The Z326-100H-A57 is a 4-position 5/7 mL Vacutainer insert for the Hermle Z326-100H sealed bucket on the Z327 / Z327-K chassis 4-place swing-out rotor — sold as a 2-pack. Each insert holds 4 × 5/7 mL Vacutainer-style tubes; the 4-bucket rotor configuration takes 2 packs (4 inserts) for full symmetric loading, delivering 16 × 5/7 mL Vacutainer tubes per cycle in hermetically sealed swing-out geometry on a refrigerated chassis. Sized for cold-chain BSL-2 + clinical-blood-component prep workflows that use pediatric or small-volume Vacutainer-style blood collection tubes (5 mL or 7 mL).
Key Specifications
| SKU | Z326-100H-A57 |
| Type | Tube insert — 4 × 5/7 mL Vacutainer-style |
| Pack quantity | 2 inserts per SKU (full 4-bucket configuration takes 2 units = 4 inserts) |
| Per-insert capacity | 4 × 5/7 mL Vacutainer-style tubes |
| Per-cycle throughput (full configuration) | 16 × 5/7 mL Vacutainer tubes per cycle |
| Tube format | 5 mL or 7 mL clinical Vacutainer-style (~13 mm OD, 75–100 mm length) |
| Compatible bucket | Z326-100H sealed bucket (with Z326-100H-LID for hermetic seal) |
| Compatible chassis | Z327, Z327-K (refrigerated), and -E voltage variants |
| Max. operating speed (with insert + tubes) | Per Z326-100H spec — 5,000 rpm at 4,080 × g maximum |
| Max. radius | 14.6 cm (0.6 cm radius correction with this insert) |
| Temperature at max speed (Z327-K refrigerated) | 2 °C |
| Geometry | Swing-out (0–90°) — flat sediment surface |
| List price | $267 (2-pack) |
Compatibility & When to Order This SKU
Insert pairing — Z326-100H sealed bucket only. Order this SKU when:
- Adding pediatric or small-volume clinical blood-tube workflow to an existing Z327 / Z327-K + Z326-100H install — order 2 units for full 4-bucket symmetric loading (16 tubes/cycle).
- Cold-chain pediatric clinical-blood-component prep — pediatric phlebotomy workflows that need cold-chain integrity through the spin step.
- BSL-2 + small-volume blood-tube workflows — when 5/7 mL clinical blood-component prep handles potentially infectious patient samples requiring aerosol containment.
- Replacement inserts if a current set is damaged or worn.
Application Profile
Hermetically sealed cold-chain pediatric workflow. The Z326-100H bucket + Z326-100H-LID + A57 insert + Z327-K chassis combination delivers pediatric clinical-blood-component prep with three concurrent characteristics: cold-chain integrity (2 °C at max speed), biosafety containment (sealed bucket envelope), and swing-out flat-sediment geometry.
5/7 mL format flexibility. The insert envelope accommodates both 5 mL and 7 mL Vacutainer-style tube formats (typical 13 mm OD); the same insert serves either tube size, with mixed-volume runs accommodated by symmetric loading by mass.
4-bucket symmetric loading. All 4 buckets must use matching A57 inserts for symmetric balance.
Design Architecture
Cold-chain pediatric clinical-blood-component prep — pediatric blood draws use smaller-volume Vacutainer tubes to minimize patient blood loss; the A57 + Z326-100H + Z327-K combination handles 16 pediatric samples per cycle with cold-chain and optional biosafety containment.
BSL-2 + pediatric clinical-research workflows — pediatric infectious-disease research cohorts (pediatric HIV, pediatric TB, pediatric respiratory pathogen studies) where 5/7 mL collection tubes need both cold-chain and biosafety containment.
Veterinary clinical workflows on the cold-chain biosafety chassis — small-animal blood-component separation requiring cold-chain and biosafety containment.
Clinical-research recruitment with reduced-volume protocols — adult protocols specifying 5 mL or 7 mL collection tubes (some pharmacokinetic, some pediatric-overlap research designs) at cold-chain temperature.
Hospital reference labs handling pediatric specimens — pediatric clinical chemistry and hematology prep at institutional throughput on the Z327-K chassis.
Cross-format Z327-K chassis consolidation — labs running pediatric 5/7 mL alongside adult 10 mL, 15 mL conical, or other tube formats benefit from stocking the cross-format Z326-100H insert family.
Ordering & Configuration
4-bucket symmetric loading. All 4 buckets must use matching A57 inserts. Mixed-bucket configurations produce mass asymmetry.
Hermetic-seal engagement. Per Hermle service instructions, the Z326-100H-LID must be fully engaged on each bucket before each spin to maintain the hermetic envelope at 4,080 × g.
Per-insert symmetric loading. Within each insert, the 4 tubes should be balanced. Mixed 5 mL / 7 mL runs require pre-balance by total tube + sample mass.
Tube cap confirmation. All Vacutainer rubber stoppers or screw caps must be fully seated before spinning at 5,000 rpm.
Z326-100H-A57 ships as 2 inserts. 5 mL and 7 mL Vacutainer-style tubes are operator-supplied (commodity clinical phlebotomy supplies). The Z326-100H bucket and Z326-100H-LID are sold separately.
Confirm at quote: bucket pairing (Z326-100H + Z326-100H-LID in inventory), chassis pairing (Z327 or Z327-K), tube format (5 mL or 7 mL Vacutainer-style), workflow drivers (cold-chain, biosafety, pediatric protocol), pack count (2 packs for full 4-bucket configuration), and lead time.
Warranty: 5-Year Hermle warranty (3 years full + 2 years drivetrain) on the inserts. Hermetic-seal interface is a planned-inspection item.
Z326-100H clinical-blood-tube insert family (Z327 / Z327-K chassis):
- Z326-100H-A57 (this product) — 4 × 5/7 mL pediatric / small-volume blood tubes
- Z326-100H-A10 — 4 × 10 mL adult Vacutainer
- Z326-100H-A15 / A15S / A15L / A15R — 15 mL conical and round-bottom variants
Match the insert to the workflow's clinical blood-tube format; the Z326-100H + Z327-K combination delivers cold-chain biosafety clinical-blood-component prep across the standard pediatric-through-adult tube size range.
