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J Clin Pathol. 1970 February; 23(1): 68–76.
PMCID: PMC474420

An assessment of the Coulter counter model S


An assessment of the Coulter model S automatic blood counter has been carried out. The standard deviations for the haemoglobin concentration, haematocrit, red cell count, and white cell count are, respectively, ± 0·15 g/100 ml, ± 0·45%, ± 0·04 m/c mm, and ± 0·47 thous/c mm. These results are clearly more accurate than careful manual estimates, performed for comparison on the same samples. Details of the comparisons are presented. A comparison is also made with routine daily estimations.

`Carryover' from one sample to the next was found to be about 2%, and tests in the ranges likely to be found in practice showed good linearity for the haemoglobin estimation, haematocrit, red cell count, and white cell count. A brief account of instrument failures is given.

The performance of the Coulter model S compares well with that of other automated equipment for which detailed evaluations are available.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.
  • Barnard DF, Carter AB, Crosland-Taylor PJ, Stewart JW. An evaluation of the Coulter model S. J Clin Pathol Suppl Coll Pathol. 1969;3:26–33. [PMC free article] [PubMed]
  • BRECHER G, SCHNEIDERMAN M, WILLIAMS GZ. Evaluation of electronic red blood cell counter. Am J Clin Pathol. 1956 Dec;26(12):1439–1449. [PubMed]
  • Lappin TR, Lamont A, Nelson MG. An evaluation of the autoanalyzer SMA-4. J Clin Pathol. 1969 Jan;22(1):11–18. [PMC free article] [PubMed]
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  • Nelson MG. Automation in the laboratory. J Clin Pathol. 1969 Jan;22(1):1–10. [PMC free article] [PubMed]

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