Masterflex L/S Economical Variable-Speed Peristaltic Pump Model 07555-05 & 07555-15

Overview

The Masterflex L/S Economical Variable-Speed Peristaltic Pump (Models 07555-05 and 07555-15) is a compact, cost-optimized peristaltic drive engineered for reliable, pulse-free fluid transfer in general laboratory, pilot-scale, and light industrial applications. Based on the well-established L/S® platform, this drive utilizes roller-based peristaltic compression to achieve positive displacement without fluid contact with internal mechanical components—ensuring contamination-free operation and eliminating the need for valves, seals, or lubricants. Its brushless AC motor delivers consistent torque across the full speed range (2–600 rpm), enabling precise volumetric control via analog speed adjustment. Designed as a direct upgrade path from legacy models 07554-95 and 07554-85, it maintains full mechanical and electrical compatibility with the widely deployed L/S Easy-Load II pump head (77200-60), while supporting broader pump head interchangeability within the L/S family.

Key Features

• Single-knob analog speed control for intuitive, real-time flow rate adjustment (0.42–2900 mL/min, dependent on tubing size and pump head configuration)
• Dual-direction motor operation (clockwise and counterclockwise) to support bidirectional fluid handling and facilitate tubing cleaning or priming
• Front-panel LED indicator showing power-on status and operational readiness
• Dedicated front-mounted power switch for immediate local activation/deactivation
• DB9 serial interface enabling remote start/stop command integration into automated lab systems or PLC-controlled environments
• IP22-rated enclosure suitable for dry, indoor laboratory settings with limited dust and no direct water exposure
• Compact footprint (23 × 18.3 × 13.4 cm) optimized for benchtop use in space-constrained analytical or QC labs

Sample Compatibility & Compliance

The 07555-05 and 07555-15 drives are compatible with nine standard L/S pump head configurations—including Standard, Easy-Load®, Easy-Load II, Easy-Load 3, Multi-Channel, High-Efficiency, Cartridge, PTFE-Tubing, and PTFE-Diaphragm variants. However, due to mechanical design constraints, PTFE-Tubing and PTFE-Diaphragm pump heads are explicitly not recommended for use with these specific drive models (07555-05/-15); users requiring chemical resistance with aggressive solvents should select alternative drive models rated for such configurations. All tubing must be certified for peristaltic use and selected per ISO 3669 and ASTM D2240 hardness specifications to ensure consistent occlusion and service life. While the drive itself does not carry CE or UKCA marking, its 180–260 VAC input range supports global deployment when paired with region-specific power cords (IEC 320 C14 for 230 V; NEMA 5-15P for 115 V). It meets IEC 61000-6-3 (EMI emission) and IEC 61000-6-2 (immunity) requirements for laboratory equipment.

Software & Data Management

This analog-driven pump operates without embedded firmware or onboard data logging. Flow rate is controlled exclusively via manual speed setting, with repeatability maintained at ±5% under stable load and ambient conditions. For integration into regulated environments (e.g., GLP or GMP-compliant laboratories), external validation protocols must be implemented to document speed-to-flow correlation for each tubing/pump head combination. The DB9 interface supports TTL-level digital signals (active-low) for discrete remote control but does not provide analog feedback, real-time RPM telemetry, or USB/Ethernet connectivity. Users requiring audit-trail capabilities, electronic recordkeeping, or 21 CFR Part 11 compliance must implement third-party SCADA or LIMS interfaces with independent timestamped command logging.

Applications

• Continuous reagent delivery in spectrophotometric or colorimetric analyzers
• Media feeding in microbial culture systems and bioreactor inoculation loops
• Waste aspiration and wash buffer circulation in ELISA plate washers
• Low-pressure solvent transfer in preparative chromatography fraction collection
• Calibration standard dosing in environmental testing labs (e.g., EPA Method 200.7, 200.8)
• Feeding of particulate-laden suspensions where diaphragm or centrifugal pumps risk clogging

FAQ

Is the 07555-05 compatible with PTFE-tubing pump heads?

No. Masterflex explicitly advises against using PTFE-tubing or PTFE-diaphragm pump heads with models 07555-05 and 07555-15 due to insufficient torque and occlusion geometry. Select higher-torque L/S drives (e.g., 07556-xx series) for such applications.
What is the maximum allowable tubing wall thickness for the Easy-Load II pump head (77200-60)?

When used with this drive, the Easy-Load II head supports standard silicone or Viton tubing with wall thicknesses up to 0.070″ (1.78 mm), per Masterflex L/S tubing sizing charts (e.g., 14–24 gauge).
Does the pump include tubing or a pump head?

No. The 07555-05 and 07555-15 are drive-only units. Pump heads and tubing must be ordered separately based on flow, chemical compatibility, and pressure requirements.
Can the pump be operated continuously for 24/7 duty cycles?

Yes—provided ambient temperature remains ≤40 °C and the unit is installed in a well-ventilated area with unobstructed airflow around the ventilation grilles. Continuous operation at >450 rpm may reduce long-term motor bearing life.
Is calibration traceable to NIST standards?

The drive itself is not calibrated nor supplied with a NIST-traceable certificate. Flow calibration must be performed by the end user using gravimetric or timed-volume methods per ISO 80000-4 and ASTM D1193, with documentation aligned to internal QA procedures.