GB1084289A - - Google Patents
Info
- Publication number
- GB1084289A GB1084289A GB1084289DA GB1084289A GB 1084289 A GB1084289 A GB 1084289A GB 1084289D A GB1084289D A GB 1084289DA GB 1084289 A GB1084289 A GB 1084289A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ionization
- air
- during manufacture
- collecting electrodes
- electrodes
- 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.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
- G01N27/64—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber
- G01N27/66—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber and measuring current or voltage
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pathology (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Immunology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Toxicology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
1,084,289. Electro-physical measurement. KRIVOROZHSKY GORNORUDNY INSTITUTE. Nov. 24, 1964, No. 47715/64. Heading G1N. In apparatus for determining the dust content of air the air is drawn at a specified rate, as by an extraction fan, through reference and test ionization chambers in which ionization is effected by low level alpha emitters which may be pre-set in position during manufacture to locate the zone of maximum ionization relatively to the collecting electrodes. Each radiation source comprises an inorganic plastic disc U 2 , in which plutonium 239 is embedded, mounted in a stainless steel holder on a carrier 32 which can be set during manufacture by means of a thread along the axis of a sleeve 33. The air is fed through pipe 36 the ends of which carry cowls and fog eliminators, the reference chamber inlet having a changeable filter 39. High tension electrodes E2 localize and increase the ionization. The collecting electrodes C 2 are connected differentially to a D. C. amplifier. The apparatus is arranged as a portable unit energized from a rechargeable battery via a D. C. transformer including a transistor oscillator. A switch allows different sensitivity ranges to be selected.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR992948A FR1421434A (en) | 1964-10-28 | 1964-10-28 | Radioactive dust meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1084289A true GB1084289A (en) |
Family
ID=8841254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1084289D Active GB1084289A (en) | 1964-10-28 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1421434A (en) |
| GB (1) | GB1084289A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2291195A (en) * | 1994-06-08 | 1996-01-17 | Peter Doughty | Monitoring personal dust exposure |
-
0
- GB GB1084289D patent/GB1084289A/en active Active
-
1964
- 1964-10-28 FR FR992948A patent/FR1421434A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2291195A (en) * | 1994-06-08 | 1996-01-17 | Peter Doughty | Monitoring personal dust exposure |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1421434A (en) | 1965-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1161190A (en) | Determination of the Properties of Particles Entrained in a Stream of Gas | |
| GB1066009A (en) | Leak detector | |
| GB1132873A (en) | Apparatus for the separation of radioelements | |
| GB1225692A (en) | ||
| GB821367A (en) | Improvements in neutron detectors | |
| GB1366276A (en) | Flame ionization detectors | |
| GB1084289A (en) | ||
| GB936623A (en) | Improvements in or relating to apparatus for detecting small particles in a space | |
| GB1078298A (en) | Improvements in or relating to portable instruments for determining the amounts of particular gases in underground air currents | |
| GB829864A (en) | Improvements in or relating to automatic dew-point detecting apparatus | |
| GB1105604A (en) | Determining the concentration of particles suspended in air | |
| GB1051886A (en) | ||
| GB1193976A (en) | Flame Ionization Detector | |
| GB1098533A (en) | Improvements in or relating to apparatus for detecting hydrocarbons | |
| GB1098161A (en) | Improvements in or relating to fire detection apparatus | |
| GB1425152A (en) | Devices for use in measuring gas flow | |
| GB1001876A (en) | Apparatus for detecting radiation | |
| GB1274245A (en) | Device for detection of gas flow sense by means of ionizing the flowing gas | |
| ES289576A1 (en) | Arrangement in devices for supporting and conveying airborne materials | |
| GB962707A (en) | Improvements in and relating to the measuring of the dust content of gas-dust mixtures | |
| GB1222600A (en) | Improvements in gas treating apparatus | |
| JPS5236079A (en) | Temperature detecting device | |
| GB1137039A (en) | Through-flow ionisation chamber | |
| GB1394583A (en) | Method of detecting aerosols in air or gases and apparatus for this purpose | |
| GB1011664A (en) | Improvements in or relating to fission product detectors |