CO2 CRIR series sensors, which are available in a variety of mounting options, such as E1, M1, M1U and other models. This series of products is widely used, reliable, and recognized by customers.

It is also the core component of indoor air detectors such as IAQ and air purifiers. As an industry solution expert, Banning Sensing provides technical support and consulting services. Please call 400-7181-886 for any questions.

This article was written by Banning (Nanjing) Sensing Technology Co., Ltd.

Honeywell products purchase contact information: 400-7181-886

CRIR series CO₂ Sensor materials:

AA1     AA1     AA1  

ModelRangeAccuracyDAC  OutputDVCC OutputDifferent definitions of stitchDifferent output protocols of PWM
CRIR E1Can be extended to 5000 ppm±50ppm±5%YesNoreference datasheetreference datasheet
CRIR M1Can be extended to 10000 ppm±40ppm±3%NoYesreference user   manualreference user   manual
CRIR M1UCan be extended to 10000 ppm±40ppm±3%NoYesreference user   manualreference user   manual

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