Dynamic Sampling Accessories Provide Measurement Consistency

Ocean Optics spectroscopy tools ideally suited to inhomogeneous samples

Ocean Optics has introduced a line of spectroscopy accessories that makes dynamic sampling measurements simple and reliable for both solid and liquid samples. Dynamic sampling is a technique where rotational or linear motion is used to measure an “average” signal across the sample, removing localised variance from results and improving measurements of inhomogeneous and irregular samples such as grains, feed and soil.

Ocean Optics offers four dynamic sampling accessories – a diffuse reflectance probe, rotating sampling cup, multiplexer and flow cell – that fit seamlessly with existing UV-Vis and NIR spectrometers and accessories, resulting in a system optimised for the user’s application. Dynamic sampling accessories are ideal for users who take routine measurements of the same sample types or need to measure a large number of different samples frequently.

The Diffuse Reflectance Probe (DR Probe) integrates a light source and collection optics into one unit to measure 45° diffuse reflectance. It is ideal for applications such as colour analysis, material identification and quality monitoring of foods. The DR Probe has rugged, all-metal construction with 40 mm focal length and an integrated, 10,000-hour bulb for extended time between servicing.

Also available for diffuse reflectance measurements is the DynaCup, a rotating device that presents samples to the DR Probe. The rotation allows the probe to scan the sample multiple times to collect a more consistent, representative spectrum of the sample. This method is important with inhomogeneous samples like grains, where variables such as shape, moisture and starch distribution within kernels can vary greatly.

To save sample measurement time and streamline sample processing, the multiplexer accessory is a mechanical actuator that distributes light through 10 customisable channels from a single light source. The multiplexer is useful for any kind of light transmission and optical fibre size. Two models offer a choice between fast positioning, or high repeatability and accuracy of performance. The multiplexer features SMA 905 connections and a USB port for communication and remote control.

For flow applications users can select the DynaFlux, an integrated transmission and absorbance flow cell. DynaFlux accepts standard transmission cells with pathlengths up to 10 mm (sold separately) and a temperature controlled sampling chamber. A programmable timer allows the flow cell pump to run for fixed times with options for continuous flow to analyse large volumes, or stop-flow mode to analyse static samples. DynaFlux is an all-in-one accessory for dynamic sampling of liquids, for both NIR and UV-Vis transmissive measurements.

To learn more about Ocean Optics dynamic sampling accessories, please contact an Ocean Optics Applications Scientist at info@oceanoptics.com, visit the website at www.OceanOptics.com.

About Ocean Optics:
Headquartered in Dunedin, Fla., Ocean Optics (a Halma company) is a leading supplier of solutions for optical sensing – fundamental methods of measuring and interpreting the interaction of light with matter. With locations in the Americas, Europe and Asia, the company has sold more than 200,000 spectrometers worldwide since 1992. Ocean Optics’ extensive line of complementary technologies includes chemical sensors, analytical instrumentation, optical fibers, metrology products and optics. Ocean Optics is a subsidiary of Halma plc, an international market leader in safety, health and sensor technology.
View Ocean Optic’s press release archive at: http://halmapr.com/news/oceanoptics/

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BASIS™ Mass Flow Controllers Provide Reliable Gas Flow Control for OEM and Process Use

Compact units deliver fast, accurate flow rate control

Alicat Scientific has added a new line of mass flow controllers specifically for original equipment manufacture and process integration. BASIS™ is Alicat’s smallest footprint instrument, providing fast, accurate control of gas flow rates in an economical, easy-to-integrate package. BASIS is ideal for use in OEM gas analyzers, automated gas mixing on process lines, and anywhere basic mass flow-only control is required.

Alicat_Basis

Stocked and ready for quick ship on evaluation orders, all BASIS units are ready to control process flows at full accuracy in just 70 ms. A 100 ms control response enables BASIS to react in real time to upstream fluctuations. NIST-traceable accuracy is +/-(1.5% of the reading + 0.5% full-scale).

BASIS is available with the following multi-gas calibrations: Air, Ar, CO2, N2, O2, N2O (selectable over RS-485); He, H2 are also available in single-gas units. Dual communications – RS-485 Serial and 0-Vdc analog – mean BASIS can be built into a range of end-user products. For process applications, the availability of analog and digital feedback allows for both PLC and PC control options.

To learn more about Alicat new BASIS mass flow meters, visit www.alicat.com/basis, or contact Gajendra Kelkar on 0 99300 47455 or email gkelkar@alicat.com

To find an archive of Alicat news, visit the Alicat News Blog at http://www.alicat.com/alicat-blog/

About Alicat Scientfic:
Part of the international Halma group, Alicat Scientific designs and manufactures mass flow devices used in medical and scientific instrumentation, as well as diverse industrial applications, for high-precision measurement of gas and liquid flows. Its all-digital product range includes mass and liquid flow meters and controllers; pressure gauges and controllers; portable flow meters; secondary calibration standards; software and accessories.

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