News

    Sensor at Mines & Technology Helsinki, Jun 2017

     

    Mines and Technology 2017 focused on optimising mining efficiency with cutting-edge technologies. Based on the practical case studies from the leading mining companies in the world and presentations from innovative solution providers, Mines and Technology will address only the most critical topics and concerns of the target market and which technologies are best placed to address these.

    Sensor was presenting its newest cutting edge technologies in geomembrane leak detection. Thank you all who visited our stand


    Moldova could take over Sensor's experience in solid waste management

     

    Sensor held seminar at the Ministry of Regional Development and Construction with reference to Sensor's experience in solid waste management and implementing of geomembrane leak detection solutions into the landfills in Moldova.

    The event was attended by representatives of the Regional Development Agencies, State Construction Inspection, designers, architects etc.

    The seminar also attended Moldavian Deputy Minister of Ministry of Regional Development Mr. Ion Stratulat and also Head of Slovak Embassy in Moldava Ambassador Robert Kirnag.

    Participants showed great interest in modern technologies in the construction of landfills in Moldovan republic. 


    Sensor at Mines & Technology London, November 2016

     

    Mines and Technology offers the ideal opportunity for mining professionals to understand how to address crucial technology issues.

    Sensor CEO RNDr. Vladimir Nosko, PhD. had delivered a presentation during the conference about the most innovative Sensor technology for geomembrane leak monitoring at mining industry. 


    Sensor at Moldovan Better Environment Conference, October 2016, Chisinau, Moldova

     

    Slavo Spes, MSc., Executive Manager of Sensor was one of the key speakers at the conference talking about the environmental projects in Moldova.

    The event has been held thanks to support from the Ministry of Foreign and European Affairs of the Slovak Republic and the Slovak embassy in Moldova. 


    Sensor at Mining Turkey, Istanbul, 24-27 November 2016

     

    Sensor will be present at the 7th International Mining fair. It will open its doors for the sector professionals at Tuyap Fair Convention and Congress Centre on 24-27.11.2016.

    You are welcome to visit us at Hall 3, Stand 304B. We are looking forward to see you there. 

     

     


    Sensor at Eurogeo 6, Ljubljana, 25-28 September 2016

     

    Sensor will be present at the 6th European congress on Geosynthetics - Eurogeo 6 held in Ljubljana, Slovenia from 25th September -28 September 2016 under the organisation of Turkish chapter of IGS. 

    You are welcome to visit us at Floor E, booth no. 130-131. We are looking forward to see you there. 

     

     


    How to prevent your flat roof from leaking - Stavebne Materialy magazine

     

    In 06/2016 issue of Slovak "Stavebne Materialy" magazine Sensor has posted an article about prevention and localisation of leaks on flat roofs.

    Full article you can find on this link http://www.sensorgroup.com/download/sensor-publications/ 

     

     

     


    Sensor at IFAT 2016, Munich, May-June 2016

     

    Sensor was present at the biggest waste management exhibition in the world IFAT 2016 held in Munich from 30th May -3 June 2016. 

    As usual, Sensor introduced absolutely new technology as a result of its continuous development program - Smartank, the new way of building leak detection concrete tanks for liquids. 

     

    IFAT is the World's Leading Trade Fair for Water, Sewage, Waste and Raw Materials Management, and is a place where visitors can find strategies and solutions for using resources in intelligent cycles in a manner that ensures their long-term preservation—with a great deal of success.

     

     


    Sensor at International Conference Contaminated Sites, Bratislava, June 2015

     

    Sensor's Executive Manager Mr. Slavo Spes held a presentation called "Assesment Of The Environmental Burdens Using Geophysical Techniques" during international conference Contaminated Sites in Bratislava on the 28th of May 2015.

    The conference was organised under auspices of the Slovak Ministry of Environment by Slovak Environmental Agency and was focused on legislative strategies, research methodology, risks analysis, remediation methods and new technologies around environmental burdens or environmental damage management. 


