CO2 sensing

As it is urgent to suppress global warming, the need for improved efficiency of air conditioning such as air conditioning and heating is increasing.
In air conditioning control of high-rise office buildings and highly air-conditioned dwellings, its cooling and heating efficiency changes greatly depending on how much external air is taken in. By measuring the CO2 concentration in the indoor environment as the air quality standard and optimizing the operation of the air conditioning ventilation system, we will realize energy saving of comfortable indoor environment and air conditioning.
AKM's IR sensor has an optical filter that selectively transmits only the infrared absorption spectrum band of CO 2. This makes it easy to configure a non-dispersive optical (NDIR) CO2 sensor. This product features high sensitivity, high speed response, small package, contributing to miniaturization and low power consumption of CO2 sensor.
CO2 sensor equipped with AKM's IR sensor contributes to high efficiency of air conditioning system and realization of comfort environment (*1). Meanwhile, in the future, it is planned that the car air conditioner will shift to a CO2 refrigerant with an extremely low greenhouse effect instead of Freon (*2), but it is also ideal for its refrigerant leak detection (*3) application.
The AKM's IR sensor can also be used for flame detectors by detecting infrared emanating from flame.

*1 CO2 concentration of fresh air is normally 400ppm. If this concentration exceeds 2000ppm, it will cause drowsiness, headache and sense of fatigue.
*2 Chlorofluorocarbon has several hundreds to hundred thousand times GWP (Global Warming Potential) than CO2 in addition to damaging of the ozone layer. In Europe, all refrigerants that exceeds 150 GWP are banned for automotive air conditioner after 2017. VDA, (Verband der Automobilindustrie), has decided to use CO2 refrigerant from 2017 onward.
*3 Compressor pressure that use CO2 refrigerator is 10 times higher than the ones using chlorofluorocarbon; it operates at 100 atmospheric pressure. The AK9710 is capable to detect refrigerants leaks in a car.

NEW AK9710
IR Sensor with Optical Filter:
The AK9710 is suitable for NDIR CO2 sensing


CO2 absorbs infrared light of a specific wavelength. The AK9710 has an optical filter with a transmission band in the absorption band of CO2 in the IR sensor. This makes it easy to configure non-dispersive optical (NDIR: Non Dispersive Infrared) CO2 sensor by providing an external infrared light source.The CO2 sensor contributes to realization of a comfortable indoor environment and energy saving of air conditioning with high-rise office buildings and highly insulated, airtight houses. Also, by optimizing the operation of the air conditioning of the car as well as the housing, we reduce the load on the engine and the motor and contribute to improving fuel economy. On the other hand, it can also be applied as a refrigerant leak detection sensor for automotive air conditioning, which is scheduled to replace CO2 refrigerant in the future.
For automotive use (AEC-Q101 compliant) of this product will be mass-produced in August 2017 as AK9710AD.

● High Sensitivity, High Speed Response

Conventionally, a thermopile is used in an NDIR gas sensor. The AK9710 has a 3X higher sensitivity and more than 1000 times faster responsiveness than thermopile solutions.

● Integrate Optical Filter that Passes Infrared Observing Band

There is measurable spectrum in the infrared band of CO2. The AK9710 has an optical filter that only passes the infrared portion of the band. With this optical filter, system designs can be simplified.

● Small Plastic Package

SMD Type (3mm x 3mm x 1.01mm)


IR Sensor
with Optical Filter
Data Sheet Download >>>
Product Name AK9710AE AK9710AD (AEC-Q101 compliant)
Output Current Ip (nA)1.04 to 4.9
Internal Resistance (kΩ) 75 to 188
Optical Filter (μm)CWL : 4.28, FWHM : 0.27
Temperature Range (°C)-40 to 85-40 to 90
Size (D/W/H) (mm)
3 x 3 x 1.01
StatusIn Mass ProductionIn Mass Production from Aug. 2017

Ultrasmall and high sensitivity infrared sensor


IR1011 is a quantum-type ultrasmall infrared sensor corresponding to surface mounting, which can operate at room temperature.
This sensor is a InSb photo diode besed on manufacturing technologies of AKM's Hall elements.
The sensor can detect infrared with no power supply, and has features of quantum-type infrared sensor such as high sensitivity, high speed response and DC output.

IR1011 Product Page >>

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