Brand PLT Unit Pipette Leak Tester

Overview

The Brand PLT Unit Pipette Leak Tester is an engineered diagnostic instrument designed specifically for rapid, non-destructive detection of micro-leakage in air-displacement pipettes. It operates on the principle of differential pressure decay measurement: a precisely controlled vacuum is applied to the pipette’s internal air column (with or without tip attached), and the system monitors pressure stabilization over time. Any deviation from expected decay kinetics—indicative of gas-phase leakage across seals, piston surfaces, or tip-cone interfaces—is quantified and reported within seconds. Unlike gravimetric calibration, which assesses volumetric accuracy under dispensing conditions, the PLT Unit isolates mechanical integrity as a prerequisite for metrological reliability. This makes it indispensable for laboratories operating under ISO/IEC 17025, CLIA, or GLP frameworks where documented evidence of pipette functional status between formal calibrations is required.

Key Features

• Patented pressure-decay detection technology registered under European Patent EP3243082B1
• Pre-programmed pass/fail thresholds for single- and multi-channel air-displacement pipettes across the full commercial volume range (1 µL to 10 mL)
• Tip-on and tip-off testing modes—enabling isolation of tip-seal integrity versus internal piston seal failure
• Real-time pressure decay curve visualization via integrated LED status indicators (green = pass; amber = marginal; red = fail)
• Compact benchtop footprint (220 × 160 × 120 mm) with low-power consumption (<5 W) and universal AC input (100–240 V, 50/60 Hz)
• No consumables beyond replaceable PE filter elements (included); no software installation or PC dependency

Sample Compatibility & Compliance

The PLT Unit is compatible with all major-brand air-displacement pipettes—including Eppendorf, Gilson, Thermo Fisher, Rainin, and Brand’s own accu-jet® and transferpette® lines—regardless of channel configuration (single, 8-, 12-, or 16-channel). It accommodates standard conical tip geometries (ISO 8655-2 compliant) and accepts both filtered and unfiltered tips during testing. While not a replacement for ISO 8655-6 gravimetric verification, the PLT Unit fulfills the preventive maintenance requirement outlined in ISO 8655-5 (Clause 6.3.2) for “intermediate functional checks.” Its test protocol aligns with ASTM E2758-20 Annex A1 guidance on leak screening prior to volumetric validation. Each unit ships with a traceable Certificate of Conformance, including factory verification against NIST-traceable pressure standards.

Software & Data Management

The PLT Unit is a standalone hardware device with no embedded firmware updates, cloud connectivity, or proprietary software. Test outcomes are binary (pass/fail) and communicated visually—eliminating subjective interpretation and ensuring operator-independent results. For laboratories requiring audit trails, manual logging into electronic lab notebooks (ELN) or LIMS is supported via standardized entry fields: date/time, pipette ID, volume setting, tip status (attached/detached), and result. The absence of digital data export intentionally avoids 21 CFR Part 11 compliance complexity while maintaining full compatibility with paper-based or ELN-integrated quality records per ISO 15197 and CAP checklist GEN.41520.

Applications

• Routine pre-use verification in QC/QA labs performing pharmaceutical assay development (e.g., ELISA, qPCR, cell culture media preparation)
• Troubleshooting unexplained precision drift during ISO 8655-6 calibration cycles
• Root-cause analysis of high CV% in low-volume liquid handling workflows (≤10 µL)
• Verification of piston refurbishment or seal replacement efficacy
• Training tool for demonstrating the impact of tip fit, plunger mechanics, and environmental humidity on air-displacement fidelity

FAQ

Does the PLT Unit replace gravimetric calibration?
No. It is a functional integrity screener—not a volumetric accuracy verifier—and must be used in conjunction with periodic ISO 8655-6 gravimetric calibration.
Can it detect leaks in positive-displacement pipettes?
No. The PLT Unit is validated exclusively for air-displacement mechanisms and is incompatible with capillary or syringe-based systems.
How often should leak testing be performed?
Daily for high-throughput clinical labs; before each shift in regulated GMP environments; and immediately after mechanical impact or tip ejection force anomalies.
Are replacement filters available separately?
Yes—PE filter cartridges (P/N PLT-FIL-03) are sold in packs of 10 and certified for ≥500 test cycles per element.
Is the device CE-marked and RoHS-compliant?
Yes. It carries CE marking under Directive 2014/30/EU (EMC) and 2011/65/EU (RoHS), with full technical documentation available upon request.