JPS641930A - Dust measuring apparatus - Google Patents
Dust measuring apparatusInfo
- Publication number
- JPS641930A JPS641930A JP15661087A JP15661087A JPS641930A JP S641930 A JPS641930 A JP S641930A JP 15661087 A JP15661087 A JP 15661087A JP 15661087 A JP15661087 A JP 15661087A JP S641930 A JPS641930 A JP S641930A
- Authority
- JP
- Japan
- Prior art keywords
- dust
- air
- filter
- amount
- trapping
- 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.)
- Pending
Links
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
PURPOSE: To measure the amount of dust in air accurately, by determining a ratio of reflection or transmission of a light between a part having dust trapped with a filter for trapping dust and a white part with no dust trapped.
CONSTITUTION: An air passage hole 9' is made in an inner lid 7 and a fixed amount of atmospheric air is sucked through the air passage hole 9'. Air sucked is introduced to a pump through a dust trapping filter 4, when dust in the air is trapped to the circumference of the filter except for a lower part of a rubber body 8 for preventing passage of air. Thus, the center of the filter 4 looks white while the circumferential part thereof is colored according to the amount of dust. After the trapping of dust, the lid 7 is removed to let light irradiate a central white part 5 of the filter 4 and the dust attached part in the perimeter thereof. A ratio of transmission light or reflected light between both the parts is determined to measure the amount of dust in the air from the ratio.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-156610A JPH011930A (en) | 1987-06-25 | sludge measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-156610A JPH011930A (en) | 1987-06-25 | sludge measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS641930A true JPS641930A (en) | 1989-01-06 |
| JPH011930A JPH011930A (en) | 1989-01-06 |
Family
ID=
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5141309A (en) * | 1990-05-05 | 1992-08-25 | Firma Fedag | Apparatus for indicating how dirty an air filter is in a vacuum-cleaning apparatus, in a room filter, etc. |
| JP2013241939A (en) * | 2013-07-11 | 2013-12-05 | Advantest Corp | Collection amount measuring device, measuring method, program and recording medium |
| JP2013253981A (en) * | 2013-07-05 | 2013-12-19 | Advantest Corp | Adhesion quantity measuring apparatus, measuring method, program, and recording medium |
| US8969807B2 (en) | 2009-10-28 | 2015-03-03 | Advantest Corporation | Carrier and adhesion amount measuring apparatus, and measuring method, program, and recording medium of the same |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5141309A (en) * | 1990-05-05 | 1992-08-25 | Firma Fedag | Apparatus for indicating how dirty an air filter is in a vacuum-cleaning apparatus, in a room filter, etc. |
| US8969807B2 (en) | 2009-10-28 | 2015-03-03 | Advantest Corporation | Carrier and adhesion amount measuring apparatus, and measuring method, program, and recording medium of the same |
| JP2013253981A (en) * | 2013-07-05 | 2013-12-19 | Advantest Corp | Adhesion quantity measuring apparatus, measuring method, program, and recording medium |
| JP2013241939A (en) * | 2013-07-11 | 2013-12-05 | Advantest Corp | Collection amount measuring device, measuring method, program and recording medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69022454D1 (en) | Process for the preparation of a polyborosilazane. | |
| DE69015226D1 (en) | Process for the preparation of a fluoroorganopolysiloxane. | |
| DE69131717T2 (en) | DEVICE FOR MEASURING THE IMPEDANCE OF BLOOD VESSELS | |
| DE3772561D1 (en) | METHOD FOR INCREASING THE SENSITIVITY OF A LEAK DETECTOR. | |
| DE69132955D1 (en) | Polymer masses for the absorption of proteinaceous liquids | |
| EP1900324A3 (en) | Apparatus for determining patency of the airway | |
| DE59005714D1 (en) | Process for the preparation of aqueous polymer dispersions. | |
| SE9103165D0 (en) | STRESSNIVAAMAETNINGSANORDNING | |
| JPS57178215A (en) | Spectacle frame | |
| CA2095152A1 (en) | Sample pipetting method | |
| FR2597189B1 (en) | DEVICE FOR EVALUATING THE OPERATION OF A STEAM VENT | |
| ES501821A0 (en) | PROCEDURE FOR OBTAINING A CATALYTIC COMPONENT OF UTILITY IN THE ALFAOLEFIN POLYMERIZATION. | |
| DE59004655D1 (en) | Process for the preparation of a poly-1-olefin. | |
| DE69126657D1 (en) | Process for the preparation of a copolymer latex | |
| DE3765743D1 (en) | DEVICE FOR AUTOMATIC CALIBRATION OF A GAS SENSOR. | |
| JPS641930A (en) | Dust measuring apparatus | |
| OA08782A (en) | Immunologically active polypeptides useful for the preparation of antimalarial vaccines and of diagnostic kits for the detection of antisporozoite antibodies. | |
| ES501387A0 (en) | PROCEDURE FOR DETECTION OF THE PRESENCE OF ANTIGENS OF A BLOOD GROUP A, B, 0 OR AB IN A HISTOLOGICAL COURT | |
| DE68916576D1 (en) | Device for measuring the characteristics of optical frequency modulation. | |
| DE3675772D1 (en) | DEVICE FOR MEASURING THE LEVEL OF TWIST OF A YARN. | |
| DE3850137D1 (en) | Process for the preparation of a graft polymer. | |
| DE3868985D1 (en) | DEVICE FOR SECURING THE LID OF A CAN, IN PARTICULAR PAINT CAN. | |
| DE69519351T2 (en) | Process for the preparation of an alkali-treated powder with immunological activity | |
| DE59000007D1 (en) | CIRCUIT FOR DETECTING MEASURED VALUES OF A FLOOR. | |
| EP0472001A3 (en) | Method for determining the quantity of vapours in air, especially of water vapour |