Stuart Pressmatic PD10P & PD10R Bottle Top Dispensers

Overview

The Stuart Pressmatic PD10P and PD10R are precision-engineered manual bottle top dispensers designed for reliable, repeatable liquid handling in regulated laboratory environments. Based on positive displacement piston technology, these devices deliver consistent volumetric accuracy without reliance on gravity or pressure differentials—making them ideal for applications requiring traceability, reproducibility, and operator safety. The PD10P variant features a polypropylene (PP) valve body with a borosilicate glass piston and PTFE-sealed components, optimized for general-purpose use with aqueous and moderately aggressive reagents. The PD10R model upgrades critical wetted parts to chemically inert ceramic and PTFE, enabling safe handling of corrosive solutions while maintaining full autoclavability at 121 °C for GLP/GMP-compliant sterilization cycles. Both models operate via a calibrated rotary volume-setting ring with mechanical auto-locking—eliminating drift during dispensing—and incorporate a recirculation valve (PD10R only) that returns priming liquid directly to the source container, minimizing waste and exposure risk.

Key Features

• Positive displacement piston mechanism ensures high volumetric reproducibility (< 0.1% RSD) across the full 2.0–10.0 mL range
• Auto-locking volume adjustment ring with tactile feedback and clear scale markings (0.25 mL increments)
• Full 360° rotational mounting for ergonomic positioning on standard GL45, GL32, and GL25 bottle necks
• Integrated drip shield prevents droplet formation and cross-contamination during dispensing
• Autoclavable design: entire unit withstands repeated steam sterilization at 121 °C, 15 psi for 20 minutes without disassembly
• Recirculation valve (PD10R only) routes priming fluid back into the reservoir—enhancing safety and reducing reagent loss
• Factory-calibrated per ISO 8655-3; supplied with traceable certificate of calibration (NIST-traceable reference standards)

Sample Compatibility & Compliance

The PD10P is validated for use with dilute mineral acids (e.g., ≤10% HCl, ≤5% H₃PO₄), phosphate and Tris buffers, ethanol/water mixtures, saline solutions, and common cell culture media. It is not recommended for concentrated oxidizers (e.g., >70% HNO₃, fuming H₂SO₄), strong bases (>2 M NaOH), or non-polar solvents (e.g., toluene, chloroform, hexane). The PD10R extends compatibility to aggressive reagents including HF (in PD10R/HF configuration), perchloric acid (dilute), and organic acids such as acetic and formic acid. All models comply with ISO 8655-3 for piston-type dispensers and support audit-ready documentation required under FDA 21 CFR Part 11 when integrated with validated electronic lab notebooks (ELNs). Units meet CE marking requirements for laboratory equipment (2014/30/EU EMC Directive and 2014/35/EU LVD Directive).

Software & Data Management

While the PD10P and PD10R are manually operated instruments, their metrological integrity supports full integration into quality management systems. Each unit ships with a unique serial-numbered calibration certificate referencing ISO/IEC 17025-accredited verification procedures. Calibration data—including as-found/as-left values, uncertainty budgets, and environmental conditions—is archived in accordance with GLP principles. For laboratories implementing electronic recordkeeping, Stuart provides editable PDF calibration templates compatible with validated document control platforms. Optional accessories include QR-coded asset tags and digital logbook templates aligned with ISO 15197 and CLIA requirements for reagent dispensing traceability.

Applications

• Preparation of standardized buffer solutions in analytical chemistry and QC labs
• Accurate dosing of titrants and indicators in volumetric analysis workflows
• Reagent dispensing for ELISA, PCR setup, and cell-based assays where low carryover is critical
• Controlled addition of catalysts or initiators in synthetic chemistry protocols
• Calibration solution preparation for ICP-MS, HPLC, and UV-Vis spectrophotometers
• Dispensing of hazardous reagents (e.g., HF, chromic acid) in fume hood environments using PD10R/HF configuration

FAQ

Are Stuart Pressmatic dispensers compliant with ISO 8655?
Yes—both PD10P and PD10R conform to ISO 8655-3:2022 for piston-operated dispensers, including requirements for accuracy, repeatability, temperature compensation, and calibration methodology.
Can the PD10R be sterilized in an autoclave without disassembly?
Yes—the entire assembly is rated for full-cycle autoclaving at 121 °C, 103 kPa (15 psi) for 20 minutes. No component removal is required prior to sterilization.
What is the maximum operating temperature for continuous use?
The PD10P is rated for ambient use up to 40 °C; the PD10R maintains structural and functional integrity up to 60 °C due to its ceramic/PTFE construction.
Do these dispensers require periodic recalibration?
Per ISO 8655-5, annual recalibration is recommended for routine use; more frequent verification is advised when handling high-value or regulated reagents or following maintenance events.
Is the recirculation valve present in both PD10P and PD10R models?
No—the recirculation valve is exclusive to the PD10R and PD10R/HF variants. The PD10P uses a standard fill-and-dispense cycle without recirculation.