Particle analyzer of the coulter type including coincidence erro

Details Particle analyzer of the coulter type including coincidence erro Particle analyzer of the coulter type including coincidence erro

1974-02-19

1976-02-24

Smith, Alfred E.

Electricity: measuring and testing

Determining nonelectric properties by measuring electric...

Erosion

328 41, 235 92PL, G01N 2700

Patent

active

039406911

ABSTRACT:
A particle analyzer of the Coulter type has at least one sensing zone arrangement for generating a first train of particle pulses having a first number of particle pulses in response to passage through the sensing zone of a sample containing a plurality of particles to be counted. Generating circuitry is provided for generating a second train of particle pulses having a second number of particle pulses based upon a second sample containing a plurality of particles, or a hypothetical second sample. The second sample has a specific relationship to the first sample defined by one of either the first and second sample volume ratios, the first and second sample dilution ratio and the sensing zone volume ratio. Circuitry coupled to the first sensing zone arrangement and the generating circuitry is operative to mathematically change the first number of particle pulses and mathematically change the second number of particle pulses in the first and second trains of pulses respectively, and is further operative to combine the changed number of first and second pulses in accordance with a particular mathematical formula for providing an error corrected particle pulse count.

REFERENCES:
patent: 3209130 (1965-09-01), Schmidt
patent: 3649820 (1972-03-01), Totsuka et al.
patent: 3705295 (1972-12-01), Betz
patent: 3737633 (1973-06-01), Collineau

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