COULTER LH 500 Hematology Analyzer part numbers: 178832, 178833, and 178834 software versions 1A and 1A2. The LH 500 Analyzer is a quantitative, automated hematology analyzer and leukocyte differential cell counter For In Vitro Diagnostic Use in clinical laboratories. The LH %500 Analyzer also provides a semi-automated reticulocyte analysis.