High-flow rate, low-noise, gas sampling apparatus and methods for collecting particulate in a gas
a gas sampling and high-flow rate technology, applied in the field of gas sampling apparatus and methods for collecting and detecting particulate in gas, can solve the problems of noisy vacuum pump and filter blockag
Inactive Publication Date: 2006-06-08
THERMO ENVIRONMENTAL INSTR
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Benefits of technology
The apparatus effectively collects and detects particulate and radioactive materials with improved flow rates and reduced noise, enabling efficient sampling and monitoring while being compact and power-efficient, suitable for various environments.
Problems solved by technology
Limitations with such conventional gas samplers for collecting particulate include the vacuum pump generally producing a low flow rate of gas to be sampled, the filter becoming clogged, and the vacuum pump being noisy.
Method used
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[0023] As described in greater detail below, the various high-flow rate, low-noise, gas sampling apparatus in accordance with the present invention allow collection and detection of particulate or aerosol such as biological, chemical, and nuclear material and may be configured as a compact, unobtrusive, portable, lightweight apparatus for use in various indoor or outdoor locations. The ability of the apparatus to provide a high flow rate of gas to be sampled allows forming a concentrated sample particularly of small biological material such as anthrax or radioactive material such as from a dirty bomb compared to a low flow rate gas sampler. The use of a fan results in a quiet, low power consumption apparatus compared to samplers employing a vacuum pump. The apparatus may be inconspicuously installed in businesses, workplaces, and residences. The apparatus may also include a sensor / collector for the detection / collection of radioactive material, a processor for monitoring operation of...
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Abstract
A high-flow rate, low-noise, gas sampling apparatus for collecting particulate such as biological, chemical, and radioactive material from a gas on a collector such as an impaction collector includes a housing having an inlet and an outlet and a fan disposed within the housing for drawing the gas into the inlet, past the collector for sampling, and exhausting the gas through the outlet. The fan is operable to produce a flow of gas through the housing of greater than about 50 liters per minute with a noise level emitted from the apparatus being less than about 60 decibels. The apparatus may be configured as a compact, unobtrusive, portable, lightweight apparatus for use in various indoor or outdoor locations. The apparatus may also include a sensor for the detection of radioactive material collected on the collector, a processor for monitoring the sampling, and the apparatus may be linked to a communications network such as the Internet. Methods for collecting particulate from a gas are also enclosed.
Description
FIELD OF THE INVENTION [0001] This invention relates generally to gas samplers, and more particularly to gas sampling apparatus and methods for collecting and detecting particulate in a gas. BACKGROUND OF THE INVENTION [0002] Conventional gas samplers for collecting particulate include a housing having a vacuum pump for drawing gas past a collector such as a filter paper, a glass fiber filter media, a filter cassette, and an activated carbon cartridge. [0003] Limitations with such conventional gas samplers for collecting particulate include the vacuum pump generally producing a low flow rate of gas to be sampled, the filter becoming clogged, and the vacuum pump being noisy. [0004] There is a need for further gas sampling apparatus and methods for collecting and detecting particulate in a gas. SUMMARY OF THE INVENTION [0005] The present invention provides, in a first aspect, a high-flow rate, low-noise, gas sampling apparatus for collecting particulate from a gas on a collector. The ...
Claims
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IPC IPC(8): G01N1/22G01N1/24
CPCG01N1/2208G01N1/24G01N2001/2223G01N2001/245
Inventor BASCH, LAUREN R.ROGERS, WILLIAM E.PATASHNICK, HARVEY
Owner THERMO ENVIRONMENTAL INSTR