November 2015Analytical Instrumentation & Environmental Monitoring
Yokogawa Meters & Instruments Corporation has announced the release of the AQ6375B optical spectrum analyser. Based on the company’s highly successful AQ6375, an optical spectrum analyser that utilises the dispersive spectroscopy technique, the AQ6375B incorporates a number of new features that improve the accuracy of measurements made in the 1,2 to 2,4 m wavelength range.
With the growing effort in recent years to reduce the amount of greenhouse gasses and other harmful substances that are released into the atmosphere, increased attention is being paid to techniques such as laser absorption spectroscopy that can perform highly accurate measurement of carbon dioxide, methane, and other gasses that have a harmful effect on the environment.
The use of near-infrared lasers with a 2 m wavelength is essential in laser absorption spectroscopy, and this laser emission spectrum needs to be measured with high accuracy.
Large-scale measuring systems with spectrometers are generally used to measure the emission spectrum of near-infrared lasers in the 2 m band. In November 2007, Yokogawa launched the AQ6375, a bench-top optical spectrum analyser that uses dispersive spectroscopy and supports the near-infrared wavelength range, and has continued to make contributions in this field.
There are some issues, however, that can affect the accuracy of measurements made with such instruments. One such issue is the negative impact that water vapour can have on the accuracy of spectra measurements in the upper near-IR wavelength region. Another is that there are some cases where the original optical spectrum cannot be accurately measured due to the effect of higher order diffracted light with a longer wavelength than the input wavelength.
The AQ6375B incorporates a number of new features that eliminate these effects and thereby improve the accuracy of measurements made in the 2 m band.
Product features
Purging mechanism to eliminate water vapour inside the spectroscope
The spectrum of the light under measurement can be measured with greater accuracy by eliminating the absorption of particular spectra that occurs as the result of water vapour being trapped inside the spectroscope. This is accomplished by a purging mechanism that eliminates the water vapour by continuously supplying a gas such as nitrogen through a connector on the back panel of the device.
Light blocking filter that reduces the effect of higher order diffracted light
The effect of higher order diffracted light with wavelengths that are two to three times longer than the wavelengths of incident light is reduced by a light blocking filter. This removes the light with wavelengths that are shorter than the range of measurement wavelengths contained in the incident light.
Yokogawa entered the optical measuring instrument market in the 1980s and since then has developed this business by focusing on visible-range light sources and optical power meters. In April 2004, Yokogawa acquired Ando Electric, one of the world’s top optical communications measuring instrument manufacturers, and since then has developed products that utilise the strengths of both companies.
With the aim of becoming one of the world’s top manufacturers of optical measuring instruments, Yokogawa takes into consideration the latest market trends and user needs when developing its products.
Ensuring occupational health and safety in mining
Analytical Instrumentation & Environmental Monitoring
Probe Integrated Mining Technologies (Probe IMT) has partnered with M3SH Technology to offer state-of-the-art environmental monitoring solutions that address these dual requirements.
Read more...Sustainability of surface water Endress+Hauser South Africa
Analytical Instrumentation & Environmental Monitoring
The sustainability of surface water is critical for South Africa’s economic development, social well-being and environmental health. Endress+Hauser has a full range of liquid analysis sensors and transmitters to measure important parameters and has an excellent global track record in water and wastewater process plants and various surface and industrial water monitoring sites.
Read more...Keeping an eye on invisible radiation Omniflex Remote Monitoring Specialists
Analytical Instrumentation & Environmental Monitoring
At its peak in 1994, the energy generation capacity of the UK’s nuclear power stations was 12,7 GW across 16 plants. In 2024, the capacity has fallen to around 5 GW, and the number of stations is down to nine. However, this is far from the end of the story as spent nuclear fuel remains radioactive for centuries, and requires rigorous safety processes to safeguard against leaks.
Read more...Effective dust control in sugar processing
Analytical Instrumentation & Environmental Monitoring
BLT WORLD specialists work in conjunction with the global ScrapeTec team to offer dependable solutions for specific problems at the transfer points of conveyor systems in many industries where dust and material spillage are concerns, including the sugar sector.
Read more...A benchmark for lubricant reliability in mining
Analytical Instrumentation & Environmental Monitoring
According to Craig FitzGerald from ISO-Reliability Partners, mines can save R500 000 or more on their yearly mill cleaning costs, while electricity consumption can be reduced by up to 12%, and lubricant consumption lowered up by up to 60% when using Bel-Ray Clear Gear lubricant.
Read more...Safeguarding precision in industrial radiometric measurements Mecosa
Analytical Instrumentation & Environmental Monitoring
In the complex landscape of industrial plant operations, precision is paramount, especially when it comes to weld inspections to test for structural integrity of pipes. Berthold has the ideal answer to this challenge – X-Ray Interference Protection.
Read more...New indoor air quality monitor RS South Africa
Analytical Instrumentation & Environmental Monitoring
RS South Africa has available a new indoor air quality (IAQ) monitor that provides continuous, easy-to-read, and accurate real-time monitoring of air quality in indoor environments.
Read more...A quick guide to disinfection Endress+Hauser South Africa
Analytical Instrumentation & Environmental Monitoring
The distribution system in a drinking water network provides a reliable supply of high-quality water to consumers. Endress+Hauser’s range of robust, low-maintenance sensors are ideal for monitoring disinfectant levels in the water.
Read more...Optimising energy consumption in the chemical industry Anton Paar
Analytical Instrumentation & Environmental Monitoring
To optimise energy consumption and save valuable resources on chemical process plants, operators have to continuously measure parameters such as concentration, raw density, sound velocity and refractive index. With Anton Paar’s wide product range, the process application team has many options for cutting-edge laboratory measurement technologies, and can develop tailor-made mathematical models for every application.