Globe Scientific Round Float Rack for 1.5mL Microcentrifuge Tubes — 8-Place, 65mm, PP, Autoclavable (456398)

Globe Scientific Round Float Rack (456398) holds 8 microcentrifuge tubes (1.5mL) while floating in water baths, ice buckets, and beakers. The 65mm round diameter fits standard 400mL beakers, keeping samples at the bath temperature while remaining accessible at the liquid surface. Molded legs on the bottom allow the rack to stand upright on the benchtop when you lift it out of the bath — one rack works in both environments without needing a separate bench holder.

Float Racks vs. Loose Tubes in Ice

The traditional approach to cooling samples is dropping tubes into an ice bucket or foam float. Loose tubes in ice get buried, mislabeled, and thermally inconsistent — the tube at the bottom of the ice sits at a different temperature than the one perched on top. Foam floats lose tubes when bumped. The float rack holds each tube in a fixed, numbered position at a consistent depth in the temperature medium. You can identify and retrieve specific tubes without digging, and all 8 tubes experience the same thermal exposure. For temperature-sensitive protocols — enzyme reactions, ligation mixes, competent cell thawing — this consistency directly affects experimental reproducibility.

Round (8-Place) vs. Square (16-Place)

Globe Scientific makes two float rack shapes. This round model (456398) holds 8 tubes in a 65mm diameter that drops into standard beakers and small water baths — ideal for individual researchers with small sample sets. The square model (456395) holds 16 tubes in a 95mm x 95mm footprint for larger batches. Choose round for beaker-based workflows. Choose square when you need more positions or work in wider vessels.

Specifications

• SKU: 456398

• Capacity: 8 places (1.5mL microcentrifuge tubes)

• Shape: Round, 65mm diameter

• Material: Polypropylene (PP), autoclavable

• Color: White

• Features: Floats with full tube load, molded handle, benchtop legs

• Dimensions: 3 x 3 x 4 in