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.

Show More
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


Product Information

DescriptionCatalog Number
6 x 1.5 mL (6 Low, Plastic)215106
6 x 1.5 mL (6 Normal, Plastic)215107
6 x 1.5 mL (6 High, Plastic)215108
12 x 1.5 mL (4 Low, 4 Normal, 4 High, Plastic)215112
6 x 1.5 mL (6 Low, Glass)215426
6 x 1.5 mL (6 Normal, Glass)215416
6 x 1.5 mL (6 High, Glass)215436
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

Order Para 4 today

New customers

Existing customers

International customers find a distributor

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

The latest from the blog

The critical step of lysing in A1c testing
Quality Control

Lysing is a critical step in A1c testing

Diabetes is the seventh leading cause of death in the United States. In the last 20 years, the number of adults diagnosed with diabetes has more than …
Read More
Quality Control

Clinical lab body fluid evaluation

Contributing author: Jessica Hart, Streck RD Associate Scientist 2 To paint a clear diagnostic picture for many pathological conditions, healthcare pr…
Read More
Quality Control

Higher COVID-19 Mortality for SCD

A recent post on the Centers for Disease Control and Prevention (CDC) website offered a warning that COVID-19 patients who also have Sickle Cell Disea…
Read More