CoMetro CP-M Series High-Precision Temperature-Controlled Piston Pump

Overview

The CoMetro CP-M Series High-Precision Temperature-Controlled Piston Pump is an engineered solution for applications demanding simultaneous high-pressure liquid delivery, micro-accurate flow regulation, and precise thermal management of the fluid path. Designed around a dual-piston, reciprocating positive-displacement architecture, the pump operates on proven Couette-flow displacement principles—ensuring volumetric consistency independent of backpressure fluctuations up to 42 MPa (6000 psi). Unlike conventional isocratic or gradient pumps with passive thermal behavior, the CP-M integrates a fully active, PID-regulated temperature control system that thermally stabilizes the entire wetted flow path—including inlet manifold, pump head cavity, check valves, and outlet tubing—within ±0.5°C of setpoint. This eliminates thermal expansion-induced flow drift, solvent viscosity hysteresis, and phase-transition artifacts in temperature-sensitive separations or reaction-coupled chromatography. Its mechanical design incorporates suspended pump-head mounting, integrated pulse-dampening chambers, rapid-fill priming logic, and chemically inert 316L stainless steel fluidic components—making it suitable for long-duration operation with aggressive organic solvents (e.g., THF, chloroform, DMSO), aqueous buffers, and biocompatible formulations.

Key Features

• Active thermal management across full fluidic path: inlet, pump chamber, and outlet—maintained within ±0.5°C via embedded PID-controlled heating elements and real-time thermistor feedback
• Dual-piston, seal-less ceramic-coated plunger assembly with low-compliance drive train for sub-microliter per minute resolution (down to 0.001 mL/min) and ≤0.2% RSD precision at steady state
• Pressure-rated to 42 MPa (6000 psi) with integrated pressure transducer and programmable overpressure cutoff compliant with ISO 17025 mechanical safety protocols
• Modular analog/digital I/O: RS232 serial interface for SCADA integration; 0–5 V / 0–10 kHz analog inputs for external flow/temperature synchronization
• Front-panel touchscreen interface with dual-parameter display (set flow rate + actual temperature) and non-volatile parameter storage for method recall
• Self-diagnostic firmware with automatic valve sequencing, leak detection logic, and motor stall monitoring aligned with IEC 61508 functional safety guidelines

Sample Compatibility & Compliance

The CP-M Series is validated for continuous use with Class II and III solvents per ASTM D471, including acetonitrile, methanol, ethyl acetate, and concentrated phosphoric acid solutions (pH 0–14). All wetted surfaces are electropolished 316L stainless steel, certified to ASTM A276 and compliant with USP Class VI biocompatibility requirements for research-grade biofluid handling. The pump meets CE marking requirements under the EU Machinery Directive 2006/42/EC and electromagnetic compatibility standards EN 61326-1. For regulated environments, audit-trail-capable firmware supports 21 CFR Part 11–compliant electronic records when paired with validated host software—enabling GLP/GMP traceability in pharmaceutical QC labs and contract research organizations.

Software & Data Management

CoMetro’s proprietary PumpControl Suite (v3.2+) provides native Windows/Linux support for remote configuration, real-time flow/temperature trending, and method-based parameter locking. The software logs timestamped operational metadata—including motor current draw, pressure deviation history, thermal ramp profiles, and valve actuation counts—into encrypted SQLite databases with SHA-256 hash integrity verification. Export formats include CSV, PDF analytical reports, and XML schema-compatible datasets for LIMS ingestion. Optional OPC UA server module enables seamless integration into Siemens Desigo, Rockwell FactoryTalk, or LabVantage platforms without middleware translation layers.

Applications

• Preparative and analytical HPLC systems requiring temperature-stabilized mobile phase delivery—particularly for chiral separations, polymer characterization (SEC/GPC), and temperature-gradient elution methods
• Catalytic reaction monitoring setups where reagent feed temperature directly influences kinetics (e.g., asymmetric hydrogenation, flow photochemistry)
• Microreactor and chip-based lab-on-a-chip platforms needing <1 µL/min flow stability under variable backpressure
• Calibration laboratories performing gravimetric flowmeter validation per ISO 4064-2 and NIST SP 250-95
• Academic teaching labs demonstrating fluid mechanics principles, pump cavitation thresholds, and thermal-viscous coupling effects

FAQ

Does the CP-M Series support gradient elution with binary solvent mixing?
Yes—the CPT model is configured as a binary pump with two independently controlled piston channels, enabling precise low-dwell-volume gradient formation. Mixing occurs pre-column via high-pressure T-mixer with <10 µL dead volume.
Can the temperature control be disabled for ambient-only operation?
Yes—thermal regulation is fully decoupled from flow control; users may disable heating while retaining all flow performance specifications.
Is the pump compatible with corrosive halogenated solvents such as chlorobenzene or carbon tetrachloride?
Yes—316L stainless steel construction and fluoropolymer-free check valve seats ensure long-term chemical resistance. Extended exposure testing per ASTM D543 confirms no measurable corrosion after 500 h at 80°C.
What maintenance intervals are recommended for routine operation?
Plunger seals require replacement every 6,000 operating hours; check valves every 12 months or 10,000 cycles—whichever occurs first. Full calibration verification is advised quarterly per ISO/IEC 17025 clause 7.7.
Does the pump provide hardware-level flow error correction during pressure transients?
Yes—closed-loop flow compensation uses real-time pressure feedback to dynamically adjust motor torque and dwell time, maintaining setpoint accuracy within ±1.5% during step-pressure changes up to 30 MPa/s.