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Improved performance for air sampling worth raving about
Restek’s RAVE+ diaphragm valves offer enhanced features that bring premium performance to air sampling operations. Unlike other valves that contain soft
polymeric materials, RAVE+ valves are 100% stainless-steel construction, which eliminates sample contamination from off-gassing, prevents target compounds from being lost due to adsorption, and ensures a longer service life. The valve port threads are roller hardened to increase durability, resist damage, and prevent leaks. Rugged, work-hardened, proprietary, all-metal valve seats provide protection against particles that cause leaks. In addition, a VOC-free, thread-locking adhesive prevents the valve knob from loosening and ensures it stays securely in place. RAVE+ valves also now feature a built-in hard stop that prevents users from turning the knob too far and locking the valve open. As a fi nal measure to ensure reliable performance, every RAVE+ valve is helium leak tested to 1x10-6 mL/sec prior to shipping. With these enhanced features, RAVE+ diaphragm valves build on the high-quality standard of original RAVE valves and provide superior performance for air sampling.
Now standard on Restek’s full line of SilcoCan, TO-Can, and miniature air sampling canisters, these newly redesigned, state- of-the art valves are also ideal for upgrading existing canisters. Rugged, all-metal RAVE+ valves can be ordered with Siltek treatment for added inertness and with either two or three ports to accommodate an optional gauge. Diaphragm rebuild kits and RAVE+ guards are also available to further extend the life of these long-lasting air valves.
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JCT stands for reliable transfer of sample gas from the stack to the analyzer to ensure trust-worthy results
Air Monitoring 25
An ideal solution for ambient and indoor air monitoring Eco Physics’
Gas Sampling Probes
nCLD AL2 is the ideal instrument for ambient air monitoring, either installed in racks, at fi xed monitoring
Portable
Gas Conditioning Systems
Sample Gas Compressor Coolers
stations or in mobile laboratories. This analyser is also suitable for indoor air quality monitoring for instance in production plants and offi ces (TLV = threshold limit value). The nCLD AL2 is a two-channel NOX-detector based on a modular principle. The measurement ranges are individually adjustable within 50’000ppb at a minimum detectable concentration of 0.4ppb. The parameters NO, NO2 and NOX are measured and displayed simultaneously. All of the nCLD AL2’s essential components within the chemiluminescence analyser host their own CPU, which reports all data to the mainframe by BUS-communication. The measurement principle will conform to the standard method for NOX-detection in ambient air and complies with TUV-regulation (VDI4202 block 1, ISO/EN.14211).
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Usually, high nitrous oxide emissions occur from agricultural soils, where the availability of mineral nitrogen is high because of nitrogen fertilisation and other management practices. Since the nitrogen cycling in cold Arctic soils is slow, they have previously been regarded as unimportant nitrous oxide sources. Based on accumulating evidence during the past years, however, this is not always true: nitrous oxide release has been found to be a common phenomenon in permafrost-affected soils, and the emissions increase with warming, disturbed vegetation cover and permafrost thaw.
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Novel source of the strong greenhouse gas nitrous oxide found in Siberian permafrost
“The nitrogen release from thawing permafrost can substantially improve the availability of nitrogen in Arctic ecosystems, which, in addition to the direct climatic feedback in the form of nitrous oxide, may have important consequences on carbon fi xation by plants and eutrophication of water systems,” says Postdoctoral Researcher Maija Marushchak from the University of Eastern Finland, the lead author of the study.
High quality wind measurement solutions Engineered and manufactured in the UK by Windspeed
Ltd, and made to the demanding accuracy, reliability and durability requirements of the wind energy industry, “Vector Instruments” brand “First Class” wind sensors are engineered to perform and built to last, making them ideal for many uses including industrial, agricultural, road, rail, fi re, aeronautics, marine, military, research and general meteorology.
This wind instrument range has proved itself over many years in applications worldwide by industry, research and weather agencies, with A100/W200 series models being popular wind sensors for many Government Meteorological Agencies.
These robust instruments have provided users with good wind data throughout some of the most powerful typhoons and cyclones in recent years. Special severe environment variants are available for applications exposed to corrosive atmospheres, salt/sea water, abrasive dust and extreme conditions.
Constructed with highest-quality components, these A100/W200 series wind sensors yield better measurement accuracy, lower power-consumption, higher durability & longer service life than other mechanical/ultrasonic wind sensors on the market. Many years of fi eld experience and design optimisation mean they can outperform other wind measurement technologies in many meteorological applications, achieving high accuracy while needing little or no maintenance for extended periods.
With 50 years of experience designing and manufacturing wind sensors and on-going development, these wind instruments are in use worldwide and have a proven track record and long service life and provide a solution to all wind sensor needs.
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