AHN myDpette Bottle Top Dispenser

Overview

The AHN myDpette Bottle Top Dispenser is a precision-engineered manual liquid handling device designed for repeatable, contamination-free dispensing of reagents and solvents directly from standard laboratory bottles. Based on positive displacement piston technology, it operates without reliance on air displacement or vacuum generation—ensuring consistent delivery across varying liquid densities, viscosities, and vapor pressures. Its core architecture integrates a sealed, chemically inert fluid path composed of PTFE, FEP, and PPS materials, enabling safe handling of aggressive acids, bases, organic solvents, and halogenated compounds. The integrated recirculation safety valve eliminates priming waste by redirecting residual liquid back into the source bottle—a feature that reduces reagent consumption, minimizes environmental exposure, and supports sustainability goals in regulated laboratory environments.

Key Features

• Recirculating Priming Valve: Prevents loss of valuable or hazardous reagents during initial setup; returns displaced liquid to the reservoir bottle instead of venting to waste.
• Bubble-Free Dispensing: Optimized piston stroke dynamics and anti-cavitation valve design eliminate air entrapment—even with low-surface-tension solvents such as acetone or ethanol.
• Universal Bottle Compatibility: Equipped with an adjustable, multi-thread adapter system supporting GL45, GL32, GL25, and common US standard neck threads (e.g., 38-430, 45-400), ensuring secure fit across diverse bottle manufacturers.
• Chemical Resistance Architecture: All wetted parts—including piston seal, cylinder liner, discharge tube, and valve seats—are constructed from fluoropolymer materials compliant with ISO 10993-5 cytotoxicity standards.
• Ergonomic Operation: Dual-mode trigger lever allows both single-step full-stroke dispensing and fine incremental control via partial actuation, reducing operator fatigue during high-throughput workflows.
• Calibration Traceability: Each unit ships with a factory calibration certificate traceable to PTB (Physikalisch-Technische Bundesanstalt), Germany’s national metrology institute, aligned with ISO/IEC 17025 requirements.

Sample Compatibility & Compliance

The AHN myDpette is validated for use with aqueous solutions, buffers, alcohols, ketones, esters, chlorinated hydrocarbons, and dilute mineral acids (e.g., HCl ≤ 6 M, HNO₃ ≤ 4 M). It is not recommended for strong oxidizers (e.g., concentrated H₂O₂, perchloric acid) or highly viscous liquids (>500 mPa·s at 20 °C). Regulatory alignment includes adherence to ISO 8536-4 (glass containers for pharmaceutical use), DIN EN ISO 8655-7 (volumetric apparatus — bottle top dispensers), and compatibility with Good Laboratory Practice (GLP) documentation frameworks. While not inherently 21 CFR Part 11 compliant, its mechanical design supports audit-ready operation when paired with standardized logbook entries and periodic verification per internal SOPs.

Software & Data Management

As a fully mechanical, non-electronic dispensing system, the AHN myDpette requires no firmware, drivers, or software integration. This eliminates cybersecurity risks, firmware obsolescence, and validation overhead associated with digital instruments. All operational parameters—including volume setting, dispense count, and maintenance history—are recorded manually in lab notebooks or LIMS-compatible spreadsheets. For laboratories implementing electronic record systems, the device supports integration via external barcode-scanned usage logs or time-stamped dispensing entries linked to batch numbers and analyst IDs—fully compatible with ALCOA+ data integrity principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available).

Applications

• Preparation of calibration standards and QC reference solutions in analytical chemistry labs (e.g., ICP-MS, HPLC, GC).
• Accurate metering of corrosive titrants (e.g., NaOH, H₂SO₄) in volumetric analysis workflows.
• Reagent distribution in cell culture facilities where sterility and particulate-free delivery are critical.
• Environmental testing labs handling EPA-method solvents (e.g., hexane, methylene chloride) under SW-846 compliance protocols.
• Pharmaceutical R&D settings requiring precise solvent addition during reaction screening or formulation development.

FAQ

Is the AHN myDpette suitable for sterile applications?
Yes—when used with sterilizable bottles and autoclaved adapters (121 °C, 20 min), and when assembled under aseptic conditions. Wetted components retain integrity after repeated sterilization cycles.
Can it be calibrated in-house?
Yes—calibration follows ISO 8655-7 gravimetric procedures using certified weights and Class A volumetric flasks. A calibration kit (part no. CAL-KIT-MYDPETTE) is available separately.
What maintenance is required?
Routine cleaning with compatible solvents; annual replacement of piston seals (kit PSEAL-MYDPETTE); no lubrication required due to self-lubricating fluoropolymer surfaces.
Does it support variable dispensing volumes within its range?
Yes—the volume dial is continuously adjustable between 5.0 and 50.0 mL in 0.25 mL increments, with tactile feedback and engraved scale for visual confirmation.
How is traceability ensured for audit purposes?
Each unit carries a unique serial number laser-engraved on the housing; calibration certificates include measurement uncertainty budgets and PTB traceability statements—fully admissible in FDA, EMA, or ISO 17025 audits.