Metler Toledo RAININ Pipet-X Electronic Pipette Controller

Overview

The Mettler Toledo RAININ Pipet-X Electronic Pipette Controller is an engineered solution for precise, reproducible, and ergonomic liquid handling across demanding laboratory environments. Designed around the principles of controlled aspiration and dispensing dynamics, the Pipet-X employs a brushless DC motor coupled with real-time pressure feedback to regulate airflow—enabling consistent volumetric control across viscous, volatile, foaming, or particulate-laden liquids. Unlike manual controllers relying on thumb pressure or basic electronic units with fixed-speed motors, the Pipet-X delivers continuously variable aspiration and dispensing speed via analog pressure-sensitive controls. This allows operators to maintain laminar flow during aspiration of cell suspensions or serum, minimize aerosol generation when handling ethanol or chloroform, and prevent splashing during high-volume dispensing into narrow vessels. Its architecture supports compliance with GLP and GMP workflows through traceable operation, battery-life monitoring, and contamination mitigation design.

Key Features

• Continuous variable speed control via responsive pressure-sensitive buttons—enabling fine-tuned adjustment from gentle aspiration of fragile primary cells to rapid bulk transfer of buffer solutions
• Dual dispensing mode selection: gravity-fed for low-shear applications (e.g., stem cell passaging) and motor-driven for repeatable, volume-accurate delivery (e.g., QC sample preparation)
• Ergonomically contoured handheld housing with balanced weight distribution and non-slip textured grip—validated for extended use in biosafety cabinets and laminar flow hoods
• Integrated 0.2 µm hydrophobic PTFE filter positioned upstream of the motor and electronics, preventing moisture ingress, aerosol carryover, and internal corrosion
• Smart NiMH battery system with LED state-of-charge indicator and automatic charge termination—supports up to 8 hours of continuous operation and hot-swappable charging without requiring a dedicated cradle
• Universal compatibility with Class A and ASTM E969-compliant serological pipettes (0.1–100 mL), including borosilicate glass, polystyrene, and polypropylene formats

Sample Compatibility & Compliance

The Pipet-X is validated for use with aqueous buffers, cell culture media, serum, glycerol solutions (up to 50% v/v), ethanol, isopropanol, and diluted acidic/basic reagents (pH 2–12). It is not intended for use with strong oxidizers (e.g., concentrated HNO₃), halogenated solvents (e.g., chloroform, DCM), or highly viscous silicone oils (>500 cP). Device construction complies with IEC 61010-1:2010 for electrical safety in laboratory equipment. Filter integrity meets ISO 13408-1 requirements for sterile barrier performance. The unit supports audit-ready workflows under FDA 21 CFR Part 11 when integrated with compliant LIMS or ELN systems—leveraging timestamped operational logs and user-accessible firmware version reporting.

Software & Data Management

While the Pipet-X operates as a standalone controller without embedded software, its mechanical and electrical design facilitates integration into regulated environments. All operational parameters—including motor duty cycle, filter usage time (estimated via runtime tracking), and battery health—are accessible via diagnostic mode (activated by simultaneous button press sequence). Firmware updates are delivered via USB-C port using RAININ-certified configuration tools. Calibration verification reports align with ISO/IEC 17025 and ASTM E1154 standards, and documentation packages include Certificate of Conformance, Filter Performance Summary, and Electromagnetic Compatibility (EMC) test reports per EN 61326-1.

Applications

• Cell culture maintenance: Aspiration and dispensing of trypsin-EDTA, complete growth media, and conditioned supernatants without shear-induced lysis
• QC/QA laboratories: Reproducible preparation of calibration standards and reference materials across 0.1–100 mL ranges
• Bioprocessing support: Transfer of harvest broth, clarified lysates, and chromatography fractions under controlled flow conditions
• Microbiology: Handling turbid bacterial cultures and fungal suspensions where foam suppression and sediment resuspension control are critical
• Educational labs: Teaching volumetric technique fundamentals with immediate tactile feedback and reduced operator fatigue

FAQ

What pipette types are compatible with the Pipet-X?
Standard taper serological pipettes (0.1–100 mL) made of borosilicate glass or medical-grade plastics meeting ASTM E969 and ISO 648 specifications.
Can the Pipet-X be used in a Class II biosafety cabinet?
Yes—the low-noise motor, sealed electronics, and ergonomic form factor are optimized for unrestricted use inside BSCs and laminar flow hoods.
Is the 0.2 µm filter replaceable, and how often should it be changed?
Filters are field-replaceable; replacement frequency depends on usage intensity and liquid type—typically every 3–6 months under routine cell culture operations.
Does the Pipet-X require annual recalibration?
No formal recalibration is required; however, users must perform periodic verification per ISO 8655-9 using gravimetric or photometric methods at defined volumes (e.g., 10%, 50%, and 100% of max capacity).
Is the device compatible with USP or compounding requirements?
When used with validated filters and documented cleaning procedures, the Pipet-X meets environmental control expectations for low-risk and medium-risk compounding activities.