HL-4D Single-Channel Digital Peristaltic Pump with Timer Function

Overview

The HL-4D Single-Channel Digital Peristaltic Pump with Timer Function is a precision-engineered laboratory peristaltic pump designed for continuous, pulse-free fluid delivery in research, analytical, and process validation environments. Operating on the fundamental principle of peristalsis—where rollers compress flexible tubing to generate positive displacement—the HL-4D delivers highly reproducible flow rates without fluid contact with moving parts, eliminating contamination risk and enabling safe handling of aggressive, viscous, or particulate-laden solutions. Its robust mechanical architecture integrates a high-torque DC motor with a precision-machined roller assembly and calibrated gear train, ensuring stable performance across its full 60–18,000 mL/h flow range. The pump is engineered for long-term stability under variable back pressure conditions (≥0.2 MPa), making it suitable for applications requiring consistent volumetric delivery against moderate resistance, such as column elution, dialysis feed, bioreactor perfusion, and environmental sample extraction.

Key Features

• Digital speed display with real-time rpm readout (0–155 rpm), enabling precise calibration and method transfer between instruments
• Stepless mechanical speed control via front-panel knob—no software dependency, ensuring operational reliability in regulated or offline lab settings
• Integrated timer and stop-delay functions (1 second to 99 minutes 59 seconds), supporting unattended operation for standardized protocols
• Modular design: pump head (120 × 120 × 180 mm) and controller (260 × 250 × 120 mm) are physically separated, facilitating installation in confined spaces or integration into custom rigs and OEM systems
• Chemically resistant pump housing and roller assembly compatible with standard silicone, Viton®, and Tygon® tubing (ID 1.6–6.4 mm recommended)
• No internal valves or seals—minimal maintenance and no risk of cross-contamination between runs

Sample Compatibility & Compliance

The HL-4D accommodates a broad spectrum of liquid samples—including aqueous buffers, organic solvents (with appropriate tubing selection), cell culture media, wastewater extracts, and low-viscosity suspensions—without degradation of flow accuracy. Its peristaltic mechanism inherently prevents sample shear damage, preserving integrity of sensitive biologicals (e.g., enzymes, exosomes, or live cells). While not certified to IEC 61000-6-3 or UL 61010-1 out-of-box, the device complies with general safety requirements for Class I laboratory equipment when operated within ambient temperature (10–40 °C) and relative humidity (<80% RH, non-condensing) limits. Users deploying the HL-4D in GLP or GMP-aligned workflows may configure SOPs referencing ASTM D3231 (for pump calibration verification) and ISO 8573-1 (for compressed air–free operation where applicable). Tube replacement intervals should be documented per internal quality procedures to maintain flow consistency.

Software & Data Management

The HL-4D operates as a standalone hardware instrument with no embedded firmware, network interface, or proprietary software dependency. All parameter settings—including speed, timer duration, and stop delay—are configured directly via tactile controls and verified by LED-based digital display. This architecture eliminates cybersecurity vulnerabilities, ensures deterministic response time (<100 ms actuation latency), and supports audit-ready manual log entries. For laboratories requiring electronic records, external data acquisition systems (e.g., LabVIEW™, Python-based DAQ scripts, or PLC-controlled HMI panels) may interface with the pump’s dry-contact start/stop terminals (optional accessory). No 21 CFR Part 11 compliance features are built-in; however, the device supports ALCOA+ principles when used within a validated procedural framework—particularly through traceable tube lot documentation, scheduled calibration checks, and timestamped operator logs.

Applications

• Environmental monitoring: Continuous sampling of surface water or effluent streams with programmable duty cycles
• Clinical diagnostics: Reagent delivery in automated immunoassay platforms and hematology analyzers
• Academic research: Gradient formation in chromatography training modules and pH titration setups
• Pharmaceutical QC: Controlled addition of dissolution media or titrants in USP and testing apparatus
• Biotechnology: Perfusion feeding in small-scale mammalian cell cultures and microfluidic chip priming
• Water treatment R&D: Dosing of coagulants, flocculants, or disinfectants in pilot-scale reactors

FAQ

What tubing sizes are compatible with the HL-4D pump head?
Standard peristaltic tubing with inner diameters from 1.6 mm to 6.4 mm is supported; optimal flow linearity is achieved using silicone or fluoropolymer-lined tubing rated for continuous compression at ≤155 rpm.
Does the HL-4D support remote start/stop via external signal?
Yes—dry-contact input terminals (included) accept TTL-level or 24 VDC trigger signals for integration into automated test benches or SCADA systems.
Is calibration certificate included with purchase?
No factory calibration certificate is supplied; users are advised to perform initial flow verification using gravimetric or volumetric methods per ISO/IEC 17025 guidelines prior to first use.
Can the HL-4D operate continuously for extended periods (e.g., >8 hours)?
Yes—designed for uninterrupted operation up to 72 hours under nominal load and ambient cooling; periodic tubing inspection every 8–12 hours is recommended to prevent fatigue-induced flow drift.
What is the expected service life of the pump tubing under typical lab conditions?
With proper tension adjustment and operation at ≤100 rpm, silicone tubing typically lasts 100–200 hours; fluoropolymer alternatives extend service life to 500+ hours depending on chemical exposure and pressure profile.