DE2756164A1 - Determination of number of particles in air - using electrostatic field with deflection through 180 degrees for use with microbiological counts in pharmaceutical works etc. - Google Patents

Determination of number of particles in air - using electrostatic field with deflection through 180 degrees for use with microbiological counts in pharmaceutical works etc.

Info

Publication number
DE2756164A1
DE2756164A1 DE19772756164 DE2756164A DE2756164A1 DE 2756164 A1 DE2756164 A1 DE 2756164A1 DE 19772756164 DE19772756164 DE 19772756164 DE 2756164 A DE2756164 A DE 2756164A DE 2756164 A1 DE2756164 A1 DE 2756164A1
Authority
DE
Grant status
Application
Patent type
Prior art keywords
number
air
particles
deflection
degrees
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE19772756164
Other languages
German (de)
Other versions
DE2756164C2 (en )
Inventor
Claus H Dr Beck
Herbert Dipl Phys Anschuetz
Original Assignee
Claus H Dr Beck
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by the preceding groups
    • G01N33/0004Gaseous mixtures, e.g. polluted air
    • G01N33/0009General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0011Sample conditioning
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/02Devices for withdrawing samples
    • G01N1/22Devices for withdrawing samples in the gaseous state
    • G01N1/2202Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/02Devices for withdrawing samples
    • G01N1/22Devices for withdrawing samples in the gaseous state
    • G01N1/2202Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G01N2001/222Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling other features
    • G01N2001/2223Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling other features aerosol sampling devices

Abstract

The number of dust particles in air is used to determine the air purity. The number is measured by deflecting the air stream through 180 degrees in the presence of an electric field. The deflection is done in a deflector of hemispherical section. Below this is mounted an electrode immediately above this is placed a droplet of a tacky liq. to collect the dust on a glass slide. Because of the electric field, the particles become charged and are attracted to the electrode located immediately below the droplet. They enter the boundary layer and then remain. Their number is counted by a conventional microscopic technique. Used in measuring air purity in pharmaceutical works, dispensaries etc. esp. to measure microbiological counts. Allows this to be done simply and cheaply using appts. commonly available in medical or pharmaceutical areas and in equipment which is easily operated.
DE19772756164 1977-12-16 1977-12-16 Expired DE2756164C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19772756164 DE2756164C2 (en) 1977-12-16 1977-12-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772756164 DE2756164C2 (en) 1977-12-16 1977-12-16

Publications (2)

Publication Number Publication Date
DE2756164A1 true true DE2756164A1 (en) 1979-06-21
DE2756164C2 DE2756164C2 (en) 1982-11-25

Family

ID=6026336

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19772756164 Expired DE2756164C2 (en) 1977-12-16 1977-12-16

Country Status (1)

Country Link
DE (1) DE2756164C2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005083391A1 (en) * 2004-02-26 2005-09-09 Thomsen Bioscience A/S Method, chip, device and system for collection of biological particles
WO2005083426A3 (en) * 2004-02-26 2005-10-13 Thomsen Bioscience As Method, chip, device and integrated system for detection biological particles
US7985540B2 (en) 2004-02-26 2011-07-26 Delta, Dansk Elektronik, Lys & Akustik Method, chip, device and system for extraction of biological materials
DE102011109734A1 (en) * 2011-08-08 2013-02-14 Veritas Ag Filter protective cap used for protecting sensor from dust and air pollution, has air detour portion that is provided between bottom section and mounting portion, through which flowing air is returned back

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1274415A (en) * 1917-02-05 1918-08-06 Earl V Hill Dust-counter.
DE724756C (en) * 1939-09-20 1942-09-04 Siemens Lurgi Cottrell Elektro Centrifugal electrostatic precipitator
US3094828A (en) * 1958-08-11 1963-06-25 Sharples Corp Centrifugal dust separator
DE1159395B (en) * 1958-07-18 1963-12-19 Continental Carbon Co An electrostatic precipitator for the removal of aerosols from Gasstroemen
US3741001A (en) * 1972-03-20 1973-06-26 Nasa Apparatus for sampling particulates in gases

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1274415A (en) * 1917-02-05 1918-08-06 Earl V Hill Dust-counter.
DE724756C (en) * 1939-09-20 1942-09-04 Siemens Lurgi Cottrell Elektro Centrifugal electrostatic precipitator
DE1159395B (en) * 1958-07-18 1963-12-19 Continental Carbon Co An electrostatic precipitator for the removal of aerosols from Gasstroemen
US3094828A (en) * 1958-08-11 1963-06-25 Sharples Corp Centrifugal dust separator
US3741001A (en) * 1972-03-20 1973-06-26 Nasa Apparatus for sampling particulates in gases

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005083391A1 (en) * 2004-02-26 2005-09-09 Thomsen Bioscience A/S Method, chip, device and system for collection of biological particles
WO2005083426A3 (en) * 2004-02-26 2005-10-13 Thomsen Bioscience As Method, chip, device and integrated system for detection biological particles
US7892794B2 (en) 2004-02-26 2011-02-22 Delta, Dansk Elektronik, Lys & Akustik Method, chip, device and integrated system for detection biological particles
US7932024B2 (en) 2004-02-26 2011-04-26 Delta, Dansk Elektronik, Lys & Akustik Method, chip, device and system for collection of biological particles
US7985540B2 (en) 2004-02-26 2011-07-26 Delta, Dansk Elektronik, Lys & Akustik Method, chip, device and system for extraction of biological materials
CN1934443B (en) 2004-02-26 2012-01-04 丹麦台达电子光学声学公司 Method, chip, device and system for collection of biological particles
DE102011109734A1 (en) * 2011-08-08 2013-02-14 Veritas Ag Filter protective cap used for protecting sensor from dust and air pollution, has air detour portion that is provided between bottom section and mounting portion, through which flowing air is returned back

Also Published As

Publication number Publication date Type
DE2756164C2 (en) 1982-11-25 grant

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Legal Events

Date Code Title Description
OAP Request for examination filed
OD Request for examination
D2 Grant after examination
8320 Willingness to grant licenses declared (paragraph 23)
8339 Ceased/non-payment of the annual fee