Masterflex® L/S® High-IP Digital Drive System

Overview

The Masterflex® L/S® High-IP Digital Drive System is an engineered solution for precise, repeatable, and hygienic fluid handling in demanding laboratory, pilot-scale process, and washdown-intensive environments. Built upon the proven Couette-flow principle of peristaltic pumping—where fluid is conveyed by sequential compression of elastomeric tubing—the system eliminates fluid contact with mechanical components, ensuring contamination-free transfer and eliminating the need for seals, valves, or lubricants. Its fully sealed NEMA 4X (IP66)-rated enclosure enables direct high-pressure rinsing with water, steam, or common disinfectants (e.g., 70% ethanol, 0.5% sodium hypochlorite, peracetic acid), making it suitable for applications governed by cGMP, GLP, and FDA 21 CFR Part 11 compliance frameworks where equipment traceability and environmental resilience are critical.

Key Features

• Robust NEMA 4X / IP66-rated housing designed for continuous operation in wet, corrosive, or sterile processing areas—including cleanrooms (ISO Class 5–8), bioreactor feed lines, and CIP/SIP systems.
• Brushless DC motor with closed-loop speed regulation ensures long-term stability, zero maintenance, and ±0.1% speed accuracy across its full 6000:1 turndown ratio (0.1–600 rpm typical range).
• Graphical LCD interface supports four programmable operating modes: Continuous Run, Timed Dispense (1 s–99 h 59 m 59 s), Repeat Dispense (1–9999 cycles), and Volume Dispense (0.001–99999 mL, L, or gallons) with integrated drip-prevention logic to eliminate post-dispense drooling.
• Seven-language menu navigation (English, Spanish, French, German, Italian, Chinese, Japanese) simplifies global deployment and operator training without firmware modification.
• Industrial-grade analog and digital I/O: isolated 0–20 mA / 4–20 mA / 0–10 V inputs for speed control and tachometer feedback; open-collector or dry-contact terminals for direction reversal, start/stop, and dedicated cleaning sequence activation.

Sample Compatibility & Compliance

The system is compatible with all standard Masterflex L/S®-series silicone, Viton®, Norprene®, and PharMed® BPT tubing (ID 0.13–13.0 mm), enabling validated flow performance across viscosities from deionized water (≈1 cP) to shear-thinning polymer solutions (up to ≈50,000 cP). Tubing selection directly determines maximum flow rate (0.006–3400 mL/min) and pressure capability (up to 40 psi). The drive system meets UL 61010-1, CE (EMC & LVD), and RoHS directives. When paired with USP Class VI-certified tubing and operated under documented SOPs, it supports applications requiring ISO 13485, ASTM D4169, and USP analytical instrument qualification protocols.

Software & Data Management

While the L/S® Digital Drive operates as a standalone unit, its analog/digital I/O architecture allows seamless integration into SCADA, DCS, or LabVantage-based data acquisition infrastructures. Tachometer output provides real-time rotational feedback for closed-loop flow verification; speed setpoint input enables dynamic rate modulation synchronized with upstream/downstream sensors (e.g., pH, conductivity, mass flow). Audit trails—including mode changes, volume dispensed, cycle counts, and error logs—are retained locally on the device and accessible via front-panel review. For regulated environments, external PLC logging satisfies 21 CFR Part 11 requirements for electronic records and signatures when paired with appropriate validation documentation.

Applications

• Automated reagent dispensing in clinical diagnostics and ELISA workflow stations.
• Media and buffer delivery in single-use bioprocessing skids and perfusion culture systems.
• Continuous sampling and dilution in online HPLC autosampler interfaces and IC systems.
• Controlled rinse cycles in automated glassware washers and chromatography column regeneration modules.
• Accurate metering of caustic, acidic, or solvent-based cleaning agents in CIP systems compliant with ASME BPE-2022 surface finish standards.

FAQ

What tubing sizes are supported?
The L/S® Digital Drive accommodates all L/S®-designated tubing with inner diameters from 0.13 mm to 13.0 mm, corresponding to flow ranges from microliter-per-minute to 54 GPH.
Can the drive be integrated into a PLC-controlled process line?
Yes—via its configurable 0–20 mA / 4–20 mA / 0–10 V analog I/O and open-collector control terminals, enabling full remote start/stop, direction, cleaning, and speed modulation.
Is calibration required for volumetric dispensing accuracy?
Volumetric accuracy depends on tubing wear, occlusion pressure, and fluid properties; users must perform periodic gravimetric or volumetric verification per ASTM E542 and document results as part of IQ/OQ/PQ protocols.
Does the system support password-protected parameter locking?
No—parameter access is unrestricted at the front panel; administrative controls must be enforced externally via PLC-level permission management or network-level firewall policies.
What cleaning agents are validated for use with the enclosure?
The NEMA 4X housing has been tested with 70% isopropyl alcohol, 0.5% sodium hypochlorite, 1–2% phosphoric acid, and saturated steam at ≤121°C for ≤15 minutes—per manufacturer’s Material Compatibility Guide #MFLS-2023-04.