Masterflex L/S Digital Variable-Speed Peristaltic Pump Model 07522-20

Overview

The Masterflex L/S Digital Variable-Speed Peristaltic Pump Model 07522-20 is an industrial-grade, microprocessor-controlled peristaltic pump engineered for high-precision fluid handling in analytical, bioprocessing, and quality control laboratories. Operating on the principle of positive displacement via roller compression of flexible tubing—commonly referred to as the “peristaltic” mechanism—the pump delivers contamination-free, pulse-dampened flow without exposing fluids to valves, seals, or internal wetted surfaces. Its brushless DC motor eliminates carbon brush wear and ensures long-term speed stability, while the PWM-based speed regulation maintains repeatability within ±0.1% across the full 0.1–600 rpm range. Designed for integration into automated workflows, the 07522-20 supports both local operation via its intuitive graphical LCD interface and remote control via analog (0–10 V, 0–20 mA, 4–20 mA) or digital (dry-contact) signals through its standard DB25 female port.

Key Features

• Graphical LCD display with menu-driven navigation supporting seven selectable languages (English, Spanish, French, German, Italian, Portuguese, Chinese)
• Four programmable operating modes: Continuous Run, Timed Dispense, Repetitive Dispense, and Volume-Based Dispense
• Volume dispense range: 0.001–9999 mL per aliquot; Repetition count: 1–9999 cycles; Time interval between cycles: up to 99:59:59 (hh:mm:ss)
• Integrated pump tube calibration memory: stores flow correction factors for multiple L/S-series tubing sizes (e.g., L/S 13–L/S 36), enabling traceable volumetric accuracy
• Bi-directional motor operation for forward/reverse priming and tubing cleaning—critical for cross-contamination mitigation in multi-sample workflows
• Stackable chassis design with IP33-rated ABS housing (splash- and dust-resistant); suitable for benchtop deployment in ISO Class 7–8 cleanrooms and regulated QC environments
• Film-keypad with lock/unlock function prevents accidental parameter modification during routine operation
• Remote I/O capability includes start/stop, direction control, wash command, and pulse tachometer output (open-collector or analog)

Sample Compatibility & Compliance

The 07522-20 is compatible with all Masterflex L/S-series tubing—including standard, Easy-Load®, Easy-Load II®, Easy-Load 3®, and multi-channel configurations—enabling seamless adaptation to diverse flow rate and chemical compatibility requirements. Tubing selection directly determines maximum flow capacity: for example, L/S 36 tubing achieves up to 2900 mL/min at 600 rpm, while L/S 13 supports ultra-low flows down to 0.006 mL/min. All tubing materials (e.g., PharMed® BPT, Norprene®, Viton®) comply with USP Class VI, FDA 21 CFR 177.2600, and EU Regulation (EC) No. 1935/2004 for food-contact applications. The pump’s architecture supports GLP/GMP-aligned operation: audit trails are maintained via manual logbook entries, and optional NIST-traceable calibration certification (P/N 17050-01) provides documented metrological traceability for regulatory submissions.

Software & Data Management

While the 07522-20 operates autonomously without host software, its DB25 interface enables deterministic integration with PLCs, SCADA systems, or custom LabVIEW/Python-based control platforms. Analog input channels accept standardized industrial signals (e.g., 4–20 mA from level sensors), allowing closed-loop flow regulation. Pulse output supports real-time RPM verification and totalized volume tracking when paired with external counters. For validation purposes, the device supports IQ/OQ documentation templates aligned with ASTM E2500 and ISO/IEC 17025 guidelines. Firmware updates are performed via proprietary Masterflex utility tools—not web-based interfaces—ensuring data integrity and minimizing cybersecurity exposure in regulated lab networks.

Applications

• Pharmaceutical manufacturing: Aseptic buffer transfer, media preparation, and fill-finish line priming under cGMP conditions
• Clinical diagnostics: Automated reagent dispensing in ELISA, PCR setup, and hematology analyzers
• Environmental testing: Continuous sampling of wastewater streams with programmable time-weighted averaging
• Food & beverage QA: Precise ingredient dosing in viscosity-sensitive formulations (e.g., dairy stabilizers, plant-based emulsions)
• Academic research: Controlled perfusion in organ-on-chip systems and microfluidic cell culture platforms
• Chemical synthesis: Reagent addition in exothermic reactions where isolation from drive electronics is essential

FAQ

What tubing sizes are supported—and how does tubing selection affect flow accuracy?
The 07522-20 accepts all L/S-series tubing (13–36), with flow capacity and resolution determined by inner diameter and wall thickness. Calibration coefficients for each size are stored internally to compensate for non-linear compression effects.
Can this pump be integrated into a 21 CFR Part 11-compliant system?
Yes—when deployed with validated electronic records (e.g., timestamped CSV logs from external DAQ hardware) and procedural controls (SOPs, access restrictions), it meets Part 11 requirements for electronic signatures and audit trails.
Is the DB25 interface compatible with common industrial PLCs?
Yes—standard dry-contact and analog signal definitions align with Siemens S7, Allen-Bradley CompactLogix, and Omron NJ series I/O modules.
What maintenance is required for long-term reliability?
No scheduled motor maintenance is needed due to brushless design; periodic visual inspection of rollers and tubing compression is recommended per ASTM D3418.
Does the unit include factory calibration documentation?
A basic operational verification report is included; NIST-traceable calibration (P/N 17050-01) is available as a separately ordered option.