Para 4®

Para 4 is a hematology control for small laboratories and offices with point-of-care applications that perform a limited number of hematology tests utilizing manual or semi-manual methods. It is a whole blood control that is available in three clinically significant levels.

Para 4 hematology control

Para 4 is an assayed, whole blood hematology control for evaluating the accuracy and precision of automated, semi-automated and manual procedures that measure blood cell parameters. The control resembles the appearance of patient samples and is available in three clinically significant levels. Its long shelf life reduces the number of shipments, associated costs and time spent performing lot-to-lot correlation. Para 4 is available in glass vials or in squeeze dropper vials for accurate sample dispensing, eliminating the need to pipette.

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Para 4 hematology control


  • Whole blood control resembles patient sample
  • Available in three clinically significant levels
  • Packaged in plastic squeeze dropper vials and glass vials
  • 14-day open-vial stability
  • 110-day closed-vial stability


  • Helps clinical laboratories meet quality requirements
  • Established assay ranges provide less room for error
  • Long shelf life reduces the number of shipments and associated costs
  • Fewer lot-to-lot correlations save time and resources
  • Access to STATS®, a free interlaboratory quality control program with peer group data comparison and online submission
DescriptionCatalog Number
3 x 1.5mL (Low, Normal, High) Plastic215103
6 x 1.5 mL (6 Low) Plastic215106
6 x 1.5 mL (6 Normal) Plastic215107
6 x 1.5 mL (6 High) Plastic215108
6 x 1.5mL (2 Low, 2 Normal, 2 High) Plastic215110
8 x 1.5mL (4 Normal, 4 High) Plastic215115
12 x 1.5 mL (4 Low, 4 Normal, 4 High) Plastic215112
3 x 1.5mL (1 Low, 1 Normal, 1 High) Glass215403
6 x 1.5 mL (6 Low) Glass215426
6 x 1.5 mL (6 Normal) Glass215416
6 x 1.5 mL (6 High) Glass215436
6 x 1.5mL (2 Low, 2 Normal, 2 High) Glass215406
12 x 1.5 mL (4 Low, 4 Normal, 4 High) Glass215412
18 x 1.5 mL (6 Low, 6 Normal, 6 High) Glass215418

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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