Masterflex 77913-70 L/S® Digital Precision Modular Peristaltic Pump with Remote I/O and Easy-Load II Pump Head

Overview

The Masterflex 77913-70 is a digitally controlled, modular peristaltic pump system engineered for precision fluid handling in regulated laboratory and industrial environments. Based on the well-established L/S® (Liquid/Solution) platform, it operates on the principle of positive displacement via roller compression of elastomeric tubing—eliminating fluid contact with mechanical components and ensuring contamination-free transfer. Its split architecture separates the motor drive unit from the control electronics, enabling flexible installation in confined spaces, glove boxes, or remote process enclosures. Designed for reproducible volumetric delivery, the system delivers speed stability of ±0.25% across its full 6–600 rpm range, supporting applications requiring trace-level dosing, continuous infusion, or bidirectional recirculation. The pump complies with fundamental electrical safety standards (IEC 61000-6-3, IEC 61000-6-2) and meets IP33 ingress protection for splash resistance—suitable for benchtop use in ISO Class 5–8 cleanrooms and general-purpose QC labs.

Key Features

• Modular split design: Independent mounting of drive motor and controller enables spatial optimization—ideal for integration into OEM systems or fume hoods.
• Digital speed control with three-digit LED display: Real-time rpm readout allows rapid verification and fine-tuning of rotational velocity without external instrumentation.
• Bidirectional operation: Reversible motor direction supports tube priming, backflushing, and closed-loop circulation protocols—critical for analytical sample preparation and reagent recovery.
• Easy-Load II pump head (77200-62): Tool-free tubing loading/unloading with visual alignment guides and consistent occlusion pressure—reducing operator variability and extending tubing service life.
• Wide flow versatility: Delivers 0.06–3400 mL/min depending on selected L/S® tubing size (15, 24, 35, or 36) and rotational speed—validated for both low-flow microsampling and high-throughput media transfer.
• Remote I/O interface: DB9 female connector on rear panel supports TTL-level start/stop, direction, and analog speed modulation—enabling seamless integration with PLCs, SCADA systems, or custom LabVIEW applications.
• Robust power architecture: Universal 90–260 VAC input with auto-sensing 50/60 Hz operation ensures stable performance across global laboratory power infrastructures.

Sample Compatibility & Compliance

The 77913-70 is compatible with certified L/S®-series silicone and thermoplastic elastomer tubing—including C-FLEX® ULTRA® (06434-24), which exhibits low extractables, USP Class VI compliance, and resistance to hydrolysis and oxidation. Tubing selection directly determines chemical compatibility, pulse dampening, and maximum pressure rating (up to 30 psi for L/S 36). The system supports GLP/GMP workflows through deterministic speed control and repeatable occlusion geometry—facilitating audit-ready documentation when paired with validated SOPs. While not inherently 21 CFR Part 11 compliant, its digital control architecture permits integration with compliant data acquisition platforms that provide electronic signatures, audit trails, and user access controls.

Software & Data Management

This model operates as a standalone hardware device without embedded firmware-based software. All operational parameters are set locally via front-panel buttons and displayed on the integrated LED screen. For automated data capture, the DB9 remote I/O port provides analog voltage output (0–10 V) proportional to actual rpm and TTL-compatible digital signals for status monitoring. Integration with third-party software (e.g., MATLAB, Python-based control scripts, or commercial SCADA suites) is achieved using standard serial-to-USB adapters or industrial I/O modules. No proprietary drivers or cloud services are required—ensuring long-term maintainability and cybersecurity resilience in air-gapped lab networks.

Applications

• Pharmaceutical QC: Precise delivery of solvents and standards in HPLC mobile phase preparation and dissolution testing.
• Biotechnology: Sterile media transfer in upstream bioreactor feed lines and downstream buffer exchange systems.
• Environmental analysis: Continuous sampling of aqueous effluents into autosamplers or online analyzers (e.g., IC, TOC).
• Food & beverage R&D: Controlled addition of enzymes, acids, or colorants during pilot-scale formulation trials.
• Academic research: Teaching fluid dynamics principles, pump calibration studies, and microfluidic interfacing experiments.
• Industrial process support: Dosing of corrosion inhibitors, pH adjusters, or coagulants in pilot water treatment skids.

FAQ

Does this pump support continuous duty operation?
Yes—the 07557-00 drive motor is rated for indefinite continuous operation at any speed within the 6–600 rpm range, provided ambient temperature remains below 40°C and ventilation is unobstructed.
Can I replace the included C-FLEX® ULTRA® tubing with other materials?
Yes, but only with tubing certified for L/S® pump heads (inner diameters matching L/S 15–36 specifications) and validated for your specific fluid chemistry and pressure requirements.
Is the DB9 remote I/O interface optically isolated?
No—signals are direct TTL-level and require proper grounding when interfacing with sensitive control systems; an external isolation module is recommended for high-noise industrial environments.
What is the expected service life of the Easy-Load II pump head rollers?
Under normal operating conditions (≤600 rpm, clean fluids, appropriate tubing), roller assemblies typically exceed 10,000 hours of service before replacement is advised.
Does Masterflex provide calibration certificates for this model?
Factory calibration is performed per internal Masterflex procedure; NIST-traceable calibration certificates are available upon request as a value-added service—not included standard.