16 Weather Monitoring
application, wind power plants, sea platforms, buoys, crane application and many professional meteorological applications all over the world.
• For installation sites with high risk of icing, specially heated sensors are necessary. The LAMBRECHT PROF-IX mechanical “Ice-Free” wind
sensor has an internal heating of 125 Watt, which protects the sensor from icing under most cold climate conditions. The sensor is able to melt down snow and ice and to remain ice- free. Since more applications are to be found at cold climate conditions, there is a high demand for fully heated sensors.
AUTHOR DETAILS L. Wilhelm
Sales Department Wilh. Lambrecht GmbH GERMANY
In addition to the mechanical Ice Free sensor PROF-IX2, LAMBRECHT provides for specially heated static wind sensors EOLOS and BLUESONC. These sensors are fully heated with 70 / 240 Watt. The measuring element of the EOLOS sensor is hot, the hat and the housing are also heated. Due to this special heating technology these sensors are well- protected from icing.
All LAMBRECHT sensors fulfil the requirement of EU EMC Directive 89/336/EC and 73/23/EC, Vibration test EN60945/VB0240, Saline mist test EN60954:2002.8.12.3 and IP class test 60529:2000.
The LAMBRECHT product line covers the full range of wind sensors with all kind of established measuring principle: Sensors with moving parts and without moving parts, hot-wire and ultrasonic sensors, unheated and partly heated sensors, fully heated “ice-free” sensors, “all-
Lambrecht philosophy is to provide as much sensors as necessary, not as much as possible. Lambrecht´s intention is the perfect sensor solution for individual customer demand with the best quality and best price performance ratio in the world of professional meteorological instruments.
LAMBRECHT provides all meteorological instruments, tools and mounting devices as well as software and data loggers for comfortable and easy handling, AWS, rain and wind warning systems as well as compact AWS for industrial applications. LAMBRECHT sensors and systems are the result of 150 years of experience in professional meteorology. LAMBRECHT grants a long term service for all products, spare parts and maintenance support and a fair pricing.
aluminium” sensor design, all kind of output signals and protocols, different measuring ranges and resolutions.
The best sensor for the individual application
Insight Into Climate Change
A Model CE440 Elemental Analyser from Exeter Analytical is being used by one of the world’s leading environmental research centres, British Antarctic Survey (
www.antarctica.ac.uk), in its climate change research on lake and ocean sediments.
British Antarctic Survey commented "We have used CHN/O/S Elemental Analysers from Exeter Analytical for some years and initially chose the system due to its unique horizontal furnace design which made it ideal for the analysis of our sample types. One of our recent applications for the CE440 Elemental Analyser is sediment cores, laid down over periods of thousands of years, collected from lake and ocean environments because they contain a wealth of organic and inorganic remains from which it is possible to reconstruct past environmental and climate changes. Measurements of total organic carbon accumulation rates provide an index of past biological production which is often a function of temperature, and measurements of carbon to nitrogen ratios (C:N) combined with independent measurements of the carbon stable isotopes provide a diagnostic tool for identifying the sources of the organic matter. These standard measurements underlie many of the subsequent analyses conducted on the cores".
Paul Hemming, European Sales Manager for Exeter Analytical said "With its wide linear range, proprietary combustion technology and horizontal furnace design allowing for removal of residues between runs, the Exeter Analytical CE440 Elemental Analyser is uniquely suited to accurately analysing complex materials such as soils and sediment samples". He added "We are proud that one of our analysers forms part of the vital ongoing programme of research being undertaken by staff at British Antarctic Survey".
British Antarctic Survey (BAS) has a long and distinguished history of carrying out research and surveys in the Antarctic and surrounding regions, undertaking most of the British research on the frozen continent. The close linking of its science programmes with essential logistics support makes them very effective in carrying out the complicated and sophisticated scientific field programmes that are necessary today. The current BAS science research strategy is called Polar Science for Planet Earth (PSPE). The strategy was based on proposals from staff and consists of 6 integrated programmes. In addition the competitive Antarctic Funding Initiative (AFI) provides access to Antarctica for BAS and NERC staff and the UK university community.
As a company dedicated to elemental microanalysis, Exeter Analytical’s nearly 30 years of involvement with instruments, consumables and supplies has allowed them to better understand the whole problem facing microanalysts. As a consequence whether you are a regular or an occasional purchaser - experienced and knowledgeable staff are always available to provide free informed advice.
Reader Reply Card no 41
Accurate Measurement of Photosynthetically Active Radiation (PAR)
Kipp & Zonen (The Netherlands) proudly presents the latest development for light measurement in agronomy and horticulture: the PQS 1 PAR Quantum Sensor. An improved and user-friendly instrument for the measurement of Photosynthetically Active Radiation. PAR is the part of the light spectrum which plants use for growth processes and is an important parameter for horticultural and forestry applications.
PQS 1 features a much improved responsivity, providing an excellent match with the ideal PAR response. This significantly increases the measurement accuracy over the previous PAR Lite and rivals the best comparable instruments.
The PQS 1 PAR Quantum Sensor is designed to provide accurate, continuous measurement of PAR outdoors or indoors. The rugged construction makes it well protected from harsh weather conditions around the world and from exposure to for example pesticides.
Reader Reply Card no 42
New Enhanced High Current Winter Lightning Detection Capability
Electric power transmission systems depend increasingly on lightning location information in the design, monitoring and maintenance of their operations. High current lightning strokes are a significant threat to the dependability of electric power transmission, because they can do severe damage to power lines. Being able to detect and locate these events means savings in both time and money as the fault locations can be found more quickly, and electricity can be re-routed to a different path.
In Japan, lightning events along the coast of the Sea of Japan during the winter months emit particularly different waveforms than the majority of other lightning events, which makes them hard to detect or classify properly. To address this problem, Vaisala (Finland) has worked together with Tohoku Electric Power Company and Sankosha Corporation to develop improved lightning sensor software. The result of the joint R&D effort is the Vaisala Thunderstorm CG Enhanced Lightning Sensor LS7001, which delivers double the detection accuracy of high peak current winter lightning discharges compared to older sensors.
New Parameters to Detect Different Electromagnetic Waveforms
The significant improvement in the high amplitude detection performance was achieved by studying electromagnetic waveforms generated by winter lightning and then developing new parameters for their detection. The LS7001 is able to continuously sample and process detected signals eliminating the dead time problems of previous sensor generations. Enhanced self- test and calibration capabilities permit the simulation of more complex waveforms and help achieve a significant improvement in stroke time measurements.
As a part of the cooperative research project, a six sensor network of LS7001 sensors was deployed in the Tohoku region during the 2009/2010 winter lightning season. Data from Lightning Electromagnetic Pulse (LEMP) recording equipment operated by Tohoku Electric Power Company and information from lightning caused failures in Tohoku’s transmission line systems demonstrated significant improvements in lightning detection performance.
The project will continue through the 2010/2011 winter lightning season. The algorithm updates employed in the reprocessing will be implemented in sensor software, which will be downloadable into most existing LS sensors, making improved detection performance available for energy and power industries around the world.
Reader Reply Card no 43
IET
November/December 2010
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