    SENSOR DDS MIT training at COMANCO, Plant City, FL, USA, May 2015

     

    Comanco has purchased three new ‘electronic leak detection systems’ capable of detecting holes in liner, as small as 1 to 2 mm. RNDr. Vladimir Nosko, PhD., CEO of SENSOR, was on hand to demonstrate the capabilities of this new technology. Unlike conventional spark testing, the SENSOR arc testing system will work with all non-conductive geosynthetic materials, including GCL. When the wand detects a leak in the liner, the unit sounds an audible alarm alerting the operator and allowing them to zero in on the exact location of the leak, by viewing an arc. A battery pack generating 6,000 to 30,000 volts is grounded at one end with a probe that is inserted into the ground and connected to the wand at the other end. The ground beneath the liner becomes a conductor and when the conductor in the wand passes over a hole, an arc is generated completing the circuit. Despite the high voltage, the amperage is very low which means the operator is totally safe.Comanco’s General Super QC, Bob Lung, had a chance to test the new system in a demonstration conducted outside on a test patch of liner.

    Following some trial and error and coaching from RNDr. Vladimir Nosko, PhD., Bob was able to master the technique, identifying multiple leaks including both wedge welded and extrusion seams. The ARC Tester has some limitations as the surface being tested must be totally dry. Any moisture will absorb the current and nullify the connection. The second issue is the liner material must be as flat as possible and in contact with the conductive subgrade. Bubbles or wrinkles higher than 2 inches may not register a leak. The recommended time for optimum testing is early morning or in the cool of the evening when the liner material flattens.

    SENSOR claims 94% detection rate for breaks or holes, from 1 mm to 50mm or up to two inches. Most impressive was the device’s ability to detect a leak hidden under debris or under a second liner layer. SENSOR’s philosophy is “Zero Leakage”, a promise they have kept throughout Europe, Asia and the United Kingdom. Adoption of this new technology by Comanco gives us an advantage over our competition as there have only been 10 of these units sold in the US, including the three we purchased. Shortly, the new units will be deployed to the field for further testing and operation. If the demonstration witnessed today is any indicator, the rate of leaks identified during deployment will increase considerably. This does not replace air and vacuum box testing but is another tool to catch hard-to-find leaks.

    Our thanks to Bob, crew and Dr. Nosko for the demonstration.

     

    written by: Peter Vaka, Comanco

    www.comanco.com


    Sensor is ISO 14001:2004 certified, Bratislava, April 2015

     

    On the 10th of April 2015, Sensor has achieved another certification from ISO family.

    ISO 14001:2004 sets out the criteria for an environmental management system and can be certified to. It maps out a framework that a company or organization can follow to set up an effective environmental management system. It can be used by any organization regardless of its activity or sector.

    Using ISO 14001:2004 can provide assurance to company management and employees as well as external stakeholders that environmental impact is being measured and improved.


    SENSOR Achieves UK National Water Hygiene Acreditation, March 2015

     

    Demonstrating their knowledge and competence in of hygiene in the water industry, staff at Sensor have received certification under the National Water Hygiene Scheme (NWHS). 

    Dr Vladimir Nosko, CEO at Sensor, comments: "The emphasis of the scheme is to promote excellent hygiene practices within the water industry to protect the public health. We are delighted to announce our key survey and installation staff are now competent in this important area and in the future we will be seeking more potable water projects.”  

    Peter Bradley, trainer for the national water hygiene scheme of Achieve Safety Ltd, comments: “This Company is leading the way in following best practices and ensuring that their employees follow hygienic practices in the water industry.  It was apparent that they are keen to promote and enhance the best practices that create improvements in supply of safe drinking water.”


    Sensor at Geosynthetics 2015, Portland, OR, February 2015

     

    16th of February, 11.00-12.30 pm at Geosynthetics 2015, Portland, Sensor CEO - RNDr. Vladimir Nosko, PhD will deliver a technical presentation about geomembrane leak detection - Can the Holy Grail of the Geosynthetics Industry "Zero Leakage" be Achieved by Arc Testing?

    You're also welcome to visit our booth 206 where our representatives will be happy to help you with your enquiries.  

