KJ GROUP WKYⅢ Series Single-Channel Adjustable-Volume Micropipette

Overview

The KJ GROUP WKYⅢ Series Single-Channel Adjustable-Volume Micropipette is an ISO 8655-compliant precision liquid handling instrument engineered for reproducible volumetric delivery across life science, clinical diagnostics, pharmaceutical QC, and academic research laboratories. Based on the positive displacement principle—where piston movement directly displaces air in a sealed chamber to aspirate and dispense liquid—the WKYⅢ series ensures traceable accuracy and long-term stability under routine benchtop use. Each model is factory-calibrated according to ISO 8655-2 (gravimetric testing) and validated against reference standards traceable to NIM (National Institute of Metrology, China). Designed for daily high-frequency operation, the pipette integrates mechanical robustness with human-centered ergonomics, minimizing operator-induced variability while maintaining full compliance with GLP documentation requirements.

Key Features

• Four-digit volume display with optimized viewing angle—enabling rapid, parallax-free reading under standard lab lighting conditions
• Low-force piano wire spring mechanism delivering consistent actuation force (≤1.2 N for full stroke at maximum volume), reducing hand fatigue during extended pipetting sessions
• Modular detachable lower shaft with hex-key accessible interface—facilitating full disassembly for ethanol-based sterilization and column cleaning without specialized tools
• Field-calibratable micro-adjustment screw—allowing fine-tuning of volume output within ±5% of nominal setting to compensate for tip variability or environmental drift
• Ergonomic hook-integrated handle—designed for secure vertical suspension on ISO-standard pipette racks, preserving workspace organization and preventing accidental tip contamination
• PTFE-fluorosilicone dual-seal system—providing >10⁶ cycles of leak-free operation at ambient temperature (20–25°C) and 40–60% RH
• Spring-loaded, self-centering conical tip interface—ensuring uniform tip seating depth and eliminating air-gap formation during aspiration
• ABS polymer housing with reinforced stress zones—tested to withstand 50,000+ actuations without structural deformation or hysteresis

Sample Compatibility & Compliance

The WKYⅢ series supports aqueous solutions, buffers, diluted acids/bases (pH 2–12), and low-viscosity organic solvents (e.g., ethanol, acetone, chloroform) when used with chemically resistant tips. It is not intended for highly volatile, viscous (>100 mPa·s), or corrosive liquids (e.g., concentrated HNO₃, HF) without tip and seal verification. All models conform to ISO 8655-1 (general requirements), ISO 8655-2 (performance testing), and ISO 8655-5 (calibration procedures). Traceability documentation—including individual calibration certificates, uncertainty budgets, and metrological chain statements—is provided with each unit. The design supports audit readiness for FDA 21 CFR Part 11 (when integrated with compliant LIMS), EU Annex 11, and WHO GMP Annex 4 environments.

Software & Data Management

While the WKYⅢ is a manually operated mechanical pipette (no embedded electronics), it is fully compatible with digital pipette management systems via optional barcode-labeled identification tags. Each unit carries a unique serial number etched into the body for integration into laboratory asset tracking platforms (e.g., LabVantage, Quartzy, or custom CMMS). Calibration logs, maintenance records, and usage history can be maintained in accordance with ISO/IEC 17025:2017 clause 7.7 (equipment management). Optional QR-coded calibration stickers support mobile scanning for real-time access to revision-controlled SOPs and historical performance data.

Applications

• Preparation of serial dilutions in ELISA, PCR master mix assembly, and cell culture media formulation
• Quantitative transfer in HPLC sample vial loading, dissolution testing, and residual solvent analysis
• Standard curve generation for spectrophotometric assays (e.g., BCA, Bradford) requiring sub-microliter precision
• QC sampling in biomanufacturing cleanrooms where tip-to-tip consistency must meet ICH Q5A specifications
• Teaching laboratories emphasizing hands-on technique training aligned with CLSI EP15-A3 guidelines

FAQ

Is the WKYⅢ Series compliant with ISO 8655?
Yes—each model undergoes full gravimetric verification per ISO 8655-2 and ships with a certificate referencing test conditions, uncertainty values, and traceability to national standards.
Can this pipette be autoclaved?
No—autoclaving is not recommended due to thermal sensitivity of fluorosilicone seals and ABS housing. Ethanol immersion (70%, 15 min) is the validated sterilization method.
What tip brands are compatible?
All ISO 8655-conforming universal-fit tips (e.g., Eppendorf, Gilson, Rainin, Socorex) are mechanically and functionally compatible.
How often should recalibration be performed?
Per ISO 8655-5, recalibration is recommended every 3–6 months for routine use, or after 10,000 actuations—whichever occurs first—and following any physical impact or exposure to extreme environmental conditions.
Does KJ GROUP provide calibration services?
Yes—accredited third-party calibration (ISO/IEC 17025) is available through KJ GROUP’s authorized service centers in Shanghai, Beijing, and Shenyang, with turnaround time of ≤5 business days.