Thumbnail
Access Restriction
Open

Author Köhring, Michael ♦ Böttger, Stefan ♦ Willer, Ulrike ♦ Schade, Wolfgang
Source World Health Organization (WHO)-Global Index Medicus
Content type Text
Publisher Multidisciplinary Digital Publishing Institute
File Format HTM / HTML
Language English
Difficulty Level Medium
Subject Domain (in DDC) Natural sciences & mathematics ♦ Chemistry & allied sciences ♦ Life sciences; biology ♦ Biochemistry ♦ Technology ♦ Medicine & health ♦ Pharmacology and therapeutics ♦ Diseases ♦ Manufacture for specific uses ♦ Precision instruments & other devices
Subject Domain (in MeSH) Inorganic Chemicals ♦ Organic Chemicals ♦ Complex Mixtures ♦ Chemicals and Drugs ♦ Diagnosis ♦ Investigative Techniques ♦ Analytical, Diagnostic and Therapeutic Techniques and Equipment
Subject Keyword Discipline Biotechnology ♦ Biofuels ♦ Analysis ♦ Photoacoustic Techniques ♦ Instrumentation ♦ Quartz ♦ Chemistry ♦ Spectrum Analysis ♦ Carbon Dioxide ♦ Methane ♦ Journal Article ♦ Research Support, Non-u.s. Gov't
Abstract A new sensor for methane and carbon dioxide concentration measurements in biogas plants is presented. LEDs in the mid infrared spectral region are implemented as low cost light source. The combination of quartz-enhanced photoacoustic spectroscopy with an absorption path leads to a sensor setup suitable for the harsh application environment. The sensor system contains an electronics unit and the two gas sensors; it was designed to work as standalone device and was tested in a biogas plant for several weeks. Gas concentration dependent measurements show a precision better than 1% in a range between 40% and 60% target gas concentration for both sensors. Concentration dependent measurements with different background gases show a considerable decrease in cross sensitivity against the major components of biogas in direct comparison to common absorption based sensors.
Description Author Affiliation: Köhring M ( Fraunhofer Heinrich Hertz Institute. michael.koehring@hhi.fraunhofer.de.); Böttger S ( Fraunhofer Heinrich Hertz Institute. s.boettger@phototherm.de.); Willer U ( Clausthal University of Technology, IEPT, Am Stollen 19B, Goslar 38640, Germany. ulrike.willer@tu-clausthal.de.); Schade W ( Clausthal University of Technology, EFZN, Am Stollen 19A, Goslar 38640, Germany. ulrike.willer@tu-clausthal.de.)
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Reading ♦ Research ♦ Self Learning
Interactivity Type Expositive
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2015-05-22
Publisher Place Switzerland
e-ISSN 14248220
Journal Sensors
Volume Number 15
Issue Number 5


Source: WHO-Global Index Medicus