Chuding BQ50S/BQ80S Micro-Flow Adjustable-Speed Peristaltic Pump with FZ10 Pump Head

Overview

The Chuding BQ50S and BQ80S are compact, micro-flow adjustable-speed peristaltic pumps engineered for precision fluid handling in analytical instrumentation, laboratory automation, and process monitoring systems. Based on the principle of positive displacement via roller compression of elastomeric tubing, these pumps deliver repeatable, pulse-free flow without internal valves or seals—eliminating cross-contamination and enabling compatibility with aggressive solvents, biological buffers, and particulate-laden media. The BQ50S achieves flow rates from 0.005 to 20 mL/min at speeds of 0.1–50 rpm, while the BQ80S extends the upper limit to 32 mL/min at 0.1–80 rpm, making both models suitable for low-volume reagent delivery, calibration standard dosing, continuous sampling, and closed-loop feedback control in OEM instrument integration. Their embedded form factor (112 × 96 × 96 mm), lightweight construction (<0.72 kg), and dual-mode operation (standalone benchtop or panel-mounted) support flexible deployment across modular lab platforms and compact analytical devices.

Key Features

• High-resolution speed control with 0.1 rpm step resolution ensures fine-grained adjustment for ultra-low-flow applications such as microfluidic priming or trace-standard dilution.
• Integrated Pharmed® BPT tubing (ID 1.0–3.17 mm, wall thickness 0.8–1.0 mm) provides excellent chemical resistance to acids, bases, alcohols, and organic solvents, with validated lifetime ratings of 12,000 hours (BQ50S) and 7,500 hours (BQ80S) under continuous operation at nominal load.
• Opto-isolated digital control inputs support TTL/CMOS logic levels (5 V / 12 V / 24 V selectable), enabling reliable interfacing with PLCs, industrial HMIs, and custom timing modules—including footswitch-triggered dispensing and time-based fraction collection.
• RS485 serial interface compliant with MODBUS RTU protocol allows bidirectional communication for remote start/stop, direction reversal, speed setpoint updates, and real-time status polling—facilitating integration into SCADA, LIMS, and automated QA/QC workflows.
• Conformal-coated PCBs enhance long-term reliability in humid or dusty environments (IP31 rating), while wide-input voltage tolerance (±10% AC supply) and EMI-hardened circuitry ensure stable operation in electrically noisy laboratories or field-deployed equipment racks.
• Non-volatile memory retains last-used parameters—including speed, direction, and operating mode—after power loss, supporting uninterrupted operation in regulated environments requiring audit-ready configuration persistence.

Sample Compatibility & Compliance

These pumps are compatible with a broad range of aqueous, organic, and mildly corrosive fluids when used with Pharmed® BPT tubing. They meet general-purpose laboratory safety and electromagnetic compatibility requirements per IEC 61326-1 (industrial EMC) and IEC 61010-1 (electrical safety). While not certified for medical device use or explosion-proof environments, their design supports GLP-compliant documentation practices through MODBUS-accessible operational logs and deterministic flow behavior. Tube selection adheres to ISO 8536-4 (infusion sets) dimensional guidelines, and flow accuracy (< ±0.5%) is verified per ASTM D3418 for rotational viscometry reference standards.

Software & Data Management

No proprietary software is required; MODBUS RTU commands are implemented over standard RS485 physical layer using function codes 03h (read holding registers), 06h (write single register), and 10h (write multiple registers). Register maps include speed setpoint (0x0001), direction control (0x0002), run/stop state (0x0003), and fault status (0x0004). Integration with LabVIEW, Python (pymodbus), or MATLAB is straightforward via USB-to-RS485 adapters. Audit trails can be generated by logging register writes and responses, satisfying basic FDA 21 CFR Part 11 data integrity expectations when paired with timestamped external logging.

Applications

• Automated liquid handling in HPLC autosamplers and IC eluent delivery systems
• Low-flow calibration of gas analyzers and dissolved oxygen sensors
• Continuous infusion in cell culture bioreactors and microphysiological systems
• Reagent metering in clinical chemistry analyzers and immunoassay platforms
• Environmental water quality monitoring—e.g., sequential extraction of heavy metals from soil leachates
• OEM integration into portable spectrophotometers and electrochemical test stations

FAQ

What tubing types are supported?
Pharmed® BPT tubing with inner diameters of 1.0–3.17 mm and wall thicknesses of 0.8–1.0 mm is factory-installed and validated. Other tubing materials (e.g., Viton®, Tygon® E-3603) may be used but require recalibration and lifetime validation.
Can the pump operate in continuous duty cycle?
Yes—both models are rated for continuous operation within specified ambient conditions (0–40 °C, <80% RH) and achieve rated tube lifetimes only when operated within recommended speed and pressure limits.
Is MODBUS register documentation available?
Yes—a complete register map, including address offsets, data types, and scaling factors, is provided in the technical manual upon request.
Does the pump support analog input for speed control?
No—speed is controlled exclusively via digital inputs (TTL/CMOS) or MODBUS commands. Analog voltage or current inputs are not supported.
How is flow rate calibrated?
Flow is calibrated empirically using gravimetric measurement against NIST-traceable balances. Calibration coefficients are stored in non-volatile memory and applied automatically during operation.