JPS56151339A - Particle analyzer - Google Patents
Particle analyzerInfo
- Publication number
- JPS56151339A JPS56151339A JP5599180A JP5599180A JPS56151339A JP S56151339 A JPS56151339 A JP S56151339A JP 5599180 A JP5599180 A JP 5599180A JP 5599180 A JP5599180 A JP 5599180A JP S56151339 A JPS56151339 A JP S56151339A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- inputted
- variable amplifier
- sensibility
- concentration
- 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
Links
- 239000002245 particle Substances 0.000 title abstract 3
- 239000000725 suspension Substances 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N15/1031—Investigating individual particles by measuring electrical or magnetic effects
- G01N15/12—Investigating individual particles by measuring electrical or magnetic effects by observing changes in resistance or impedance across apertures when traversed by individual particles, e.g. by using the Coulter principle
- G01N15/131—Details
- G01N15/132—Circuits
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
PURPOSE:To enable automatic adjustment of sensitiveness irrespective of the concentration of a suspension, by a method wherein, an amplifying factor is controlled so that outputs of high-threshold and low-threshold circuits are set into a specified ratio in a Coulter counter. CONSTITUTION:A signal, detected based on a difference in impedance between a particle and liquid by means of a particle detector 1, is converted into a pulse signal and inputted to a variable amplifier 2. The output of the variable amplifier 2 is inputted to one side of a comparision amplifier 15 through a high level threshold circuit 10, a frequency-voltage converter 11, and a doubling amplifier 14, and is inputted to the other through a low level threshold circuit 12, and a frequency- voltage converter 13. The output of the comparison amplifier 15 adjusts a feedback resistance of the variable amplifier 2 using a servo-motor 16. This permits the automatic adjustment of the sensibility of the variable amplifier 2 even if the concentration of the suspension changes and the sensibility varies.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5599180A JPS56151339A (en) | 1980-04-25 | 1980-04-25 | Particle analyzer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5599180A JPS56151339A (en) | 1980-04-25 | 1980-04-25 | Particle analyzer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56151339A true JPS56151339A (en) | 1981-11-24 |
JPH0146816B2 JPH0146816B2 (en) | 1989-10-11 |
Family
ID=13014546
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5599180A Granted JPS56151339A (en) | 1980-04-25 | 1980-04-25 | Particle analyzer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56151339A (en) |
-
1980
- 1980-04-25 JP JP5599180A patent/JPS56151339A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0146816B2 (en) | 1989-10-11 |
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