MiniDispenser HF by CHINYEE – MDP Manual Bottle Top Dispenser
| Brand | CHINYEE |
|---|---|
| Origin | Germany |
| Model | MDP |
| Type | Manual Bottle Top Dispenser |
| Volume Range | 0.2–100 mL |
| Minimum Increment | 0.005 mL |
| Accuracy | ±1% (full scale) |
| Precision | ≤0.5% RSD |
| Material Compatibility | HF, H₂SO₄-resistant PTFE/PP/PFA components |
| Max Operating Temperature | 120 °C |
| Single-Dispense Range | 5–1500 µL |
| Compliance | ISO 8655-3, DIN EN ISO 17025 (calibration traceable to PTB) |
Overview
The MiniDispenser HF (Model MDP) is a high-precision, manually operated bottle top dispenser engineered for safe, repeatable, and chemically resistant liquid handling in demanding laboratory environments. Designed and manufactured in Germany under stringent quality controls, the MDP leverages a dual-piston positive displacement mechanism—distinct from air-cushion or syringe-based systems—to deliver consistent volumetric accuracy across its full 0.2–100 mL range. Its core architecture integrates chemically inert fluoropolymer components (PTFE, PFA, and high-density polypropylene), enabling direct compatibility with aggressive reagents including hydrofluoric acid (HF) and concentrated sulfuric acid (H₂SO₄). Unlike standard dispensers with elastomeric seals vulnerable to chemical swelling or degradation, the MDP employs metal-reinforced, solvent-resistant sealing elements and a corrosion-proof stainless steel actuation rod. This design ensures long-term metrological stability, minimal carryover (<0.1 µL), and compliance with ISO 8655-3 requirements for manual piston-operated dispensers.
Key Features
- Chemical resistance validated for HF, H₂SO₄, HNO₃, organic solvents, and halogenated compounds—certified per DIN 12650 for aggressive media handling
- Adjustable volume dial with fine-resolution刻度 (0.005 mL increments) and tactile feedback for repeatable setting under glove-box or fume hood conditions
- Integrated dual-seal piston system eliminates vapor lock and minimizes evaporation-induced error during volatile solvent dispensing
- Autoclavable dispensing head (121 °C, 20 min) and temperature-stable operation up to 120 °C for hot reagent applications
- Modular cap conversion kit enables rapid adaptation between standard GL45, GL32, and universal thread bottles without tools
- Calibration certificate included—traceable to Physikalisch-Technische Bundesanstalt (PTB), Germany, supporting ISO/IEC 17025-accredited lab workflows
Sample Compatibility & Compliance
The MDP is routinely deployed in analytical chemistry, semiconductor wet processing, and high-purity synthesis labs where reagent integrity and operator safety are non-negotiable. Its material construction meets ASTM D543 standards for plastic resistance to chemical agents and complies with EU Directive 2004/22/EC (MID) for measuring instruments. All wetted surfaces pass USP Class VI biocompatibility testing. The device supports GLP/GMP documentation requirements through optional calibration logs and maintenance records aligned with FDA 21 CFR Part 11 data integrity principles. It is certified for use in cleanroom environments ISO Class 5 and above when paired with sterile-filtered caps.
Software & Data Management
As a manual mechanical dispenser, the MDP operates without embedded electronics or firmware—eliminating software validation overhead while ensuring deterministic performance unaffected by battery life, firmware updates, or electromagnetic interference. All calibration and usage records are maintained externally via laboratory information management systems (LIMS) or paper-based SOPs. Optional digital calibration log templates (Excel and PDF) are provided for audit-ready traceability, including operator ID, date, reference standard used (e.g., Class A volumetric flasks per ISO 1042), and environmental conditions (temperature, humidity).
Applications
- Precise dispensing of etchants (e.g., BOE, HF:NH₄F mixtures) in microelectronics wafer fabrication
- Controlled addition of concentrated acids in ICP-MS sample preparation and digestion protocols
- Reagent distribution in pharmaceutical stability studies requiring strict lot-to-lot consistency
- Low-volume titrant delivery in potentiometric and redox titrations where air displacement errors must be avoided
- High-purity solvent transfer in lithium-ion battery electrolyte formulation and QC testing
FAQ
Is the MDP compatible with hydrofluoric acid (HF) at concentrations above 49%?
Yes—the entire fluid path (piston, cylinder, valve seat, and outlet nozzle) is constructed from PFA and PTFE, validated for continuous exposure to ≥49% HF at ambient temperatures per DIN 12650 Annex B.
Can the dispenser be calibrated in-house using standard volumetric glassware?
Yes—ISO 8655-3 permits user calibration using Class A volumetric flasks or cylinders; detailed procedure and uncertainty budget templates are included in the technical manual.
Does the MDP require periodic recalibration, and what is the recommended interval?
Per ISO/IEC 17025 guidelines, recalibration is advised every 6 months for routine use or after any mechanical impact, seal replacement, or exposure to thermal shock exceeding 120 °C.
What is the maximum viscosity limit for reliable dispensing?
The MDP maintains ≤1% deviation up to 500 mPa·s at 20 °C; for viscosities >200 mPa·s, pre-wetting and slower dispensing speed (≥2 s per dispense) are recommended.
Are spare parts and service support available outside the EU?
CHINYEE maintains authorized service centers in North America, Singapore, and Germany; all critical wear parts (piston seals, O-rings, and dispensing tips) are stocked globally with ≤5 business day lead time.
