Hydrogen Chloride

nanoplus Nanosystems and Technologies GmbH Applications Applications by Gas Hydrogen Chloride

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

Hydrogen Chloride

Major Applications

nanoplus lasers detect hydrogen chloride in numerous applications, such as in emission control as well as chemical process monitoring.

Tunable diode laser spectroscopy allows measuring HCl 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 Wavelengths

Select your target wavelength

nanoplus offers various wavelengths to target the vibrational-rotational bands of hydrogen chloride. 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 HCl 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 HCl detection below. Learn more about their specifications.

1742 nm

3395 nm

Factors which you should consider in your setup

Above wavelengths as well as further customized wavelengths for hydrogen chloride 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!

Applications & Papers

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

Applications

HCl

Monitoring of exhaust fumes: HCl

HCl monitoring is essential in industries such as waste incineration, cement production, and chemical manufacturing to prevent equipment corrosion and comply with emission regulations. Continuous measurement of HCl concentrations in exhaust gases provides valuable information about combustion efficiency and process stability. This data helps operators optimize plant performance and reduce environmental impact.

[ 211 , 204 , 163 , 144 , 135 ]

Papers & Links

# 211 Interband cascade laser absorption sensor for sensitive measurement of hydrogen chloride in smoke-laden gases using wavelength modulation spectroscopy

K. L. Fetter, L. Munera, M. A. Watts, D. I. Pineda , Appl. Opt. 63, 63, 2024, 8517-8525,

# 204 Laser Absorption Measurements of HCl in a Shock Tube for Investigating the Chemical Kinetics of Rocket Propellants

C. M. Grégoire, E. L. Petersen, AIAA SciTech Forum, 2025,

# 163 Towards a dTDLAS‑Based Spectrometer for Absolute HCl Measurements in Combustion Flue Gases and a Better Evaluation of Thermal Boundary Layer Effects

Z. Qu, J. Nwaboh, O. Werhahn, V. Ebert, Flow, Turbulence and Combustion, 106, 2021, 533 - 546,

# 144 Accurate analysis of HCl in biomethane using laser absorption spectroscopy and ion-exchange chromatography

J. A. Nwaboh, H. Meuzelaar, J. Liu, S. Persijn, J. Li, A. M. H. van der Veen, N. Chatellier, A. Papin, Z. Qu, O. Werhahna, V. Eberta, Analyst, Iss. 4, 2021.,

# 135 Interband cascade laser absorption of hydrogen chloride for high-temperature thermochemical analysis of fire-resistant polymer reactivity

D. I. Pineda, J. L. Urban, R. M. Spearrin,, , Appl. Opt., Vol.59, No.7, 2020, pp. 2141-2148.,