    Geosynthetics 2015 is a must-attend trade show for geotechnical, civil and geo-environmental communities. Co-located with the International Erosion Control Association Environmental Connection Conference, this is where the industry unites to share developments in geosynthetics engineering and technologies.

     


    V4 Going Global Conference, November 2014

    International conference about doing business in Japan, Moldava, Georgia and Albania organised by Slovak Business Agency and their partners. 

    RNDr. Vladimir Nosko, PhD., Sensor CEO was one of the key speakers at the conference talking about the successful Sensor projects in Japan and other countries.

    The event has been held thanks to support from the International Visegrad Fund, the ministry of Foreign and European Affairs of the Slovak Republic and the embassy of Japan in Bratislava. 


    Sensor at Finnmateria, Javäskylän, Finland, November 2014

    The leading exhibition for mining, metal processing, rock material industry and earth construction in Finland, FinnMateria 2014, offers the latest knowledge, technology and innovations.

    Sensor won't be missing and our representatives are looking forward to meet you there. You're welcome to visit our booth C229 where we will be with our partner company in Finland - SITO.


    Sensor at Accadueo, Bologna, Italy, October 2014

    Sensor will be present at the biggest water exhibition in Europe Accadueo 2014 held in Bologna, Italy from 22-24 October 2014. You're welcome to visit us at booth number D21, sector 29

    We are looking forward to see you there


    Sensor at Expomina, September 2014

    After four successful fairs, EXPOMINA PERU 2014, the largest mining exhibition of Lima, specializing in products and services for the mining industry, will be held from 10 to 12 September at the Centro de Exposiciones Jockey.

    Sensor won't be missing and our representatives are looking forward to meet you there. You're welcome to visit our booth A-191 and A-192.


    SENSOR in FORBES, August 2014

    Sensor in Forbes, August 2014
    8 pages of full Sensor story

    Sensor was asked to participate in an interview with the prestigious FORBES magazine. In the August 2014 issue of FORBES an 8 pages article was produced about Sensor describing the true story of its history and the path of its leak location services from conception in 1990 to the present day.

    The story is about a geophysicists RNDr. Vladimir Nosko, PhD and RNDr.Tomas Gregor, PhD. who together founded Sensor 24 years ago and since have developed sophisticated geomembrane leak location systems. 

    The english version of the article can be downloaded here


    Mining Expo 2014 award for SENSOR DDS
    From left: Slavo Spes, Erdenbulgan Oyun, Vladimir Nosko

    SENSOR DDS® - The Most Advanced Technology Award !

    Sensor is proud to announce that its SENSOR DDS® systems have been awarded as the most advanced technology at Mongolia Mining exposition 2014 held in Ulaanbataar.

    At the exhibition RNDr. Vladimir Nosko PhD. (Sensor's CEO) and Slavo Spes, MSc. (Head of Operations & Marketing) met Mongolian vice minister Mr.Erdenbulgan Oyun from Ministry of Mining in Mongolia where they discussed implementation of geomembrane leak detection systems to Mongolian mining industry. 'We want to protect our environment and we will do anything to prevent pollution of our country' Mr.Erdenbulgan said.

    We would like to thank everyone who visited us at our booth during days of exhibition and we are looking forward to projects ahead of us in Mongolia.


    Sensor & Microsoft

    In 2014 Sensor has become official Microsoft Partner


    The 4th edition of Mongolia Mining expo will be held for three days from April 10th – April 12th. Sensor will be there presenting its newest version of SENSOR DDS MIT as well as the other updates from its product line and services.

    You can visit us at booth number E08.


    Sensor has been awarded AA certificate of creditworthiness !

    Sensor is proud to announce that it has been awarded another certificate. This time its certificate of creditworthiness by Bisnode s.r.o. Only 5,8% of all Slovak companies are allowed to use the status AA as a symbol of the high credit rating. Our company has met the highest standards of reliability and stability in the international markets.


