Formaldehyde Detection (CH2O)

Application areas of laser-based formaldehyde detection

nanoplus lasers for formaldehyde detection are used for various applications including:

  • Safety: 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.

Standard wavelengths for formaldehyde detection

nanoplus offers various wavelengths to target the vibrational-rotational bands of formaldehyde. Literature recommends the following wavelengths for formaldehyde detection:

Select your wavelength for formaldehyde detection

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!

Figure 1: Absorption features of formaldehyde in the 0.76 µm to 6.0 µm range
Absorption features of formaldehyde in 760 nm to 6000 nm range

Related information for laser-based formaldehyde detection

Specifications & Mountings

Applications

Papers & Links

The following tables analyse the typical specifications of the standard wavelengths for CH2O detection.

electro-optical properties of
3560.0 nm DFB interband cascade laser
symbolunitminimumtypicalmaximum
standard wavelengthλnm3560.0
absorption line strengthScm / mol∼ 6 x 10-20
output powerpoutmW> 1
threshold currentlthmA50
current tuning coefficientcTnm / mA0.2
temperature tuning coefficientcInm / K0.3
mode hop free tuning rangeΔλnm+/- 0.5
mounting options /
technical drawings
wavelengthTECcap with windowAR cap with AR windowfiberheatsinkcollimation
TO5.6 760 nm - 3000 nmNANANANANA
TO5 760 nm - 3000 nmNANA
TO663000 nm - 6000 nmNANA
c-mount 760 nm - 3000 nmNANANANANANA
SM-BTF760 nm - 2360 nmNANAsingle modeNANA
PM-BTF1064 nm - 2050 nmNANApolarization maintainingNANA

Ask for further packages.

Please find below a number of application samples.

Workplace exposure monitoring:

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). [9, 22, 78]

Please find below a selection of related papers from our literature list.

Let us know if you published a paper with our lasers. We will be happy to include it in our literature list.

#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 opportuneties for mid-IR seinsing;
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 2010, 10, 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.

#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.