Masterflex CL Peristaltic Pump (No Display, Single-Channel, Model 77122-00)

Overview

The Masterflex^® CL Peristaltic Pump (Model 77122-00) is a compact, single-channel, manually controlled peristaltic pump engineered for precision fluid handling in analytical, pharmaceutical, and research laboratory environments. Operating on the principle of occlusion-based positive displacement, it delivers accurate, contamination-free flow by compressing flexible tubing between rotating rollers and a rigid housing—ensuring complete isolation of the fluid path from pump mechanics. Designed without an integrated digital display, this model relies on analog speed control via a calibrated single-turn knob and discrete directional switching, making it ideal for applications requiring simplicity, reliability, and minimal electromagnetic interference. Its integrated motor-pump head architecture eliminates alignment variability and enhances mechanical stability, while the PPS thermoplastic housing and stainless-steel pump head provide chemical resistance and long-term dimensional integrity under routine lab conditions.

Key Features

• Manual analog speed control (10–60 rpm) with ±5% speed accuracy across the full range—enabling reproducible flow rates without digital drift or calibration dependency.
• Bidirectional permanent-magnet DC motor allows forward/reverse operation for pre- and post-pumping tube rinsing, minimizing carryover and supporting closed-loop recirculation protocols.
• Integrated 4-roller pump head fabricated from corrosion-resistant stainless steel and precisely molded PPS, delivering low-pulse flow profiles and consistent occlusion geometry without user adjustment.
• Dedicated MAX button provides momentary full-speed operation (60 rpm) for rapid priming, line purging, or tubing flush—critical for method transfer and system validation.
• Front-panel toggle switch (CW / OFF / CCW) with green LED power indicator maintains set speed during direction reversal or power cycling—preserving operational continuity.
• Remote dry-contact interface (located on rear panel) supports integration into automated systems, PLC-controlled workflows, or safety interlock circuits per IEC 61000-6-2/6-4 standards.
• 1/4-DIN footprint (17.8 × 9.5 × 8.9 cm) enables stackable benchtop use or rack-mount installation using optional bracket 77120-03—supporting modular instrument design in regulated environments.
• IP22-rated enclosure protects against vertically dripping water and solid objects >12.5 mm, meeting general-purpose indoor laboratory environmental requirements (IEC 60529).

Sample Compatibility & Compliance

This pump is designed for use with a broad spectrum of chemically compatible tubing materials—including Tygon® LFL, Pharmed® BPT, C-Flex®, platinum-cured silicone, and Viton®—each selected per USP Class VI, FDA 21 CFR Part 177, and ISO 10993-5 biocompatibility guidelines where applicable. The standard-supplied Tygon LFL tubing (ID 0.89 mm) offers extended service life (>1,000 hours at 50 rpm with aqueous solutions) and low extractables—validated for QC/QA applications in pharmaceutical manufacturing. With inlet lift capability of 1.5 m and discharge head up to 6.1 m (max outlet pressure 1 bar), the pump accommodates gravity-fed reservoirs and pressurized downstream manifolds alike. All electrical components comply with UL 61010-1, CSA C22.2 No. 61010-1, EN 61010-1, and CE marking directives for laboratory equipment. Documentation packages support GLP/GMP audit readiness, including factory test reports and RoHS/REACH declarations.

Software & Data Management

The CL series operates as a stand-alone analog device and does not require proprietary software or drivers. However, its remote dry-contact interface enables seamless integration with third-party data acquisition systems (e.g., LabVIEW™, MATLAB®, or SCADA platforms) for time-stamped event logging, pump state monitoring, and synchronized process control. When deployed in validated environments, the absence of embedded firmware simplifies 21 CFR Part 11 compliance—eliminating requirements for electronic signature validation, audit trail configuration, or software version control. All mechanical parameters (speed, direction, runtime) remain traceable via external PLC logs or manual logbook entries aligned with SOP-024 (Equipment Usage Recordkeeping).

Applications

• Automated sample introduction for HPLC, IC, and flow injection analysis (FIA) systems requiring pulse-dampened, low-shear delivery.
• Media perfusion in cell culture bioreactors and microfluidic organ-on-chip platforms where sterility and tubing change frequency are critical.
• Reagent dosing in clinical chemistry analyzers and ELISA wash stations—compatible with ISO 15197:2013 accuracy thresholds for low-volume dispensing.
• Continuous extraction workflows in environmental testing labs (e.g., EPA Method 3510C), where solvent compatibility and leak-free operation are mandated.
• In-line calibration standard delivery in water quality monitoring systems compliant with ASTM D511/D4192 for calcium/magnesium ion quantification.

FAQ

Does this pump support regulatory-compliant audit trails?
As a non-programmable, analog-only device with no internal memory or firmware, it inherently satisfies 21 CFR Part 11 requirements for “non-electronic records” when used with externally logged operational events.

Can the pump head be disassembled for cleaning or maintenance?
No—the motor and pump head are permanently integrated per design; cleaning is limited to exterior surfaces and tubing replacement. Internal roller assemblies are sealed and not field-serviceable.

What tubing options are recommended for high-purity pharmaceutical applications?
Pharmed® BPT tubing (USP Class VI, ISO 10993-5) is preferred for parenteral-grade fluid paths; Tygon LFL is suitable for non-sterile buffer delivery in API synthesis.

Is a 12 V DC version available?
Yes—custom configurations with 12 V DC input are available upon request; contact technical support for lead time and qualification documentation.

How is flow rate calibrated without a digital display?
Flow is determined empirically using gravimetric or volumetric collection over timed intervals, referenced to published flow vs. rpm vs. tubing ID charts (provided in the Masterflex CL Technical Manual Rev. D).