Nichiryo Dispet Ex High-Precision Bottle-Top Dispenser
| Brand | Nichiryo |
|---|---|
| Origin | Japan |
| Model | Dispet Ex |
| Dispensing Range | 0.2–10 mL (DP-10), 0.4–20 mL (DP-20), 1–5 mL (DP-5), 2–10 mL (DP-10) |
| Minimum Increment | 0.05–0.25 mL |
| Accuracy | ±1.0% |
| Coefficient of Variation (CV) | ≤0.2% |
| Bottle Compatibility | Ø22 mm (for DP-5/DP-10), up to Ø45 mm (with optional adapters) |
| Adapter Options | DP-1118 (18 mm), DP-1119 (19 mm), DP-1122 (22 mm), DP-1124 (24 mm), DP-1125 (25 mm), DP-1128 (28 mm), DP-1133 (33 mm), DP-1138 (38 mm), DP-1145 (45 mm) |
| Included Accessories | One 220 mm flexible PTFE-lined tubing (user-cuttable) |
Overview
The Nichiryo Dispet Ex is a high-precision, manually operated bottle-top dispenser engineered for reproducible, contamination-free liquid handling in analytical laboratories, quality control environments, and research settings. Based on positive displacement piston technology, the Dispet Ex delivers consistent volumetric accuracy across its full dispensing range without reliance on gravity or atmospheric pressure—ensuring reliable performance regardless of liquid viscosity, volatility, or vapor pressure. Its design adheres to ISO 8655-3 (2022) standards for piston-operated volumetric apparatus, with traceable calibration documentation available upon request. The device is optimized for routine use with common laboratory reagent bottles—including narrow-neck HDPE, glass, and PET containers—and supports seamless integration into GLP-compliant workflows where auditability and operator consistency are critical.
Key Features
- Positive displacement mechanism ensures high reproducibility (CV ≤ 0.2%) and accuracy (±1.0%) across all models, validated per ISO 8655-3 protocols.
- Chemically resistant fluid path constructed from PTFE-coated stainless steel piston, ETFE seals, and borosilicate glass cylinder—compatible with organic solvents, strong acids (e.g., HNO₃, HCl), bases (e.g., NaOH), and oxidizing agents.
- Ergonomic, lightweight housing (≤280 g) enables stable one-handed operation; integrated grip texture minimizes slippage during repetitive dispensing.
- Quick-change adapter system supports nine standardized neck diameters (18–45 mm); DP-11xx series adapters snap securely onto the dispenser head without tools.
- Graduated volume scale with dual-unit markings (mL and µL) and parallax-reducing mirrored background for precise visual alignment.
- Includes one 220 mm length of chemically inert, low-permeability PTFE-lined silicone tubing—cut-to-fit for optimal reach and drip control with target vessels (e.g., test tubes, vials, cuvettes).
Sample Compatibility & Compliance
The Dispet Ex accommodates standard laboratory reagent bottles up to 1 L capacity (e.g., 200 mL, 350 mL, and 1000 mL formats), with mechanical stability verified for bottles up to 98 mm wide × 350 mm tall. It is routinely deployed in applications requiring compliance with USP , ASTM E2758, and ISO/IEC 17025 accreditation criteria. All wetted materials comply with FDA 21 CFR §177.2600 (indirect food additives) and EU Regulation (EC) No. 1935/2004. Calibration certificates—traceable to NMIJ/AIST (Japan) or NIST (USA)—are available as optional documentation for regulated QC/QA environments.
Software & Data Management
As a mechanical, non-electronic dispensing system, the Dispet Ex operates without firmware, batteries, or software dependencies—eliminating validation overhead associated with electronic devices under FDA 21 CFR Part 11. However, it fully supports paper-based or LIMS-integrated recordkeeping: each unit ships with a serialized identification plate and optional calibration log template compatible with electronic lab notebook (ELN) systems. Users may assign unique instrument IDs, record daily verification checks (e.g., gravimetric verification per ISO 8655-5), and maintain maintenance logs aligned with GMP Annex 15 requirements.
Applications
- Preparation of calibration standards and reference solutions in ICP-MS, HPLC, and GC laboratories.
- Accurate reagent addition in titration, spectrophotometry, and enzymatic assay workflows.
- Dilution series generation for ELISA, PCR master mix preparation, and cell culture media formulation.
- Controlled dispensing of hazardous or air-sensitive reagents (e.g., TMS-diazomethane, anhydrous AlCl₃ solutions) via closed-system tubing connection.
- Teaching laboratories requiring robust, intuitive tools for volumetric technique training under ISO/IEC 17025 competency assessment frameworks.
FAQ
Is the Dispet Ex suitable for dispensing hydrofluoric acid (HF)?
No. While the PTFE-coated piston and ETFE seals resist most aggressive chemicals, HF attacks silica-based components—including the borosilicate glass cylinder—and is not recommended.
Can I use the same dispenser for both aqueous and organic solvents?
Yes—provided thorough cleaning (e.g., sequential rinses with water, ethanol, and acetone) is performed between solvent classes to prevent cross-contamination and seal swelling.
What is the recommended recalibration interval?
Annual recalibration is advised for GLP/GMP environments; for non-regulated use, verify gravimetrically before each shift when used in critical assays.
Are replacement parts (e.g., pistons, seals, tubing) available separately?
Yes. Nichiryo supplies OEM-certified spare kits (Part Nos. DP-SK1, DP-SK2) with full traceability and compatibility assurance.
Does the dispenser require priming before first use?
Yes. Follow the manufacturer’s three-cycle priming protocol using the target solvent to eliminate air pockets and ensure piston seal seating.
