COULTER OMNISORP

COULTER^TM OMNISORP^TM Series
Gas Sorption Analyzers
State-of-the-art pore characterization.
Leaders in our field.
At Coulter Electronics, we are leaders in particle characterization. Our unique continuous volumetric method of gas sorption measurement, called the OMNISORP method, is a patented process* that is the result of more than ten years of research and development. This technique allows the user to develop virtually continuous, superior sorption data at a very high acquisition rate. OMNISORP analyzers can also be operated in the conventional static mode and are available with chemisorption capability as an option.
Applications.
OMNISORP Series Gas Sorption Analyzers have many applications in industrial, academic, and military laboratories. The instruments are especially useful for measuring surface area and determining pore size distribution of catalysts, zeolites, carbon blacks, ceramics, ion-exchange resins, membranes, polymers, powdered metals and other materials.
The OMNISORP method.
The OMNISORP method, or continuous volumetric method, used to determine adsorption and desorption isotherms is different from that used by competitive analyzers, though all are based on the principle of volumetric adsorption. There are several advantages to the use of this method over the conventional static volumetric technique.

Extended range of data acquisition.

Using the OMNISORP method, the adsorbate flow rate introduced into the sample holder is very low; therefore, the first date point obtained in adsorption is at a partial pressure three to four orders of magnitude lower than attainable with any other commercially available instruments. This extended range of data acquisition can provide critical insights into micropore characterizations down to 3Å radius and allows for a more detailed study of all samples.

Superior resolution.

Another major advantage of the OMNISORP method is its very high resolution. Since the isotherm is obtained in very small increments of pressure, pore size distribution peaks separated by as little as 2Å can be resolved. Up to 2000 data points per isotherm are generated. This type of detailed analysis is impossible with any other instrument.

Saving valuable time.
The OMNISORP method differs from other analyzers in its ability to generate sorption data at a very high acquisition rate. Because the adsorbate flows continuously, gas and sample are virtually in equilibrium at all times. On a sample-to-sample basis, it is possible to obtain complete isotherms in 30 to 50 percent less time than with other instruments. Typically, a high volume silica gel material that routinely takes 15 to 20 hours can be tested in 8 to 10 hours.
The Coulter Advantage.
With superior capabilities such as on-site training of your personnel and reliable technical support, Coulter has built its reputation on dedication to quality manufacturing and long-standing customer service. We confirm the suitability of our instrument for your application with a careful lab analysis of your sample. After purchase, the resources of Coulter laboratories worldwide remain as your technical support group for all our products.

Controls, Standards and Accessories

COULTER^TM OMNISORP^TM Series
Gas Sorption Analyzers
State-of-the-art pore characterization.
Leaders in our field. At Coulter Electronics, we are leaders in particle characterization. Our unique continuous volumetric method of gas sorption measurement, called the OMNISORP method, is a patented process* that is the result of more than ten years of research and development. This technique allows the user to develop virtually continuous, superior sorption data at a very high acquisition rate. OMNISORP analyzers can also be operated in the conventional static mode and are available with chemisorption capability as an option. Applications. OMNISORP Series Gas Sorption Analyzers have many applications in industrial, academic, and military laboratories. The instruments are especially useful for measuring surface area and determining pore size distribution of catalysts, zeolites, carbon blacks, ceramics, ion-exchange resins, membranes, polymers, powdered metals and other materials. The OMNISORP method. The OMNISORP method, or continuous volumetric method, used to determine adsorption and desorption isotherms is different from that used by competitive analyzers, though all are based on the principle of volumetric adsorption. There are several advantages to the use of this method over the conventional static volumetric technique. Extended range of data acquisition. Using the OMNISORP method, the adsorbate flow rate introduced into the sample holder is very low; therefore, the first date point obtained in adsorption is at a partial pressure three to four orders of magnitude lower than attainable with any other commercially available instruments. This extended range of data acquisition can provide critical insights into micropore characterizations down to 3Å radius and allows for a more detailed study of all samples. Superior resolution. Another major advantage of the OMNISORP method is its very high resolution. Since the isotherm is obtained in very small increments of pressure, pore size distribution peaks separated by as little as 2Å can be resolved. Up to 2000 data points per isotherm are generated. This type of detailed analysis is impossible with any other instrument. Saving valuable time. The OMNISORP method differs from other analyzers in its ability to generate sorption data at a very high acquisition rate. Because the adsorbate flows continuously, gas and sample are virtually in equilibrium at all times. On a sample-to-sample basis, it is possible to obtain complete isotherms in 30 to 50 percent less time than with other instruments. Typically, a high volume silica gel material that routinely takes 15 to 20 hours can be tested in 8 to 10 hours. The Coulter Advantage. With superior capabilities such as on-site training of your personnel and reliable technical support, Coulter has built its reputation on dedication to quality manufacturing and long-standing customer service. We confirm the suitability of our instrument for your application with a careful lab analysis of your sample. After purchase, the resources of Coulter laboratories worldwide remain as your technical support group for all our products.

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CD ROM Vol 2 was produced by staff at the Purdue University Cytometry Laboratories and distributed free of charge as an educational service to the cytometry community. If you have any comments please direct them to Dr. J. Paul Robinson, Professor & Director, PUCL, Purdue University, West Lafayette, IN 47907. Phone:(317) 494-0757; FAX (317) 494-0517; Web http://www.cyto.purdue.edu EMAIL robinson@flowcyt.cyto.purdue.edu