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Environmental Laboratory Photodiodes that give Good Performance at a Reasonable Cost


Laser Components (USA) designs and manufactures InGaAs photodiodes in house in Tempe, Arizona. The detectors include InGaAs and extended InGaAs photodiodes with the following spectral ranges: IG17 series (500-1700nm), IG22 series (500-2200nm) and the IG26 series (500-2600nm).


Active area sizes are from 0.25mm to 3mm with standards of 0.25mm, 1mm, 2mm and 3mm. There is also a special size of 1.3mm in diameter; this unique size is small enough to be packaged into a TO-46 can, with 5.3mm base diameter, one could then drop this in-place of a 1mm InGaAs and get approximately 70% more signal, depending on the spot size. The D(star) detectivity is considerably better and QE is 15% higher, when compared side-by-side to equivalents to those from other key manufacturers currently on the market. It is great when you can upgrade a system by simply “dropping in” a superior pin-for-pin replacement; extending the life-span of your system without the need for a costly whole re-design, and to address those customers who demand higher performance levels - performance can often hinge on one component alone.


The prices are competitive and often lower than many currently available InGaAs photodiodes on the market.


Other key features include, lower temperature coefficient, package options including peltier cooled, ceramic mounted, SMD. Main applications include: spectroscopy, laser monitoring, non-contact temperature measurement, tunable diode laser spectroscopy (TDLS), spectrophotometry, sorting applications and flame regulation 28723pr@reply-direct.com


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Measuring Surface Free Energy in a Second with Only One Click


At analytica 2014 in Munich, KRÜSS (Germany) presented the newly developed Mobile Surface Analyser MSA for the first time. The instruments measures wettability based on the contact angle with two test liquids simultaneously and fully automated using the innovative “One-Click SFE” method. Reliable values for the two contact angles, the surface free energy of the sample and its polar part are available within one second. The result enables well- founded statements about wettability by aqueous or organic liquids, e.g. for coatings processes. KRÜSS has three patent applications for new technologies in the MSA.


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Simultaneous dosing and analysis of two drops obviates the need to change the test liquid during the material testing, as is the case with conventional dosing units. The dosing


system is specially developed by KRÜSS. It doses two parallel drops within milliseconds, with high volume precision and minimal kinetic


energy. In spite of its high speed, the procedure uses a gentle way of placing a drop with a dosing needle. The contactless method, without the usual dosing needles, prevents undesirable contact with the sample and possible damage or contamination of the probe.


Cartridges filled with the test liquids – usually water (polar) and diiodomethane (non-polar) – ensure that the dosing operation is easy to handle. Furthermore, an alternative dosing solution was created for liquids which require extensive cleaning effort such as adhesives, inks or paints. The dosing system can be changed to an automatic piston syringe module within two minutes, which uses conventional disposable syringes. Due to its use with a notebook and USB power connection, as well as its low weight and small footprint, the MSA is specially designed for mobile and non-destructive quality control. The instrument measures samples of any size, such as automobile bodies, and provides reliable values, even for vertical surfaces such as shower walls and for convex surfaces.


The modern, intuitive software automatically calculates the surface free energy based on proven and meaningful scientific models. For example, precise information relating to the polarity of the surface provides a reliable indication of the effect of activation by such methods as plasma treatment. Thanks to the simple measuring sequence and the software’s clear user guidance, measurement errors due to incorrect operation are virtually ruled out.


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Reduction in Calibration Uncertainty has Top Laboratory Priority


The UKAS laboratory at Rotronic (Switzerland) has long made a name for itself in high quality calibrations and, thanks to constant improvements in measurement procedures, is growing into one of the most advanced commercial facilities in this specialised field.


The ISO 17025 accredited calibration of humidity and temperature sensors and dew point instruments confirms performance and is increasingly a requirement of industry regulations and company quality management systems. The UKAS laboratory at Rotronic UK has spent the last two years increasing confidence in the calibrations performed and as a consequence lowering the Calibration and Measurement Capability (CMC) of the laboratory. Significant improvements have been made in the measurement procedures for dewpoint and temperature in air, enabling the following projected CMC’s in future: Dew/ Frost point measurement (°Cdp/fp): -60 to -40 °Cfp; uncertainty ±0.15 °Cfp (currently ±0.30 to ±0.22 °Cfp); -40 °Cfp to +60 °Cdp; uncertainty±0.11 °Cdp (currently ±0.22 to ±0.30 °Cdp) and +60 °Cdp to 70 °Cdp; uncertainty±0.13 °Cdp (currently ±0.30 °Cdp).


Temperature in air/ °C; 0 °C to +70 °C; uncertainty ±0.05 °C (currently ±0.17 to ±0.26 °C).


In the laboratory RH is derived from vapour pressure formulations. Improvements in dew point and temperature in air CMC ‘s therefore affect the RH CMC’s profoundly. The projected improvement lies in the range 0 to 70 °C; in the worst case RH CMCwill be ±1 %rh. In all parts of the HC2-S specified range covered by the accreditation the CMC is projected to be better than the specification of the probe. This is the first time this has been achieved.


Within the next 12 months the temperaturein air range will be extended from -60 °C to+150 °C, with a projected CMC at <±0.1 °C.The dew/frost point measurement rangewill go down to -90 °Cdp and up to +90 °Cdp in combination with RH calibrationin an extended range up to 90 °C and95 %rh.


For example, at the new upper limit of 90 °C/95 %rh the projected CMC is anticipated to be <±2 %rh and with these levels of calibration measurement uncertainty and range of accredited calibration services, the purpose-built calibration laboratory at Rotronic UK will be one of the most advanced commercial facilities in the world.


INTRODUCING


Supelco Ionic Liquid GC Columns


• Anti-oxidant/anti-ware additives from hydrocarbons in lubricants


• FAMEs from hydrocarbons in blended biodiesel


To learn more about this innovative star product, visit


©2013 Sigma-Aldrich Co. LLC. All rights reserved. SIGMA-ALDRICH and SUPELCO are trademarks of Sigma-Aldrich Co. LLC, registered in the US and other countries. Supelco brand products are sold through Sigma-Aldrich, Inc.


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IET March / April 2014 www.envirotech-online.com


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sigma-aldrich.com/il-gc 11648


New Module for Speciation of Trace Metals The speciation of trace metals is becoming


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For Petrochemical Separations of Compound Classes


• Benzene and other aromatics from aliphatics in gasoline


increasingly important because of the toxicity between species varies so greatly. Mercury and the hydride forming elements are of particular interest because of their high toxicity and tendency to bio-accumulate in the food chain and ultimately affect human health. Recognising this need, PS Analytical (UK) have developed the 10.820 speciation unit. The module has been designed to couple to our cold vapour/hydride generation Millennium AFS systems and SAMS chromatography software. The system includes a fully automated LC pump with injection valve to provide a LC/IC separation of the inorganic and organometallic species. The eluting species are then subjected to UV photolysis/heater module to breakdown the organometallic and to ensure that the optimalvalance state is achieved for hydride generation. The AFS approach with the 10.820 module offers a complete solution for speciation with sub ppb detection limits for each species.


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11648_Innovative_Origami_Ad_Petro_Industry_News.indd 1 2026ad@reply-direct.com 1/22/2013 4:46:35 PM


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