Gas Detection

  • Evaporative Emissions Testing with the GASERA ONE SHED
    A 3-day diurnal test shows simultaneous measurement of ethanol, methanol and refrigerants
  • Detection limits measured with the GASERA ONE SHED

Evaporative Emissions Testing with the GASERA ONE SHED

Mar 12 2018 Read 403 Times

Evaporative losses from the fuel system have to be tested and quantified for vehicle certification. The GASERA ONE SHED allows direct monitoring of evaporative emissions as part of the qualification testing procedures for vehicles.

Evaporative emissions testing is mandatory for new vehicles before commercialization. The use of biofuel-gasoline blends, such as E10, is increasing globally. The measurement of ethanol is regulated and mandated by various government regulations. Methanol and refrigerants are measured for additional information. Evaporative emissions of ethanol originate from fuel handling systems. Ethanol can evaporate from the tank and permeate through fuel hoses. Methanol evaporates from the windshield washer fluid.

The Sealed Housing Evaporate Determination (SHED) test monitors evaporative emissions in the automotive industry to ensure compliance to the regulatory requirements. Photoacoustic IR spectroscopy (PAS) is used for the SHED testing and it is the most practical one from various measurement methods (e.g. GC-FID, PTR- MS). New evaporative emissions testing requirements create a demand for ultimate sensitivity and selectivity. The GASERA ONE SHED is based on the photoacoustic detection technology with improved sensitivity provided by the patented optical microphone solution.

The GASERA ONE SHED is an automatic and standalone measurement system that uses an external cavity quantum cascade laser (EC-QCL) as the light source. The GASERA ONE SHED allows simultaneous, accurate and sensitive measurement of all target components, ethanol, methanol and refrigerants R-134a and HFO-1234yf with superior detection limits. Contrary to measurement methods requiring impinger benches and remote laboratory analysis, the GASERA ONE SHED performs direct monitoring inside the chamber. It performs well in the true SHED chamber environment containing H2O and CO2. Due to the high resolution of the laser source, ethanol and methanol can be accurately distinguished from each other. In addition to ethanol and methanol, the GASERA ONE SHED can monitor refrigerant leakage simultaneously and without cross-interference. Read more from

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 December 2018

December 2018

In This Edition Business News - Celebrating 50 years of Swiss engineering in Manchester - Taking a closer look at algal blooms - Sonardyne acquires maritime and marine science technology sp...

View all digital editions


Abu Dhabi Sustainability Week

Jan 12 2019 Abu Dhabi, UAE

World Future Energy Summit (WFES 2019)

Jan 14 2019 Abu Dhabi, UAE

Energy from Biomass Combustion

Jan 15 2019 Leeds, UK

National Biodiesel Conference + Expo

Jan 21 2019 San Diego, CA, USA

Abwasser Praxis

Jan 23 2019 Offenburg, Germany

View all events