28 Air Monitoring Wind measurement on land and sea


LCJ Capteurs are celebrating 20 years in business. The company founder, Mr Christian Lamiraux, was a profi cient engineer in the marine electronics sector and formerly a member of the French Navy’s aeronautic team. He was also part of CGG (SERCEL) and a specialist in hyperbolic marine radio-positioning, GPS and differential GPS.


Mr Lamiraux also set up MLR Electronique in 1979. MLR specialised in radio-positioning equipment for fi shing boats. He sold MLR Electronique in 1996 after having expanded the range of products to include pleasure boats, which made them a highly respected company throughout the whole European continent.


Mr Christophe Michel, the current CEO of LCJ Capteurs, worked for 18 years at MLR Electronique and joined Mr. Lamiraux in 2000, shortly after the creation of LCJ Capteurs. Mr. Michel took over all the company‘s shares in 2012.


LCJ Capteurs was created with the aim of designing a static and robust wind measurement sensor, for the marine sector, a logical idea as the LCJ team were very familiar with the needs of the marine electronics market. The sensor had to be lightweight and robust so it could be mounted at the head of the mast, as well as compact, with low power consumption - especially for yachts and sailboats on which energy consumption needs to be kept to a minimum. Ultrasonic measurement technology has become a must on a mast and LCJ Capteur’s CV3F fulfi lled all of the tough demands of the marine market.


LCJ Capteurs was supported by a state agency (ANVAR) for research and development, and patented its CV3F model for the fi rst time. Then came the marketing part of this innovative concept. As Messrs. Lamiraux and Michel were already well known in the marine electronics industry, the LCJ Capteurs reputation was increasing rapidly, especially for the professional boat market with the success of the CV3F. The reliability of this product has contributed considerably to the company’s growth in the marine market.


The ability to innovate and adapt was also paramount for the French company. After the mass production of the CV3F, market feedback revealed some imperfections, especially in rainy weather and on stable vessels. These drawbacks were adjusted and then patented around LCJ’s CV7 version that followed. The innovation of the CV7 focused on the geometry of the measurement vectors. Ultrasonic transducers usually communicate crosswise with 2 vectors. The CV7 works with a square geometry. It features 4 vectors, which reduces measurement inaccuracy while keeping the sensor dimensions very small. In addition, the refl ector part is conical which enables a more rapid and effi cient clearance of possible water droplets from the measuring window.


One day in 2011, a Danish distributor of intelligent building management products was invited on a sailing boat equipped with a CV7 ultrasonic wind sensor. He looked at the masthead and called out to the skipper “don’t you have a wind sensor?”, the skipper said “of course I do”, “but there is nothing rotating” replied the Dane, “well no, it’s a French company that makes static sensors” came the reply. Shortly after, LCJ Capteurs received a request for information, prices, an order, a request for modifi cation of the fi xture, a 0-10 V interface and almost overnight: LCJ Capteurs entered the terrestrial market.


LCJ Capteurs is located near Nantes, this city has an vibrant cultural life, including many outdoor events. Public safety requires wind measurement. From Nantes, the reputation for the product’s quality spread across France and the sensors are now to be found at some famous amusement parks such as Disneyland and Futuroscope. Various other applications like circuses, show stages and fountains, to name just a few, have required these wind vane-anemometers since then.


In 2014, the decision was made to participate in the Meteorological Technology World Expo for the fi rst time. Visitors were surprised by the well fi nished and industrialised features of the CV7. This was mostly down to the years of experience gained from the marine sector. There followed many requests and ideas for technical developments to adapt to the terrestrial market in a broader way. That same year, the wireless and ‘energy-free’ sensor also made its mark, with LCJ Capteurs being the fi rst company to offer this type of product.


Since all these technical adjustments and improvements were done, Since those early days in the terrestrial sector, 3 types of sensors are available from LCJ: NMEA0183 / Modbus - Analogue / Very low consumption (ULP) or zero power.


These terrestrial versions are supplied either mounted on vertical poles (external power supply or self-powered) or in OEM solutions to incorporate into the user’s own system. They are compatible with all interfaces used on weather stations.


According to the specifi cations defi ned with the customer, LCJ’s design department meets the requirements in order to create a tailor-made product.


Over 10 years, since the company has broken into the terrestrial market, the LCJ Capteurs’s wind vane anemometers have been used for various applications such as weather station integrators, data acquisition, digital agriculture, fi re departments, amusement parks, HVAC systems, mobiles on land, smart buildings, wind farms, sound measurement, pollution detection systems, sports and a host of others.


LCJ are still ambitious to grow and improve further in terms of responsiveness and they have been expanding their facilities in order to increase production and storage capacities. With 19,000 sensors that have been embedded so far since its creation in 1999, LCJ Capteurs is eager to continue to promote the best and most effi cient compact, accurate, robust, energy effi cient and lightweight ultrasonic wind sensors and is proud to offer professionals and individuals a reliable wind reading solution all around the world.


Today, the company is thriving, supported by high demand both in France and further afi eld, especially on the terrestrial market during the current Covid crisis. This growth has led to job creation and made it necessary to double the production area.


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industrial VOCs in water analysis Industrial facilities, all over the world, must comply with stringent environmental regulations for avoiding contamination by harmful chemicals in their wastewater discharge. The installation of precise and reliable monitoring equipment is key to avoiding contaminating the local environment, endangering human health and avoiding expensive and damaging litigation. Chromatotec’s airmoVOC WMS extracts volatile organic compounds (VOCs) from liquid and then analyses them by gas chromatography (GC) enabling the operator to identify the presence and quantity of contaminants such as BTEX and light to semi-volatile organic compounds (SVOCs).


Chromatotec’s systems integrates automatic water sampling with a fast loop; the sample is taken from just under the water surface to avoid fl oating particles on the surface and sludge at the bottom. The sampling system is deployed near to the water source, the water is pumped to the sampling and fi ltration unit and then on to the analyser withing its protective shelter. This system, which consists of Chromatotec’s highly successful airmoVOC analyser, a hydrogen generator to produce the carrier gas, a zero-air catalyser to remove unwanted particles and an internal calibration system provides unattended, precise and reliable data in real-time. This system has already been hugely successful within a wide range of industries ranging from pharmaceuticals to food and beverage and the drinking water sectors.


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A simple and effective tool for fi ghting radon contamination


Over ten percent of cases of lung cancer are linked to an excess of exposure to radon, according to a report from the World Health Organisation.


Radon (Rn) is present from a wide variety of natural and man-made sources. This odourless, colourless radioactive gas is the immediate decay product of radium resulting from the radioactive decay of uranium that takes place naturally in rock and soil. Hence all people are exposed to Rn in varying degrees.


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Most Rn in indoor air comes from soil and is proving to be more of a hazard than levels of Rn in the drinking water supply. The level of Rn inside a building is largely determined by its location and whether the ground on which it is located has signifi cant levels of uranium present to create the gas. Once Rn reaches the open air, it will rapidly dissolve to a relatively harmless, low concentration. However, if it rises in to a home or commercial property, it can be trapped and build up to dangerous levels for people inside the building. The radioactive decay will then create alpha particles, which in turn can cause permanent damage to lung tissue.


To combat this danger, Euro-Gas have developed the Radon SS, a unique, high performance phototransistor gas sensor capable of detecting a fi eld range of 0-65,000Bq/m3


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