XW Pack D Reagent Diluent

XW Pack D is the diluent reagent formulated by Sysmex America for use with the XW-100 Automated Hematology Analyzer. Supplied in a 2 x 2 liter configuration (ZA900005), this reagent is a core consumable in the sample-processing workflow, diluting whole blood specimens to the precise concentrations the analyzer requires for accurate cell counting and differential results.

Labs running the XW-100 depend on genuine Sysmex reagents to keep results reliable and to stay within the manufacturer's validated performance parameters. XW Pack D is designed specifically for whole blood samples on this platform, so substituting a generic diluent risks flagged results, recalibration headaches, and out-of-spec QC. Ordering the correct pack size and part number matters here — the 2 x 2 liter format suits low-to-moderate volume settings like physician office labs, clinics, and point-of-care sites where the XW-100 is commonly deployed.

Because the XW-100 is a closed-system CLIA-waived analyzer, its consumables work together as a set. Most facilities pair diluent with the companion lyse reagent to complete the reagent kit for uninterrupted testing. If you also stock the lyse reagent, see our XW Pack L collection to keep both consumables on hand and avoid downtime between shipments.

Storage follows the reagent's labeled conditions, and each pack carries a lot number and expiration date for traceability — keep an eye on both when planning reorders so you always have valid reagent ready for patient testing. Buy in the quantities that match your testing cadence to minimize waste from expired stock.