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and technical articles
in week 40/2008:


New Moisture in Liquid EExd Certified On-line Analyser
 
Moisture in Liquid EExd Certified On-line AnalyserMichell Instruments new LIQUIDEW EExd moisture in liquid on-line analyser will be presented for the first time in the Middle East by Bin Saud Technical Trading at Adipec (stand H77/66). LIQUIDEW EExd is a purpose designed flameproof certified solution to on-line continuous moisture measurement for petrochemical liquid applications. The instrument is designed to be wholly installed in the hazardous area, so simplifying site installation and retrofits. Moisture content is determined in part per million by weight (ppmw) through Henry’s Law calculation. The method utilizes the measured dew point temperature, the liquid temperature and values from a pre-programmed extensive list of saturation concentration data for a variety of petrochemical liquids. For cases where customised liquid characteristics data are required, they can be entered quickly and easily by the user. LIQUIDEW EExd is certified as flameproof for use in IEC Zone 1 and 2/NEC Class 1 Div. 1 and 2 hazardous areas. The Main unit (electronics and sensor) together with the associated sampling system may be mounted at ...





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PR4404 - 1V Boost Driver for Power LEDs
 
PR4404 - 1V Boost Driver for Power LEDsCustom-specific solutions (ASICs) and production of mixed-signal ICs are the main focus of PREMA Semiconductor GmbH. Their product range is growing continuously, particularly by buck and boost LED drivers. The new PR4404 is a LED driver providing more than 150mA out of one battery cell and up to 300mA from two batteries for one to three power LEDs. A hold input allows controlling the LED brightness via a PWM signal or switching the LED from a microcontroller. You need only a few components to realize applications like flash lights, blinking lights or LCD backlighting in a cost-efficient way with small board sizes. Several applications and circuits can be found in the comprehensive data sheet on ...





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New cooled mirror hygrometer for anti-icing systems of gas turbines
 
Optidew cooled mirror hygrometerThe new generation of the Optidew Hygrometer from Michell Instruments was designed especially for applications in anti-icing systems for stationary gas turbines. In power generation plants located in environments with low temperatures and high relative humidity, there is a risk of ice forming in the air intake systems, leading to many potential problems. Firstly the accumulation of ice on the filter elements will block the filter and lead to loss of power through a drop of pressure and reduced mass flow. In turn this will lead to reduced thermal efficiency. In extreme cases, chunks of ice may be ingested into the compressor and cause physical damage to the turbine. Protecting against icing is vital to prolonging the life and efficiency of the gas turbine. Ice protection systems vary between de-icing and anti-icing, the latter usually featuring a precision hygrometer such as the new Optidew for Anti-icing Systems. Applying the fundamental cooled-mirror measurement principle, it delivers a repeatable, drift-free dew point or relative humidity measurement. The robust design of the new Optidew hygrometer ...





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Easy to use stainless steel VeriSens® vision sensors are now available for the most demanding operating conditions
 
Baumer VeriSens® vision sensorsBaumer Electric: The powerful and compact Baumer VeriSens® vision sensors are now also available in stainless steel housings with protection class IP 69K. As a result, VeriSens® vision sensors can be used without an expensive protective housing in applications in the food and beverage, cosmetic, and pharmaceutical industries. The VeriSens® vision sensors comply with the rigid hygiene and cleaning cycle requirements customary in these applications. In this version VeriSens® is equipped with stainless steel housing, shatterproof glass, special connectors and seals certified for use in the food industry. This gives the user the confidence that these sensors comply with all the requirements of the demanding applications. Reliable operation is provided even under varying lighting conditions. The vision sensors are capable of storing and switching between 255 different inspection tasks. Also in the stainless steel version the VeriSens® is characterized by ease of use and reliable operation even under demanding environmental conditions. ...





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4B Rotech Encoder
 
4B Rotech EncoderThe 4B Rotech Encoder is used primarily for protecting equipment and personnel from dangerous underspeed / belt slip conditions. Other applications include accurate speed control, direction of rotation detection, gate position indication and counting the number of revolutions of the shaft. An inductive sensing device in the body of the encoder detects a steel rotor. On slow speed or accurate position control, a photo diode detects the slots on a steel disk. One pulse is created for each rotor or slot so the unit can be connected directly to a PLC/computer or 4B control module. The shaft to be monitored is drilled and taped to take the M12 Rotech Bolt. No guards are required as the rotating components are encased inside the aluminium housing of the encoder. No brackets are required as the encoder couples directly to the end of the shaft and floats with the shaft. Polyester and stainless steel versions are also available for offshore and other highly corrosive applications." ...





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Enhancements announced for Cognex VisionView, Adjusting parameters without a PC on deployed In-Sight vision systems is now possible
 
Production line operators can now closely monitor and quickly adjust their In-Sight® vision systems with the VisionView™ touch screen operator interface panel from CognexVersatility, simplicity, and flexibility …. that’s VisionView™. This low-cost operator display panel for Cognex In-Sight® vision systems has been enhanced with an array of new features. It is now easier than ever to monitor the production process and change vision system parameters right on the factory floor…without a PC. Both engineers and production line operators will benefit from the new software enhancements in VisionView 1.1. Engineers can now create an operator interface from within the In-Sight Explorer software by simply choosing the vision system parameters they would like to display, and selecting those that can be modified on the factory floor. A deployment interface is then automatically generated by VisionView. Production line operators can now quickly adjust the parameters of the In-Sight job, such as training new parts or entering new lot codes, all via the password-protected VisionView touch screen controls…without ever having to use a PC. This saves valuable time, especially when changing over the line from making one product to another. Password protection can be applied to critical parameters so that only certain users are able to modify them, preventing unauthorized interruptions to critical ...





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Rubber thickness measurement using Acuity laser sensors
 
Acuity laser sensors are used throughout the tire and rubber manufacturing industries. Rubber sheet manufacturers need online thickness measurements for Quality Control and system control feedback loops. Rubber presents several challenges for non-contact metrology equipment with its low surface reflectivity, dirty measuring environments and elevated material temperatures. System integrators for the tire and rubber industry demand reliable, non-contact measuring devices to minimize downtime and scrap material production. Rubber conveyor belt manufacturers use Acuity laser displacement sensors to measure the thickness of black rubber sheet in a calendaring process. After numerous trials and worldwide installations the AccuRange 700-4 sensor model was chosen to replace other equipment which failed to meet accuracy and speed requirements. The AR700 sensor is extremely durable and meets the environmental requirements for this industrial application. During calendaring and rubber processing, the surface of the rubber sheet may be very shiny and very black, creating challenging conditions where little light can be reflected back to a sensor’s detector. Acuity installs an upgraded laser diode in their rubber thickness measurement sensors, bringing 5 mW of laser power (standard is 1 mW) to get a stronger return signal off the dark surface. The increased power with Acuity’s patented optics, results in excellent sensitivity on the rubber sheet and fast measurement speeds. ...





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Sensors & Measurement News in week 39 '2008    <<   >>  Sensors & Measurement News in week 41 '2008


 

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