SPECIAL NOTICE
99 -- 1 - ZEN3602 Light Scattering Instrument Package, to include ZEN1002 Cell Kit, Dell Mini Tower, Color Printer, Viscometer Package, Research Software and accessories.
- Notice Date
- 1/15/2009
- Notice Type
- Special Notice
- NAICS
- 334516
— Analytical Laboratory Instrument Manufacturing
- Contracting Office
- Department of the Army, U. S. Army Materiel Command, RDECOM Acquisition Center - Natick, RDECOM Acquisition Center - Natick, ATTN: AMSRD-ACC-N, Natick Contracting Division (R and BaseOPS), Building 1, Kansas Street, Natick, MA 01760-5011
- ZIP Code
- 01760-5011
- Solicitation Number
- W91A2K-9008-1023
- Archive Date
- 4/15/2009
- Point of Contact
- greg.n.wilson, 508 233-4161<br />
- Small Business Set-Aside
- N/A
- Description
- Under the authority of FAR 13.5, the U.S. Army, REDCOM, Natick Contracting Division, Kansas Street, Natick, MA on behalf of the United States Army Soldier System Center, Natick, intends to negotiate a purchase order to Malvern Instruments, Inc 117 Flanders Road, Westborough, MA. 0158102035. This is for the purchase of ZEN3602 Light Scattering Instrument Package. Malvern Instruments is the only Company that can meet the following requirements. 1.The backscatter optics. At 173 backscatter, the volume observed is about 8 times the volume observed with 90degree scattering optics. This gives 8 times the detected count rate. This improvement relates directly to improved sensitivity. 2.The fiber detection system. The fiber detection optics ensure that the Signal/Background ratio or more correctly, the Intercept, is not degraded at these high detection volumes as it would with 'classical' optics. Increasing the count rate while simultaneously reducing the intercept is of little value. 3.The high efficiency detector. A high efficiency avalanche photodiode detector (APD), specially selected for dynamic light scattering applications is used, giving typically ten to fifteen times the efficiency of a photomultiplier, and hence ten to fifteen times the sensitivity. There are currently no other systems that use a backscatter configuration that have a high efficiency APD. 4.The patented optics. The design of the optics means that losses in the light collected are minimized. 5.The suppression of 'noise'. Sensitivity is not all about count rate, for example heterodyne backscatter systems have a very high count rate but low sensitivity. This is because most of the count rate in a heterodyne system is a reference signal that does not contribute to the data. What is as important as the count rate is the suppression of noise or flare, so that all the photons detected contribute to the data. There are a number of ways this is done in the ZETASIZER NANO SERIES: "Suppression of reflections in the optics set up, including the tilting of the sample cell. "Optimizing the Signal/Noise automatically, by moving the cell to the optimum position to maximize the Intercept and the count rate. "Using symmetrical normalization in the correlator. This compensates for the statistical fluctuations between channels as the count rate varies, and gives a more reliable value for each channel. This achieves the same data quality in a shorter time, or conversely better data over an equivalent time. "Stabilization of the optics and electronics, so that count rates only 50% in excess of the count rate obtained from the dispersant are high enough to enable a measurement to be made. "Use of a He-Ne laser gives an exceptionally low noise stable source, with an excellent polarization ratio and mode stability. 6.The high concentration capability. If we define 'Sensitivity' at high sizes, i.e. particles over a micron, as meaning the ability to measure a precise size, then the higher measurement volume, and being able to measure at higher concentrations, reduces number fluctuations, and improves the result accuracy and precision dramatically. Questions concerning this acquisition may be addressed to the above address, Attention: Mr. Greg Wilson (AMSRD-ACC-NS) or by greg.n.wilson@us.army.mil. This synopsis expires Janurary 22, 2008 at 8:00 am local time.
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- Record
- SN01733232-W 20090117/090115215812-d15d742facb691c1aca31476442fbcf2 (fbodaily.com)
- Source
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