Rainin DISP-X Bottle Top Dispenser
| Brand | Rainin |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | DX |
| Instrument Type | Manual Bottle Top Dispenser |
| Capacity Ranges | 0.5–5 mL, 1–10 mL, 2.5–25 mL, 5–50 mL |
| Chemical Compatibility | Broad (including corrosive and flammable liquids) |
| Sterilization | Autoclavable (121°C, 20 min) |
| Safety Features | Integrated discharge tube with safety cap, grooved tube for correct alignment, inert PTFE/glass piston assembly in polypropylene sleeve |
Overview
The Rainin DISP-X Bottle Top Dispenser is a precision-engineered manual liquid handling device designed for accurate, repeatable, and safe dispensing of reagents directly from laboratory reagent bottles. Based on positive displacement volumetric principle—where a calibrated glass piston moves within an inert polypropylene sleeve to displace a defined volume—the DISP-X delivers high reproducibility across diverse liquid classes, including aqueous solutions, organic solvents, acids, bases, and low- to medium-viscosity formulations. Its robust architecture and chemically inert construction make it suitable for routine use in GLP-compliant environments, ISO 17025-accredited testing labs, and cGMP-regulated pharmaceutical quality control workflows. Unlike air-displacement pipettes, the DISP-X eliminates aerosol generation and cross-contamination risk by maintaining physical separation between operator and liquid path.
Key Features
- Four Standard Volume Ranges: Selectable models covering 0.5–5 mL, 1–10 mL, 2.5–25 mL, and 5–50 mL—each calibrated and certified per ISO 8655-3 with traceable documentation.
- Full Autoclavability: Entire dispensing head—including piston, sleeve, and valve assembly—can withstand steam sterilization at 121°C for 20 minutes without dimensional drift or seal degradation.
- Inert Fluid Path: Glass piston coated with PTFE; wetted parts composed of polypropylene, FEP, and EPDM-free elastomers—validated for compatibility with >95% of common lab solvents per ASTM D471 and USP / cytotoxicity/extraction protocols.
- Integrated Safety System: Patented groove-aligned discharge tube ensures mechanical interlock with safety cap; prevents accidental actuation during bottle mounting or transport. Dual-seal design minimizes vapor leakage during volatile solvent handling.
- Ergonomic & Tool-Free Adjustment: Knurled capacity dial enables precise volume setting with tactile feedback; no tools required for recalibration. Piston movement relies on thin liquid film lubrication—reducing operator fatigue during high-frequency dispensing.
Sample Compatibility & Compliance
The DISP-X is validated for use with liquids having viscosities up to 500 mPa·s and vapor pressures up to 100 kPa (e.g., acetone, methanol, 30% HCl, 50% NaOH, ethanol/water mixtures). It meets EN ISO 8655-3:2022 requirements for accuracy (±0.5% for full-scale volumes) and repeatability (CV ≤ 0.2%). All units ship with a Certificate of Conformance referencing NIST-traceable calibration standards. For regulated environments, the dispenser supports audit-ready documentation packages compliant with FDA 21 CFR Part 11 when integrated into electronic lab notebook (ELN) systems via optional barcode-scanned lot tracking.
Software & Data Management
While the DISP-X operates manually without embedded electronics, its design supports digital workflow integration. Each unit carries a unique alphanumeric serial number laser-etched onto the housing, enabling linkage to internal asset management databases. Optional Rainin Calibration Logbook templates (PDF/Excel) facilitate adherence to ISO/IEC 17025 clause 6.4.3 on equipment verification records. When used alongside Mettler Toledo’s LabX software platform, DISP-X usage logs—including bottle ID, dispense volume, operator ID, and timestamp—can be captured via manual entry or barcode scanning for full traceability in QC release processes.
Applications
- Preparation of standard solutions and calibration standards in analytical chemistry labs (e.g., ICP-MS, HPLC mobile phase preparation)
- Accurate dispensing of hazardous reagents (e.g., concentrated acids/bases) in fume hood environments
- Cell culture media and buffer preparation under aseptic conditions—validated for autoclave reuse in biosafety level 2 (BSL-2) facilities
- Forensic toxicology sample dilution where carryover prevention is critical
- Pharmaceutical stability study formulation dosing (e.g., forced degradation samples requiring exact volume increments)
FAQ
Is the DISP-X compatible with hydrofluoric acid (HF)?
No—HF attacks both glass and polypropylene. Use only with HF-compatible dispensers made from PFA or ETFE. Refer to Rainin’s chemical compatibility guide (Doc #RX-COMP-2024) for verified resistance data.
Can I replace the discharge tube with a flexible tip for narrow-necked containers?
Yes—Rainin offers interchangeable rigid and flexible discharge tubes (part numbers DX-TUBE-RIGID and DX-TUBE-FLEX), all featuring the same groove alignment mechanism for consistent installation.
Does the DISP-X require periodic recalibration?
Per ISO 8655-3, annual verification is recommended for routine QC use; more frequent checks are advised when handling high-value or regulated materials. Rainin-certified service centers provide recalibration with uncertainty reporting.
How do I clean the piston assembly after dispensing viscous glycerol solutions?
Disassemble the head per Instruction Manual Section 4.2; rinse piston and sleeve sequentially with isopropanol, then deionized water; air-dry vertically before reassembly. Avoid ultrasonic cleaning due to potential O-ring deformation.
Is there a version with digital volume display?
No—the DISP-X is intentionally analog to eliminate battery dependency, electromagnetic interference, and calibration drift. For digital readout requirements, consider the Rainin EDP series, which shares identical chemical compatibility and safety architecture.
