CentrivaLab 50/34
Configuration for 50 mL tube workflows and fixed-angle rotor classes around 34°, intended for NF, RO and OSN membrane screening.
50 mL workflow
~34° rotor class
NF / RO / OSN
CentrivaLab 94/25
Configuration for larger working volumes and fixed-angle rotor classes around 25°. The 94 mL designation refers to the centrifuge tube (rotor bucket) capacity, not the feed volume.
94 mL tube class
~25° rotor class
NF / RO / OSN
Operating envelope — choose your CentrivaLab
The two CentrivaLab families cover complementary regions of the NF/RO/OSN screening envelope and target different centrifuge ecosystems already common in membrane laboratories.
| CentrivaLab 94/25 | CentrivaLab 50/34 | |
|---|---|---|
| Tube class | 94 mL or 100 mL round-bottom | 50 mL round-bottom |
| Rotor angle | ~25° | ~34° |
| Typical operating point | 6 cartridges per run, up to ~40 bar at ~15 000 rpm | 8 cartridges per run, up to ~60 bar at ~20 000 rpm |
| High-pressure mode | 4 cartridges per run, up to ~60 bar at ~20 000 rpm (with a 4-tube rotor, e.g. Sigma 12155) | — |
| Centrifuge class | Benchtop high-speed | Floor superspeed |
| Compatible instruments (examples) | Sigma 3-30KS; Thermo Sorvall ST 16R / ST 40R / Legend XT (with FiberLite F15-6×100y rotor); Multifuge X1 Pro | Beckman Avanti J series (rotor JA-20); Thermo Sorvall RC-5/RC-6 (rotor SS-34); Thermo Sorvall Lynx 4000/6000 (rotor Fiberlite F21-8×50y) |
| Capex tier of compatible centrifuges | Lower | Higher |
Choose CentrivaLab 94/25 if your screening operates up to ~40 bar (covering NF and most RO conditions) and you want to use the benchtop high-speed centrifuge already common in membrane laboratories. The 94/25 also reaches ~60 bar in high-pressure mode with a 4-tube rotor.
Choose CentrivaLab 50/34 if your campaign requires sustained operation at 50–60 bar with high parallelism (8 cartridges per run), and a floor superspeed instrument (Avanti J, Sorvall RC or Lynx) is available.
Product detail
CentrivaLab cartridge
The cartridge houses a flat membrane disc (20 mm outer diameter, 1.45 cm² effective filtration area). After centrifugation, retentate and permeate are collected separately for analysis. The numbered cap system ensures sample tracking across parallel experiments.
Construction materials
Cartridge bodies are available in different engineering materials depending on the chemical compatibility required by the application.
Acrylic resin
Standard option for aqueous NF and RO applications. Suitable for most laboratory membrane screening workflows.
PEEK / PAEK
Recommended for organic solvent nanofiltration (OSN) applications requiring resistance to a broad range of organic solvents.
PPS
Alternative high-performance polymer for solvent-oriented workflows where PEEK/PAEK compatibility needs to be confirmed case by case.