Dispensette® S Organic Bottle Top Dispenser
| Brand | BRAND |
|---|---|
| Origin | Germany |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | Vernier-Adjustable |
| Instrument Type | Manual Bottle Top Dispenser |
| Operating Limits | Max. vapor pressure 500 mbar, max. kinematic viscosity 500 mm²/s, max. operating temperature 40 °C, max. liquid density 2.2 g/cm³ |
| Wetted Materials | Borosilicate glass, aluminum oxide ceramic, tantalum, ETFE, FEP, PFA, PTFE, PP |
Overview
The Dispensette® S Organic is a high-precision, manually operated bottle top dispenser engineered for safe, accurate, and repeatable dispensing of aggressive organic solvents, strong mineral acids (excluding hydrofluoric acid), and highly reactive reagents including trifluoroacetic acid (TFA), tetrahydrofuran (THF), peroxides, chlorinated hydrocarbons (e.g., dichloromethane, trichlorotrifluoroethane), and fluorinated compounds. Designed in accordance with ISO 8655-7 for piston-operated volumetric dispensers, it employs a positive-displacement principle: liquid is drawn into a chemically inert, sealed chamber via vacuum generation during upward plunger movement, then expelled under controlled mechanical force during downward stroke—ensuring minimal vapor exposure, no cross-contamination, and consistent delivery independent of operator technique.
Key Features
- Chemically resistant wetted components: borosilicate glass barrel, aluminum oxide ceramic piston seal, tantalum spring, and fluoropolymer fluid path (ETFE, FEP, PFA, PTFE) plus polypropylene housing—validated for compatibility with Class I–III organic solvents per ASTM D471 and ISO 1817.
- Vernier-adjustable volume setting mechanism with integrated toothed guide rail—enables precise, tactile, and highly reproducible volume selection across the full range; eliminates parallax error inherent in analog scale-only designs.
- New-generation discharge tube options: standard tip or safety-return valve configuration—prevents backflow, over-pressurization, and accidental siphoning when dispensing volatile or low-boiling-point liquids.
- Seal-free valve system: eliminates elastomeric O-rings susceptible to swelling or degradation in organic media—improves long-term metrological stability and reduces maintenance intervals.
- Optimized fluid dynamics: enhanced suction efficiency via revised internal flow geometry—reduces aspiration time by up to 30% compared to prior-generation models, particularly beneficial for high-viscosity applications near the 500 mm²/s limit.
- Ergonomic lever design with mechanical advantage ratio calibrated for reduced actuation force—critical for repetitive dispensing tasks and large-volume (≥10 mL) operations.
Sample Compatibility & Compliance
The Dispensette® S Organic is certified for use with liquids meeting the following operational constraints: saturated vapor pressure ≤500 mbar at 20 °C, kinematic viscosity ≤500 mm²/s at 20 °C, density ≤2.2 g/cm³, and temperature ≤40 °C. It complies with EU Directive 2014/30/EU (EMC), 2014/35/EU (LVD), and carries CE marking. All materials contacting fluid are compliant with USP Class VI and FDA 21 CFR 177.1550 (fluoropolymers) and 177.1520 (polypropylene). Device validation documentation supports GLP and GMP environments, including traceable calibration certificates (DIN EN ISO/IEC 17025 accredited), and supports audit-ready records for FDA 21 CFR Part 11–compliant software integration where used with compatible digital controllers.
Software & Data Management
While the Dispensette® S Organic is a manual, non-electronic instrument, its volume settings are fully traceable via engraved vernier scale and factory-certified calibration reports. When integrated into automated workflows using third-party lab management systems (e.g., LabVantage, STARLIMS), dispensing events can be logged via barcode-scanned lot-specific calibration cards. Optional digital adapters (sold separately) enable Bluetooth-enabled volume tracking and electronic record generation compliant with ALCOA+ principles—supporting data integrity requirements for regulated pharmaceutical and contract research organizations.
Applications
- Precise volumetric transfer of HPLC-grade solvents in analytical chemistry labs.
- Safe handling of concentrated HCl and HNO₃ in trace metal analysis (ICP-MS, AAS) sample preparation.
- Controlled addition of TFA and THF in peptide synthesis and polymer chemistry.
- Accurate dosing of peroxide initiators in radical polymerization without thermal runaway risk.
- Reagent dispensing in ISO 17025-accredited testing laboratories requiring documented uncertainty budgets per ISO/IEC 17025:2017 Clause 7.6.3.
- Use in cleanroom environments (ISO Class 5–8) due to particle-shedding–free construction and static-dissipative housing.
FAQ
Is the Dispensette® S Organic suitable for hydrofluoric acid (HF)?
No. HF attacks both borosilicate glass and tantalum components; use only HF-compatible dispensers with fused silica and Hastelloy C-276 wetted parts.
Can it be sterilized in an autoclave?
No. Maximum operating temperature is 40 °C; autoclaving would degrade fluoropolymer seals and compromise dimensional stability of the glass barrel.
What is the recommended recalibration interval?
Annual calibration is advised per ISO 8655-7; however, frequency must be justified by risk assessment and usage intensity—typically every 6 months in high-throughput QC labs.
Does the vernier adjustment require tools?
No. Volume is set manually via thumbwheel and locking ring; no screwdrivers or calipers are needed for routine operation.
How is compliance with ISO 8655 verified?
Each unit ships with a DIN EN ISO/IEC 17025–accredited calibration certificate specifying gravimetric test results at three volumes across the range, uncertainty values, and environmental conditions during verification.
