Gas Detection

  • Innovative PbSe detectors offer ideal solution for gas measurement at low concentration levels

Innovative PbSe detectors offer ideal solution for gas measurement at low concentration levels

Nov 20 2018 Read 485 Times

Non-Dispersive Infrared (NDIR) spectroscopy is by far the most commonly used gas detection method used today. Gas is passed through a measurement cell where a broadband IR source is used to emit light through the cell to a detector. The detector uses IR optical filters to filter the light into an active channel at the absorption wavelength of the target gas and a reference channel. The advantage of NDIR comes from the strength of absorption in the mid IR compared to methods based on near infrared. The strong absorption allows relatively low concentrations of gas to be detected with small path lengths and inexpensive components.

In order to measure gases at particularly small concentrations or very quickly a high sensitivity detector is required, PbSe devices with a responsivity of values of as high as 120k V/W. The devices are manufactured in standard TO style packages and have long expected lifetimes, making them ideal for fit and forget applications such as gas sensing.

Laser Components manufactures a range of innovative lead salt detectors at their factory in Tempe, Arizona. The PB55 is a collection of thermo-electrically cooled polycrystalline biased single element PbSe detectors with a 20% cut off̀ at 5.2 microns and a maximum element size of 6 x 6mm2.

Read comments0

Do you like or dislike what you have read? Why not post a comment to tell others / the manufacturer and our Editor what you think. To leave comments please complete the form below. Providing the content is approved, your comment will be on screen in less than 24 hours. Leaving comments on product information and articles can assist with future editorial and article content. Post questions, thoughts or simply whether you like the content.

Digital Edition

International Environmental Technology February 2019

February 2019

In This Edition Business News - Changes on the Endress + Hauser Executive Board - Nivus in full flow - Yokogawa announce appointment of President and Chairman Gas Detection - ATEX app...

View all digital editions


ChemTech World Expo 2019

Feb 20 2019 Mumbai, India

WaterEx World Expo 2019

Feb 20 2019 Mumbai, India

Water Expo 2019

Feb 21 2019 Chennai, India

EUEC 2019

Feb 25 2019 San Diego, CA, USA

Safety at Work. Labour Protection Workwear

Feb 26 2019 Minsk, Belarus

View all events