PreFluid WL300B Flow-Display Peristaltic Pump

Overview

The PreFluid WL300B Flow-Display Peristaltic Pump is an engineered solution for precise, contamination-free fluid handling in laboratory, pilot-scale, and light industrial applications. Based on the positive-displacement peristaltic principle—where rollers compress flexible tubing against a curved housing to generate unidirectional flow—the WL300B eliminates fluid contact with mechanical components, ensuring sterility, chemical compatibility, and zero risk of cross-contamination. As a direct evolution of the BT-series speed-controlled pumps, the WL300B integrates real-time flow monitoring with dual-mode digital display (RPM or calibrated mL/min), making it suitable for applications requiring traceable, repeatable volumetric delivery under variable load conditions. Its brushless DC motor delivers high torque at low speeds, enabling stable operation across its full 0.1–300.0 rpm range while maintaining low acoustic emission (<45 dB(A)) and thermal drift. The aluminum die-cast chassis—finished with corrosion-resistant electrostatically applied epoxy coating—provides structural rigidity and ease of decontamination, aligning with GLP-compliant lab hygiene standards.

Key Features

• Brushless DC motor with closed-loop speed regulation ensures long-term stability, minimal maintenance, and consistent torque output—even during extended duty cycles.
• Four-digit LED display supports real-time switching between rotational speed (rpm) and calibrated volumetric flow rate (mL/min), with user-selectable tube ID presets for rapid recalibration.
• Tool-free, snap-fit pump head design enables rapid tube installation and replacement; automatic tube-clamp adaptation accommodates wall thickness variations across standard tubing sizes (#13–#36).
• IP54-rated sealed electronics enclosure protects internal circuitry from dust ingress and incidental splashes, supporting deployment in shared lab spaces or controlled manufacturing environments.
• Power-loss memory retains all operational parameters—including speed setpoint, direction, tube ID, and calibration offset—ensuring seamless resumption after unexpected shutdowns.
• Standard RS485 interface compliant with Modbus RTU protocol allows integration into SCADA systems, LIMS, or centralized process controllers; optional 4–20 mA analog input enables analog remote setpoint control.
• Dual-function footswitch support (via optional accessory) facilitates hands-free start/stop/pause in clinical or surgical workflows, such as intraoperative saline irrigation.

Sample Compatibility & Compliance

The WL300B accommodates a broad spectrum of elastomeric tubing materials—including silicone, Pharmed BPT, Viton®, and medical-grade PVC—enabling compatibility with aqueous buffers, organic solvents, acids, bases, and biological suspensions. Each pump head variant (YZ25, DG15, TH16, KZ15, KZ25) is optimized for specific inner diameters and wall thicknesses, delivering verified flow ranges from 0.012 mL/min (low-flow analytical dosing) to 7572 mL/min (high-throughput media transfer). While not certified to ISO 8573 or FDA 21 CFR Part 11 out-of-the-box, the device supports audit-ready operation when deployed with validated tubing, documented calibration procedures, and timestamped parameter logs via external Modbus polling. Its construction meets IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emissions) for electromagnetic compatibility in shared instrumentation racks.

Software & Data Management

The WL300B operates autonomously without proprietary software; however, its Modbus RTU implementation enables bidirectional communication with third-party platforms such as LabVIEW, Python-based control suites (e.g., pymodbus), or industrial HMIs. Users may log runtime data—including actual speed, elapsed time, direction status, and fault codes—via Modbus register mapping (available in the technical manual). For regulated environments, integration with electronic lab notebooks (ELNs) or MES systems can be achieved through middleware that maps Modbus registers to structured JSON or CSV payloads. Calibration coefficients are stored in non-volatile memory and can be exported/imported via serial command sequence, supporting periodic revalidation per ASTM D3418 or internal SOPs.

Applications

• Continuous nutrient or inducer feeding in benchtop bioreactors and microbial fermenters
• Controlled reagent addition in titration systems and automated sample preparation workstations
• Saline or antiseptic irrigation in veterinary and preclinical surgical settings (e.g., wound lavage at 100–600 mL/min with backpressure tolerance up to 0.08 MPa)
• Low-shear transfer of shear-sensitive cell cultures, protein solutions, or colloidal suspensions
• Calibration fluid delivery in analytical instrument autosamplers and HPLC mobile phase lines
• Process validation studies requiring documented flow consistency across multiple shifts or operators

FAQ

Does the WL300B require periodic recalibration?
Yes—flow accuracy depends on tubing elasticity, wear, and compression geometry. We recommend recalibrating after every tubing change and at least once per 200 operating hours using gravimetric or volumetric reference methods per ISO 80000-4.

Can the pump operate continuously at maximum speed?
Yes, provided ambient temperature remains ≤40 °C and ventilation is unobstructed. Continuous operation at ≥250 rpm for >8 hours/day necessitates inspection of tubing fatigue every 48 hours.

Is tubing life tracked automatically?
No—tubing lifetime is application-dependent and must be managed manually. However, the device’s run-time counter (accessible via Modbus register 40023) supports scheduled replacement protocols.

What safety certifications does the unit hold?
The WL300B complies with CE marking requirements (EMC Directive 2014/30/EU and Low Voltage Directive 2014/35/EU). It carries no UL or CSA listing; users deploying in North America should verify local electrical code compliance prior to installation.

How is flow rate calibrated?
Using the built-in calibration routine: select “CAL” mode, enter known tube ID, dispense a measured volume over timed interval, then input observed value. The system computes and stores a new flow coefficient for that tube ID.