New optoelectronic devices for the Mid-Infrared spectral range open completely new possibilities for portable sensors creation. Using Mid-infrared LED-PD optopairs allows developing an instrument that is smaller, less expensive and versatile.

Carbon dioxide detection

Carbon dioxide has a wide range of commercial uses, from the production of lasers to the carbonation of soft drinks. This gas has become a topic of interest because it is classified among the greenhouse gases, gases which impact the Earth's environment when they reach high concentrations in the atmosphere.
Carbon dioxide has the main absorption band at 4200-4300 nm (the data are taken from HITRAN Catalogue). So, we recommend using light emitting diode Lms43LED and Lms43PD series photodiode.

Spectra of LEDs and PDs for CO2 detection:


Range of applications:
• HVAC (heating, ventilation, and air conditioning)
• refrigeration and cooling
• foods and beverages (measurement of CO2 concentration during drinks carbonation, winemaking process, bakery etc.)
• greenhouses (CO2 emission control)
• pharmacy and other chemical processing (quantification of liquid CO2 used as solvent)
• automotive industry (combustion control, welding control)

Advantages of our devices:
✔  Possibility to arrange a compact design of an optical cell thanks to compact size of the LED chip – 0.35 × 0.35 mm
✔  No need of using additional optical filters – LED emission band width is comparable to absorption band width of CH4
✔  Low power consumption (<1 mW)
✔  Short response time (10‒50 ns)
✔  Possibility to achieve modulation ranges of up to 100 MHz
✔  Operation temperatures up to +150°C
✔  Lifetime of 80 000 hours


LED-PD based Evaluation systems for carbon dioxide
For quick start we offer out-of-the-box solutions that can be launched with minimal effort – evaluation systems:
CDK evaluation kit with modular design that includes:
- Light emitting diodes Lms43LED (other LED is available) with an LED driver
- Photodiode Lms43PD-03 (other PD is available) with a preamplifier
- SDM synchronous detector
- Any additional component(s) can be added by request

NEW CDK-c evaluation kit with modular design that includes:
- LED Lms43LED-CG (LED with a special glass covering) with an LED driver
- Photodiode Lms43PD-CG (PD with a special glass covering) with a preamplifier
- SDM synchronous detector
- Any additional component(s) can be added by request

COMING SOON CDS-5 system with a compact optical cell that incorporates an LED and a photodiode with a special glass covering. It includes all the needed circuitry for quick setup: LED driver, photodiode preamplifier, synchronous detector.

COMING SOON СDS-4 carbon dioxide sensor module – a low-cost “on-board” system with very low power consumption that includes a compact optical cell and electronics for LED power supply and PD signal amplification all-in-one.

Download the brochure