STaK-Chex is a whole blood five-part white cell differential control formulated for the Beckman Coulter LH 500 and HmX hematology analyzers. The control features cap-pierceable vials for autosampling and is available in low, normal and high levels.

STaK-Chex five-part white differential control

STaK-Chex is a whole blood assayed hematology control which offers complete assay values for the five-part white cell differential. White blood cell percentages vary for each cell type and are within clinically significant ranges. The precision and accuracy of the instrument’s laser is controlled each time STaK-Chex is analyzed. The control features cap-pierceable vials for autosampling. Its long shelf life reduces the number of shipments, associated costs and time spent performing lot-to-lot correlation.

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STaK-Chex five-part white differential control


  • Whole blood control that offers complete assay values for the five-part white cell differential
  • Available in three clinically significant levels
  • Plastic cap-pierceable vials for analyzer autosampling
  • Assay values are available for download for the LH500 and HmX
  • 14-day open-vial stability
  • 105-day closed-vial stability


Product Information

DescriptionCatalog Number
4 x 4.0 mL (4 Low)225524
4 x 4.0 mL (4 Normal)225514
4 x 4.0 mL (4 High)225534
12 x 4.0 mL (12 Normal)225114
12 x 4.0 mL (4 Low, 4 Normal, 4 High)225512

View the lot release schedule

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The process of whole blood calibration is critical to Streck so our customers can have the confidence that product assays are accurate. Streck’s calibrators save you from having to complete a tedious whole blood calibration procedure. Our controls are available for most brands of hematology analyzers and come in multiple levels to test accuracy and sensitivity.

Streck hematology products

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