    Electrical Leak Location Arc Tester to Revolutionize Liner Quality

    Photo 1: Pinholes in a geomembrane installation can lead to significant action leakage rates…but those holes may be very difficult to find. New geoelectrical survey equipment has dramatically improved the ability to survey, locate and repair these holes, even in tanks and on geomembranes that lack conductive backings
    Photo 2: Outside view of geomembrane-lined tank
    Photo 3: Tank installer leak testing inside walls of geomembrane-lined tank with arc tester

     

    July 12, 2013

    By Abigail Beck, TRI Liner Integrity Services – New equipment has been developed that behaves like a spark tester, but doesn’t have to be performed on conductive-backed geomembrane.  It has the same requirements as the water puddle and water lance methods in terms of a conductive layer underlying the geomembrane, including soil.  It is not a spark tester, which is used exclusively on conductive-backed geomembrane; yet, it creates an electrical spark.

    The terminology invented to differentiate this new technology from its predecessors is the arc tester.  The arc tester can locate leaks even when there is a separation between the geomembrane and the underlying conductive layer of up to one inch, which ultimately makes it much more sensitive than the water-based methods.  This method has been used privately for over a decade in Europe, completely replacing the water puddle and water lance methods, and is now being offered commercially for the first time.

    On a side-by-side comparison to the water-based methods, the arc testing method wins out in almost every category.  The water-based leak location methods completely rely on a leaking geomembrane to detect leaks.  This means that in the few seconds that water is sprayed or pushed along the geomembrane, the water must go through the leak and make good contact with the subgrade.  There are plenty of leak types that won’t leak this quickly, like knife slits or pinholes.  The water-based methods can locate pinholes when conditions are good, but there are a handful of times when the methods have missed leaks due to the fact that the water could not flow through the geomembrane quickly or completely enough for detection.  A reliable size for detection using the water-based methods is a 1 mm diameter leak, as specified in the ASTM standards.  But pinhole leaks are not only a reality; they are a big problem for many geomembrane installations.

    One example where pinholes posed a huge problem is a landfill where the action leakage rate (ALR) is 5 gpad.  Typical conservative action leakage rates are in the range of 20 gpad, so 5 gpad is actually quite difficult to attain.  At this particular landfill, an electrical leak location survey was not performed during the installation of the geomembrane.  After the site exceeded its ALR, several dipole surveys were performed per ASTM D7007.  A handful of pinhole leaks were found, which were collectively creating the excessive leakage.  Typical dipole sensitivity is in the range of a 6.4 mm diameter leak, so after several surveys had been performed unsuccessfully, extreme (and very costly) measures were taken to increase the survey sensitivity in order to finally locate the leaks. The dipole method is simply not appropriate to locate pinhole leaks, which could have been located and repaired as part of geomembrane installation.  Water-based methods can commonly find pinhole leaks, but not reliably.

    PUTTING IT TO THE TEST

    A direct comparison test was organized between the water-based methods and the arc tester.  The comparison test took place at a very challenging exposed geomembrane survey site consisting of a corrugated metal tank lined with a PVC geomembrane, as shown in Photos 2 and 3.

    This site was yet another example where pinhole leaks were creating the difference between a successful project with a happy client and a problematic site.  This particular tank was only leaking about a litre of water every few hours, meaning that the leak was very small.  The small size of the leak and the lack of good contact between the loose PVC tank lining and the corrugated steel wall, separated by a cushion geotextile, made this one of the most challenging situations possible for the exposed geomembrane leak location methods.

    In the past, this tank installer hired a third party to locate a leak in one problematic installation, but the cost of hiring a third party with specialized equipment prompted the company to investigate equipment purchase options.    Since the water puddle method is not effective on extreme slopes and the client wanted to be able to test the side walls of his tank installations, the two equipment choices were the water lance and the arc tester.  The water dipole method could be used very effectively, but that method would require filling the tank with water, which can be costly and time-consuming when it is feasible at all.  Since I had not seen the arc tester in action first-hand, I could not give an honest evaluation of whether the water lance or arc testing method would better suit his application, so I proposed this comparison test.

