Thermo Scientific™

Evolution™ ISA-220 Integrating Sphere 1 Inch Calibrated Diffuse Reflectance Standard

Catalog number: 268-835600
Thermo Scientific™

Evolution™ ISA-220 Integrating Sphere 1 Inch Calibrated Diffuse Reflectance Standard

Catalog number: 268-835600
Solve your toughest sample measurement problems with the Thermo Scientific™ Evolution™ ISA-220 Integrating Sphere Accessory. This highly efficient accessory measures scattering solids by reflectance and scattering solutions by transmittance.  Made from Spectralon™, the quality standard in diffuse reflectance coatings, this 60mm diameter integrating sphere delivers measurement performance to 2A (1%T or 1%R) and beyond, matching or exceeding the measurement range of larger spheres costing much more. Refractory solids, films and translucent solids can be measured directly using standard clamps. 
 
Catalog Number
268-835600
Unit Size
Each
Description
1 Inch Calibrated Diffuse Reflectance Standard
Price (USD)
Full specifications
Description1 Inch Calibrated Diffuse Reflectance Standard
For Use With (Equipment)ISA-220 Integrating Sphere Accessory
Use1 inch diameter calibrated Spectralon™ disc. Used to establish a calibrated 100% T baseline for high accuracy or pseudo-absolute reflectance measurements. The reflectance of Spectralon is slightly less than 100%. Upload the calibration file that ships with this piece and the instrument will take its reflectance at each wavelength not as 100% but as the calibration value.
Unit SizeEach
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Catalog NumberSpecificationsUnit SizeDescriptionPrice (USD)
268-835600Full specifications
Each1 Inch Calibrated Diffuse Reflectance StandardRequest A Quote
Description1 Inch Calibrated Diffuse Reflectance Standard
For Use With (Equipment)ISA-220 Integrating Sphere Accessory
Use1 inch diameter calibrated Spectralon™ disc. Used to establish a calibrated 100% T baseline for high accuracy or pseudo-absolute reflectance measurements. The reflectance of Spectralon is slightly less than 100%. Upload the calibration file that ships with this piece and the instrument will take its reflectance at each wavelength not as 100% but as the calibration value.
Unit SizeEach
Showing 1 of 1

Measuring scattering solutions

Solutions with suspended particles, even particles too small to see with the naked eye, will scatter light at all wavelengths in addition to any electronic absorbance associated with the species in solution that you want to analyze.  This scattering attenuates the beam, so the measured transmittance is lower (absorbance is higher) than the “true” value for the analyte.  In a conventional cuvette experiment most of the light that scatters away from the axis of the beam does not reach the detector.  With an integrating sphere directly behind the sample nearly all of the forward scattered light enters the sphere where the photons bounce around until they strike the detector and are measured as transmitted light.  With the ISA-220 accessory, your measurements of scattering solutions become more accurate, more reproducible, and far less dependent on the distribution of particle sizes in solution than they would be in a simple cuvette experiment.


Measuring scattering solids

How much light of a particular wavelength passes through your container wall?  How effective is your UV-absorbing coating or additive?  If you measure a scattering solid without an integrating sphere, you only measure the photons that pass through the material and stay on-axis.  The result is that you get an artificially low reading of the total transmittance.  For highly scattering container walls, the error can be as large as 1000x!  Choose the ISA-220 to measure how much light really passes through your material.


Refractory solids

If your material is a monolithic solid the only way to measure its electronic absorption properties is to reflect photons off it.  In such a case, an integrating sphere is the only option.  Light reflected at all angles is captured and measured by the sphere. Thermo Scientific™ INSIGHT™ software for the hermo Scientific™ Evolution™ 220 can measure directly in Kubelka-Munk units to help simplify your studies of electronic structure.  If you need to measure the color of an object you can do this too.  Simply scan it across the appropriate range for the color scale of your choice and use our VISIONlite ColorCalc software to calculate the color parameters you need.


Powders

Choose the ISA-220 powder cell holder and you need only 0.5 cc of material to make your measurement.  The powder cell holder comes with a reference cell filled with a Spectralon plug and a sample cell where a spring and piston design carefully compresses your finely ground sample for accurate measurement.

 

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