Coulter counter


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counter

 [kown´ter]
an instrument or apparatus by which numerical value is computed; in radiology, a device for enumerating ionizing events.
Coulter counter an automated instrument for performing blood counts, based on the principle that cells are poor electrical conductors compared with saline solution.
Geiger counter (Geiger-Müller counter) a radiation counter using a gas-filled tube that indicates the presence of ionizing particles. It is very sensitive to β particles but relatively insensitive to γ and x-rays.
scintillation counter a device for detecting ionization events, permitting determination of the concentration of radioisotopes in the body or other substance.

Coulter counter

[kōl′tər]
Etymology: W.H. Coulter, twentieth century American engineer
a trademark for an electric device that rapidly identifies and counts red and white blood cells present in a small specimen of human blood.

Coulter counter

An electronic device for automatic blood cell count and analysis. The demands on haematological laboratories are so great nowadays, that manual methods are impracticable and automation is essential.

Coulter counter

an electronic particle analyser, in which a pair of electrodes detects the effect of a passing particle on the impedance. The counter is used to measure the total cell count in a microbiological sample.

Coulter counter

an instrument that counts particles in a fluid medium by electronic means. Can be calibrated to count cells in milk or a blood sample.
References in periodicals archive ?
Design and fabrication of a micromachined Coulter counter.
Shortly thereafter, the Coulter Principle was adopted in the first automated hematology analyzer, the Coulter Counter Model A.
Koepke, MD, professor emeritus at Duke University in Durham, NC, and one of the first to purchase the Coulter Counter Model A when he worked for the University of Kentucky Medical Center in Lexington, KY.
In order to fully appreciate the Coulter Counter, one needs to view its significance in relation to the medical technology of its day--in this case, the hundred-year-old method of visually counting cells with a counting chamber and microscope," says Alan Jones, MD, who became friends with Wallace Coulter when Wallace personally installed an early Coulter Counter model in Jones' laboratory at Children's Medical Center in Boston in 1958.
While the previous technology provided a standard precision deviation of plus or minus 10%, the Coulter Counter reduced this deviation to plus or minus 1%," says Jones.
In the field of hematology, early Coulter Counters were remarkable for their ability to perform simple counts rapidly.
With wireless technology linked to automatic monitoring kit to monitor things like TDS (total dissolved solids, which if high is a strong indicator of lack of due care and attention by the cooling tower owner/operator), coulter counters, active bacteria destruction kit such as, but not limited to, UV or UV coupled to sonicators or a pressure cylinder (akin to the Hugh's Press) for disrupting possible host eukaryotes (e.