    The tank installer welcomed the opportunity to compare two different sets of electrical leak location equipment in order to evaluate first-hand which method would be appropriate for his purposes.  The arc tester is not effective in the presence of water, so the plan was to perform the survey with the arc tester and then confirm whether or not the water lance could also detect the leak.  If both methods failed, then the tank would have to be filled with water in order to force water through the leaks and the water dipole method would be used as a last resort.

    The tank installer pointed out which wall he thought the leakage was coming from, based on which side of the exterior of the tank the leakage was reporting to.  Within about ten minutes, the arc tester had located a pinhole leak on the wall of the tank.  The water lance equipment was then set up to maximum sensitivity and the wall area was sprayed with water at a typical survey rate application.  No leak was registered by the water lance.  Since the known leak location had been circled on the wall of the tank as a result of the arc test, the water lance equipment was sprayed directly at the leak location.  There was still no signal.  The water lance conductive nozzle was then pressed directly onto the leak to force the geomembrane to come into close contact with the wall of the tank and finally a signal was registered.  It would be impractical to survey the entire installation with the nozzle pressed directly on every square centimeter of the survey area and the requirement for a continuous water source also made this method cumbersome.  It became obvious that the arc tester was the superior testing method for this application.

    After the direct comparison sold the arc testing equipment to the tank installer, the leak survey was continued along the walls and floor of the tank, where he located four more pinholes.  Photo 3 shows the tank installer using the arc testing equipment on the walls of the tank.

    CONSISTENTLY SUPERIOR RESULTS

    This is not news. Side-by-side comparisons between the water-based methods and the arc tester have been performed in front of clients and the outcome is always the same.  The arc tester has even been used to perform an electrical leak survey at a site where the water lance method had been previously employed.  The result was the location of a few hundred pinhole leaks that the water lance method had failed to pick up.

    One revolutionary aspect of this new technology is that it is very easy to operate.  In fact, after about five minutes of “training,” the tank installer was locating pinhole leaks like a pro.  The arc tester is a close cousin of the spark tester.  It has undergone about a decade more of evolution and field testing than the spark tester and is much easier to use.  The only equipment adjustment required is a knob that is set by the thickness of the liner to be tested.

    As J.P. Giroud stated during the Liner Integrity Panel discussion at Geosynthetics 2013, “All installed geomembrane liners should be subjected to an electric leak location survey.”  With the availability of this new arc testing equipment, this statement has the means of becoming a reality.  Damage incurred to the geomembrane during cover material placement is a completely different ballgame, but this is at least a step in the right direction.


     

             Sensor s.r.o. invites you to visit our booth at the biggest international exhibition for the mining industry EXPONOR 2013 held in Antofagasta, Chile from 17th - 21st June 2013.

             The International Exhibition of the Mining Industry, EXPONOR 2013, will bring together 1,000 exhibitors from 30 countries. It is organized by the Antofagasta Industrial Association.

             It includes technical tours to mining facilities, business round-tables with mining executives, seminars regarding investments in mining projects and technical talks, as well as visits
             by delegations of executives from mining companies and suppliers; international workshops with foreign mining executives and business networking for exhibitors from international
             and national pavilions.

             Geomembrane leak detection in the mining industry plays a key role in permenantly preventing environmental pollution. Sensor offers geomembrane leak detection systems either as
             one off surveys, or as 24/7 permanently monitored installations managed remotely by our office based engineers. 


     

            1 April - 4 April 2013 Sensor has proudly introduced the latest version of its SENSOR DDS® MIT system at the Geosynthetics 2013 symposium held in Long Beach California.

            On 3th of April 8.00-9.30am, the CEO of Sensor s.r.o. RNDr. Vladimir Nosko PhD.  delivered a technical presentation in the conference hall at Long Beach Convention Center 
            entitled Use of Electronic Leak Detection System in 24/7 On-Line Mode to Control Construction and Operation of Lined CAL Lagoons.

            We would like to thank everyone who has visited us in Long Beach at IFAI 2013, we look forward to doing business with you in the near future.