Dispensette® S Basic Bottle Top Dispenser by BRAND

Overview

The Dispensette® S Basic Bottle Top Dispenser is a precision-engineered manual liquid handling instrument designed for accurate, repeatable, and safe dispensing of aggressive and moderately hazardous reagents directly from standard laboratory reagent bottles. Based on BRAND’s decades-long heritage in high-integrity liquid transfer systems, the Dispensette® S operates on a positive-displacement piston principle—ensuring volumetric accuracy independent of operator technique, liquid density, or viscosity within its specified operating envelope. Unlike air-displacement pipettes, this bottle-top dispenser eliminates aerosol generation and cross-contamination risk by maintaining a sealed fluid path from bottle to outlet. Its primary application domain spans quality control laboratories, analytical chemistry workflows, and routine sample preparation where reproducible delivery of corrosive or volatile liquids—including concentrated mineral acids (e.g., H₃PO₄, H₂SO₄), alkaline solutions, saline media, and common organic solvents—is required under ISO/IEC 17025-compliant conditions.

Key Features

• Chemical-resistant fluid path constructed from borosilicate glass, ceramic, platinum-iridium alloy, and fluoropolymer components (ETFE, FEP, PFA), ensuring long-term integrity with aggressive reagents
• Digital volume adjustment mechanism with tactile feedback and lockable setting—enabling precise, tamper-resistant volume selection across the full range (including newly introduced 1 mL variant)
• Integrated toothed linear scale guide for enhanced repeatability in volumetric setting, especially critical for applications requiring GLP/GMP traceability
• Redesigned discharge tube assembly available with or without integrated safety reflux valve—preventing backflow during interruption or pressure fluctuations
• Optimized valve system eliminating reliance on elastomeric O-rings, thereby reducing maintenance frequency and improving long-term calibration stability
• Enhanced aspiration efficiency via refined fluid dynamics in the piston chamber, resulting in faster draw-up times without compromising accuracy
• Ergonomic lever design minimizing actuation force—particularly beneficial during high-volume dispensing tasks using large-capacity bottles (e.g., 2.5 L or 5 L HDPE/PE bottles)

Sample Compatibility & Compliance

The Dispensette® S Basic supports a broad spectrum of liquid classes within defined physical limits: maximum vapor pressure ≤ 500 mbar, kinematic viscosity ≤ 500 mm²/s, temperature ≤ 40 °C, and density ≤ 2.2 g/cm³. It is validated for use with phosphoric acid, sulfuric acid (excluding fuming grades), aqueous salt solutions, alcohols, acetone, ethyl acetate, and other low-to-moderate volatility organics. It is explicitly not rated for hydrofluoric acid (HF), nitric acid (HNO₃) above 65%, or hypochlorite solutions due to material compatibility constraints. All wetted materials comply with USP Class VI and FDA 21 CFR Part 177 requirements for indirect food contact. Device construction adheres to DIN EN ISO 8655-3 for piston-operated dispensers, supporting audit readiness in regulated environments including pharmaceutical QC and environmental testing labs.

Software & Data Management

As a manually operated mechanical instrument, the Dispensette® S Basic does not incorporate embedded electronics, firmware, or digital connectivity. Volume settings are physically indexed and visually verifiable via engraved scales—ensuring operational reliability without dependency on power sources or software updates. Calibration records (performed using gravimetric methods per ISO 8655-6) are maintained externally in laboratory notebooks or LIMS systems. The device supports full traceability when used in conjunction with certified reference weights, analytical balances meeting OIML R 76 Class I specifications, and documented calibration SOPs aligned with ISO/IEC 17025 clause 6.5.

Applications

• Accurate dispensing of standardized titrants (e.g., NaOH, HCl, EDTA) in volumetric analysis workflows
• Preparation of calibration standards and QC samples in environmental testing (e.g., EPA Method 300.0, ASTM D1129)
• Controlled addition of catalysts or inhibitors in polymer synthesis and materials science labs
• Routine buffer and media preparation in microbiology and cell culture facilities
• Safe handling of caustic cleaning solutions in instrument maintenance protocols

FAQ

Is the Dispensette® S Basic compatible with hydrochloric acid (HCl)?

Yes—concentrated HCl up to 37% w/w is compatible when used within the specified temperature, vapor pressure, and viscosity limits.
Can it be calibrated in-house?

Yes—gravimetric calibration is supported per ISO 8655-6 using certified weights and a Class I analytical balance; no specialized tools beyond standard metrology equipment are required.
What is the recommended recalibration interval?

Typically every 6–12 months depending on usage frequency and criticality of application; more frequent verification is advised after exposure to extreme pH or thermal cycling.
Does it meet FDA 21 CFR Part 11 requirements?

While the device itself contains no electronic data capture, its mechanical design enables full compliance when integrated into Part 11–compliant documentation and audit trail procedures for volume setting and calibration records.