Instrument Housing Articles
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Advanced Measurements: Integrating spheres for absorption, reflection, and absolute quantum yield
The ability to directly measure photophysical properties of new materials, whether in solution or in the solid state, is paramount to understanding their ability to be used in new generation applications and devices. The advent of readily available integrating spheres, especially when coupled to highly sensitive spectrometers, presents the ability for researchers to directly measure the emissive ...
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Inside the Gas Analyser – the Tuneable Diode Laser
OPSIS initially based all of its gas analysers on the differential optical absorption spectroscopy (DOAS) technology. It utilizes a broadband (white) light source and the spectral analysis is made over a fairly wide wavelength window, typically some tenths of nanometres. The light sources are fairly simple arc lamps while the complex technology is found in the spectrometers or interferometers ...
By OPSIS AB
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Vibration measurement and tree surgery: what products can tree surgeons use to help protect against vibration?
In a previous article, we introduced the risks faced by tree surgeons and arborists by vibration as part of their work. We touched on the effects of excessive vibration levels on tree surgeons and discussed some of the science behind how vibration levels are measured. Understanding the importance of protecting people against vibration is an important first step. The next thing to understand is ...
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Studying Clouds in the Antarctic with Micro Pulse LiDAR
Researchers in the Australian Antarctic Science project collected aerosol data above the Southern Ocean to improve their understanding of the connection between clouds and climate change. Evaporation and condensation are the basic concepts leading to cloud formation; however, many factors impact the end results. In general, as water vapor molecules rise from the surface of the Earth, they ...
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Measurement of a Doubly Substituted Methane Isotopologue, 13CH3D
ABSTRACT: Methane is an important energy resource and significant long-lived greenhouse gas. Carbon and hydrogen isotope ratios have been used to better constrain the sources of methane but interpretations based on these two parameters alone can often be inconclusive. The precise measurement of a doubly substituted methane isotopologue, 13CH3D, is expected to add a critical new dimension to ...
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The latest ground Gas monitoring innovations
The latest Ground Gas monitoring innovations The traditional methodology for ground gas monitoring has been ‘spot monitoring’ – taking event readings at various set times to predict the sub surface gas regime on both on Brownfield and Landfill sites. This methodology is in general current practice under both the EU Landfill Directive 1999/31/EC which is supported by ...
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Modular treatment system neutralizes process water
A self-contained pH control and monitoring sys- tem for ready mixed operations yields clean water for recycling or permitted discharge to the environment. Fortrans' Model 5000S uses car- bon dioxide gas to neutralize high-pH process water, offering precise alkalinity monitoring and control of water in pits, settling basins and other containment areas, as it lowers total suspended solids. ...
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