Chemicals Densometers and Porosimeters
Description
Densometers and porosimeters are instruments used to test the air permeability of materials. A densometer measures the time it takes to force a known volume of air through a specific area of material, while a porosimeter measures the flow of air in cubic feet per minute that passes through a square foot of the material. These devices are essential for assessing the porosity and permeability of various substances, particularly in industries dealing with woven textiles, plastics, and other industrial fabrics .
Working Principle
Densometers operate by determining the time required to drive a fixed, known volume of air through a sample. This measurement provides insights into the material's air-permeability or air resistance. Porosimeters, on the other hand, often use mercury in a high-pressure environment to gauge the porosity and permeability of materials. The penetration of mercury into the pores is tracked by changes in electrical capacitance, which helps calculate pore diameters and volumes .
Applications
Densometers and porosimeters are widely used in industries that manufacture woven textiles and plastics, such as felt or other industrial fabrics. They are also employed in the oil and gas industries to test the porosity of petroleum reservoirs. In the pulp and paper industry, densometers are used for measuring the porosity and air-permeability of paper and other sheet-like materials .
Advantages over other Densometers and Porosimeters
Modern densometers and porosimeters, such as those using oil-filled pressure systems, offer advantages over older models like mercury densometers. These newer devices are more environmentally friendly and safer to use, as they avoid the use of toxic mercury. Additionally, nuclear densometers provide the unique capability of testing for moisture in soil and can produce readings through multiple layers of asphalt, offering versatility in various testing environments .
Limitations
One limitation of traditional porosimeters is the use of mercury, which poses environmental and health risks. Additionally, the accuracy of measurements can be affected by the complexity of the sample's pore structure, which may lead to challenges in interpreting results accurately .
Considerations
When selecting densometers and porosimeters, it is important to consider initial costs, operating expenses, and maintenance requirements. Devices that use mercury may have higher disposal and handling costs due to environmental regulations. In contrast, newer models that avoid mercury may offer lower long-term costs and increased safety. Durability and accuracy are also critical factors, as these instruments need to provide reliable measurements over time. Regular maintenance and calibration are necessary to ensure continued accuracy and performance .
from Micromeritics
High Performance in a Compact Footprint. Accurate and precise surface area and porosimetry measurements are essential to the determination of the effectiveness and quality of a wide variety of materials. The Micromeritics ASAP 2020 integrates multiple gas sorption techniques into a single,... [See More]
- Test Media: Adhesives/Sealants; Ceramics; Chemicals; Food / Beverage; Metals; Powders; Catalyst
- Methods, Technology & Standards: Gas Sorption Technique
- Properties Analyzed: Porosimetry / Pore Volume
- Display & Special Features: Benchtop or Laboratory; PC Interface / Networkable
from Micromeritics
Micromeritics ASAP ® 2420 Accelerated Surface Area and Porosimetry System uses the gas sorption technique to generate high-quality data for applications that require high performance/high sample throughput. Standard features include six independently operated analysis ports and a programmable... [See More]
- Test Media: Adhesives/Sealants; Ceramics; Chemicals; Food / Beverage; Geological (Rock, Strata, etc.); Metals; Powders; Catalyst
- Methods, Technology & Standards: Gas Sorption Technique
- Properties Analyzed: Porosimetry / Pore Volume
- Display & Special Features: Benchtop or Laboratory; PC Interface / Networkable
from Micromeritics
he mercury porosimetry analysis technique is based on the intrusion of mercury into a porous structure under stringently controlled pressures. Besides offering speed, accuracy, and a wide measurement range, mercury porosimetry permits you to calculate numerous sample properties such as pore size... [See More]
- Test Media: Building & Construction Materials; Ceramics; Chemicals; Concrete/Mortar; Food / Beverage; Foam / Porous Materials; Geological (Rock, Strata, etc.); Metals; Powders; Catalyst
- Methods, Technology & Standards: Mercury Porosimetry
- Properties Analyzed: Densometry / Pore Size
- Display & Special Features: Benchtop or Laboratory; PC Interface / Networkable
from Micromeritics
Micromeritics' AutoPore IV 9500 Series characterizes a material ’s porosity by applying various levels of pressure to a sample immersed in mercury. The pressure required to intrude mercury into the sample ’s pores is inversely proportional to the size of the pores. This is called mercury... [See More]
- Test Media: Building & Construction Materials; Ceramics; Chemicals; Concrete/Mortar; Food / Beverage; Foam / Porous Materials; Geological (Rock, Strata, etc.); Metals; Powders; Catalyst
- Methods, Technology & Standards: Mercury Porosimetry
- Properties Analyzed: Densometry / Pore Size
- Display & Special Features: Benchtop or Laboratory; PC Interface / Networkable
from Micromeritics
The ASAP 2460 Surface Area and Porosity Analyzer incorporates a unique expandable system designed for high-performance and high sample throughput. The base ASAP 2460 is a two-port master control unit. For more throughput, additional two-port units can be connected to the master unit expanding the... [See More]
- Test Media: Adhesives/Sealants; Ceramics; Chemicals; Food / Beverage; Geological (Rock, Strata, etc.); Metals; Powders; Catalyst
- Methods, Technology & Standards: Gas Sorption Technique
- Properties Analyzed: Porosimetry / Pore Volume
- Display & Special Features: Benchtop or Laboratory; PC Interface / Networkable