CoMetro CP-M Series Precision Constant Flow Pump

Overview

The CoMetro CP-M Series Precision Constant Flow Pump is an electronically controlled, positive-displacement peristaltic-free pump engineered for high-pressure, low-pulsation liquid delivery in analytical, synthetic, and process-oriented laboratory environments. Unlike conventional peristaltic or syringe-based systems, the CP-M employs a robust motor-driven piston architecture integrated with a low-inner-volume pulsation-dampening accumulator and non-contact pressure transduction. This architecture enables true constant-flow operation under dynamic backpressure conditions—critical for applications demanding stable volumetric delivery across variable system resistance, such as preparative HPLC, continuous-flow chemistry, catalyst screening, and microreactor feeding. Its design adheres to fundamental principles of fluid mechanics and closed-loop flow control, where real-time electronic compensation adjusts motor torque and stroke timing to maintain setpoint fidelity within ±2% accuracy and ≤0.2% RSD—even at maximum rated pressure of 6000 psi.

Key Features

• High-pressure capability up to 6000 psi (414 bar), supporting demanding applications including supercritical fluid delivery and high-viscosity reagent pumping.
• Ultra-low pulsation performance achieved via a suspended pump head configuration, energy-storing accumulator, and rapid-fill valving—eliminating flow discontinuities without reliance on external dampeners.
• Non-contact pressure sensing provides continuous, drift-free monitoring and enables programmable high/low pressure limits with automatic shutdown and alarm signaling.
• Dual-control flexibility: local operation via intuitive keypad interface or remote command via RS232 serial protocol—including analog voltage/frequency input for integration into PLC- or DAQ-controlled workflows.
• Chemically resistant fluid path options: electropolished 316 stainless steel or inert PEEK—validated for compatibility with organic solvents, aqueous buffers, corrosive reagents, and biologics.
• Integrated self-cleaning module and internal bypass valve support routine maintenance and system priming without disassembly.

Sample Compatibility & Compliance

The CP-M Series accommodates a broad range of sample types—from volatile organics and aggressive acids to protein-containing formulations—without degradation or adsorption artifacts, thanks to its inert wetted materials and absence of elastomeric tubing or seals in the primary flow path. It complies with general laboratory safety standards for electrical equipment (IEC 61010-1) and supports audit-ready operation when paired with validated software control systems. While not intrinsically certified for hazardous area use, its sealed electronics and non-sparking motor design meet requirements for Class I, Division 2 environments when installed per local codes. For regulated industries, the pump’s programmable pressure thresholds, real-time status reporting, and RS232 data logging capability facilitate alignment with GLP/GMP documentation practices and FDA 21 CFR Part 11-compliant data acquisition platforms (when implemented with appropriate software validation).

Software & Data Management

The CP-M Series supports bidirectional communication via RS232, enabling full parameter control—including flow rate, pressure limits, run duration, and alarm thresholds—from external PCs or industrial controllers. ASCII-based command protocols allow seamless integration into LabVIEW, Python-based automation suites, or custom SCADA interfaces. All operational states—including actual flow, measured pressure, motor load, and fault codes—are transmitted in real time. When connected to compliant data acquisition systems, timestamped event logs (e.g., pressure excursions, limit triggers, power cycles) can be archived for traceability. Optional firmware updates extend functionality, including multi-step gradient programming and synchronized start/stop with detector or reactor triggers.

Applications

• Preparative and analytical chromatography requiring precise, pulse-free eluent delivery under high backpressure.
• Continuous-flow synthesis and catalysis studies where stoichiometric reagent ratios must be maintained over extended durations.
• Microfluidic platform priming and long-term perfusion of organ-on-chip or cell culture systems.
• Calibration and verification of flow meters, sensors, and dispensing systems in metrology labs.
• Teaching laboratories for fluid dynamics, process control, and instrumentation courses—featuring transparent operational feedback and manual/automated mode switching.
• Environmental testing setups involving leachate delivery, soil column percolation, or corrosion inhibitor dosing.

FAQ

What flow rate ranges are available across the CP-M model variants?

The CP-M series includes models covering 0.001–5 mL/min (CP-M205/305), 0.01–10 mL/min (CP-M210/310), and 0.1–50 mL/min (CP-M250/350), with corresponding pressure ratings of 6000 psi or 1500 psi depending on displacement volume.
Is the pump compatible with aggressive solvents such as THF, DCM, or concentrated acids?

Yes—when configured with 316 stainless steel or PEEK fluid paths, the CP-M demonstrates compatibility with common organic solvents, halogenated compounds, and mineral acids below specified concentration and temperature thresholds; full chemical resistance data sheets are available upon request.
Does the CP-M support remote start/stop and flow adjustment via analog signal?

Yes—models support 0–5 V DC or 4–20 mA analog input for proportional flow control, alongside discrete TTL-level start/stop triggering.
Can pressure and flow data be logged continuously during operation?

Yes—via RS232, all real-time parameters (flow, pressure, status flags) are streamable at user-defined intervals; third-party software or custom scripts may capture and timestamp this data for compliance archiving.
What maintenance is required to ensure long-term flow accuracy?

Routine verification using gravimetric or timed-volume methods is recommended quarterly; the self-cleaning module reduces particulate accumulation, and the absence of consumable tubing eliminates periodic replacement cycles typical of peristaltic systems.