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Formaldehyde (H2CO)

DETECT CH20 IN REAL TIME & IN SITU WITH UP TO PPB PRECISION

Formaldehyde

Major applications

nanoplus lasers detect water vapour detection in numerous applications, such as in workplace exposure monitoring.

Tunable diode laser spectroscopy allows measuring CH2O with up to ppb precision in real time and in situ. Providing long-term stability and requiring little maintenance, nanoplus lasers are suitable for operation in harsh environments.

WHICH ABSORPTION LINE IS THE PERFECT ONE FOR YOUR APPLICATION?

Typical Wavelength

Select your target wavelength

nanoplus offers various wavelengths to target the vibrational-rotational bands of formaldehyde. Select the target wavelength that fits your application best.

The literature recommends several options. They are illustrated in the graphic on the right, which shows the relative intensities of the possible absorption lines. To define the most suitable CH2O wavelength for your application, you may have a look at our literature recommendations below or refer to the HITRAN database from the Smithsonian Institute.

We present the most common Distributed Feedback lasers for CH2O detection below. Learn more about their specifications.

Factors which you should consider in your setup

Above wavelengths as well as further customized wavelengths for formaldehyde detection are available from nanoplus.

When you choose your wavelength, you have to consider your product set up, environment and nature of the measurement.

These factors influence the optimum wavelength for your application. Do have a look at the Hitran Database to further evaluate your choice of wavelengths. Our application experts are equally happy to discuss with you the most suitable wavelength for your application.

Let us know the wavelength you require with an accuracy of 0.1 nm!

Read More

Further Reading

Applications & Papers

We compiled several papers on formaldehyde detection based on tunable diode laser absorption spectroscopy. Refer to below literature list to read more or select your paper by application.

Applications
CH2O
Workplace exposure monitoring: CH2O

Formaldehyde has been used in consumer and industrial products since the beginning of the 19th century. Currently the annual formaldehyde production accounts for 21 million tons. About 50 % are processed as adhesives in pressed wood panels. In 2004 formaldehyde has been classified carcinogenic by the International Agency for Research on Cancer. Since then formaldehyde concentrations have been strictly controlled in the production process as well as in the finished product. Laser-based measurement systems are required to detect the maximum levels of 0.01 ppb (USA) and 2 ppb (EU).

[ 143 , 114 , 108 , 78 , 22 , 9 ]
Papers & Links
# 2 Advanced Gas Sensing Applications Above 3 µm with DFB Laser Diodes
L. Naehle, L. Hildebrandt, M. Fischer, J. Koeth, Gases & Instrumentation, March/April 2012, pp. 25 - 28,
# 5 DFB lasers exceeding 3 µm for industrial applications
L. Naehle, L. Hildebrandt, Laser+Photonics, 2012, pp. 78-80,
# 7 DFB laser diodes expand hydrocarbon sensing beyond 3 µm
L. Hildebrandt, L. Naehle, Laser Focus World, January 2012, pp. 87-90,
# 8 ICLs open opportunities for mid-IR sensing
L. Naehle, L. Hildebrandt, M. Kamp, S. Hoefling, Laser Focus World, May 2013, pp. 70-73.,
# 9 DFB Lasers Between 760 nm and 16 µm for Sensing Applications
W. Zeller, L. Naehle, P. Fuchs, F. Gerschuetz, L. Hildebrandt, J. Koeth , Sensors, 10, 2010, pp. 2492-2510.,
# 22 Sensing of formaldehyde using a distributed feedback interband cascade laser emitting around 3493 nm
S. Lundqvist, P. Kluczynski, R. Weih, M. von Edlinger, L. Naehle, M. Fischer, A. Bauer, S. Hoefling, J. Koeth, Appl. Opt., , 51, 25, 2012, pp. 6009-6013.,
# 36 Single mode interband cascade lasers based on lateral metal gratings
R. Weih, L. Naehle, Sven Hoefling, J. Koeth, M. Kamp , Appl. Phys. Lett., 105,7, 2014, pp. 071111.,
# 63 Breath Analysis Using Laser Spectroscopic Techniques: Breath Biomarkers, Spectral Fingerprints, and Detection Limits
C. Wang and P. Sahay, Sensors, 9, 2009, 8230 - 8262,
# 78 Ppb-level formaldehyde detection using a CW room-temperature interband cascade laser and a miniature dense pattern multipass gas cell
L. Dong,Y. Yu,.C. Li, S. So, F. Tittel, Optics Express, Vol. 23, Issue 15, 2015, pp. 19821-19830.,
# 106 Recent progress in laser‑based trace gas instruments: performance and noise analysis
J. B. McManus, M. S. Zahniser, D. D. Nelson et. al., Appl. Phys. B, 2015, 119: 203.,
Do you have further questions?

Need help?

Contact us

If you have any questions on above wavelengths or require advice on making your choice, our experts will assist you. Just email us or give us a call.