BQ80S/BQ-50S Single-Channel Peristaltic Pump – Micro-Flow Precision Drive
| Origin | Shanghai, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (China) |
| Model | BQ80S / BQ-50S |
| Flow Range (BQ80S) | 0.005–32 mL/min |
| Flow Range (BQ50S) | 0.005–20 mL/min |
| Speed Range (BQ80S) | 0.1–80 rpm |
| Speed Range (BQ50S) | 0.1–50 rpm |
| Speed Resolution | 0.1 rpm |
| Flow Accuracy | < ±0.5% |
| Power Supply | AC 220 V ±10%, 50/60 Hz (standard) |
| Power Consumption | <9 W (BQ80S), <8 W (BQ50S) |
| Communication Interface | RS485 with MODBUS RTU protocol |
| Control Inputs | Opto-isolated TTL-compatible digital inputs (5 V / 12 V / 24 V selectable) |
| Enclosure Rating | IP31 |
| Operating Temperature | 0–40 °C |
| Relative Humidity | <80% RH (non-condensing) |
| Dimensions (L×W×H) | 112 × 96 × 96 mm |
| Weight | 0.72 kg (BQ80S), 0.70 kg (BQ50S) |
| Pump Tube | Integrated Pharmed® BPT tubing (FZ10 pump head), rated for 7,500 h (BQ80S) or 12,000 h (BQ50S) continuous operation |
| Housing Material | Flame-retardant ABS with conformal-coated PCBs |
Overview
The BQ80S and BQ50S are single-channel, micro-flow precision peristaltic pumps engineered for stable, low-volume fluid delivery in analytical instrumentation, laboratory automation, and process control systems. Based on the positive displacement principle of peristalsis—where rollers compress a flexible tube against a curved housing to generate unidirectional flow—these pumps deliver high repeatability without fluid contact with mechanical components. Their design prioritizes integration flexibility: compact dimensions (112 × 96 × 96 mm), embedded mounting capability, and desktop-ready form factor support both OEM integration and standalone benchtop use. The core actuation mechanism employs a stepper motor with closed-loop speed regulation, enabling precise rotational control from 0.1 rpm to 80 rpm (BQ80S) or 50 rpm (BQ50S), translating into calibrated flow rates between 0.005 mL/min and 32 mL/min (BQ80S) or 20 mL/min (BQ50S) when paired with the standard FZ10 pump head and Pharmed® BPT tubing (ID 1.0–3.17 mm, wall thickness 0.8–1.0 mm). Flow accuracy is maintained at < ±0.5% across the full operating range under steady-state conditions, validated per ISO 8595:2021 guidelines for peristaltic pump performance testing.
Key Features
- Integrated Pharmed® BPT silicone-free tubing (USP Class VI compliant) with certified longevity: 7,500 hours continuous operation (BQ80S), 12,000 hours (BQ50S), eliminating frequent tube replacement in long-duration assays.
- High-resolution speed control: 0.1 rpm resolution enables fine-grained adjustment for ultra-low-flow applications such as microfluidic sampling, reagent dosing in HPLC autosamplers, or cell culture media perfusion.
- Dual-mode operation: Internal keypad control (membrane buttons) and external logic-level triggering via opto-isolated inputs (5 V / 12 V / 24 V selectable), supporting footswitch activation, timer-based dispensing, or PLC-synchronized start/stop/reverse commands.
- Industrial-grade communication: RS485 interface compliant with MODBUS RTU protocol (function codes 03h, 06h, 10h), enabling seamless integration with SCADA systems, LabVIEW, Python-based controllers, or Allen-Bradley CompactLogix PLCs.
- Robust electrical architecture: Conformal-coated PCBs provide dust and moisture resistance (IP31-rated enclosure); wide-input voltage tolerance (±10% AC line variation) ensures stable operation in non-regulated lab power environments.
- Persistent state memory: Power-loss recovery retains last-used speed, direction, and mode settings—critical for GLP-compliant workflows requiring audit-trail continuity.
Sample Compatibility & Compliance
The BQ80S/BQ50S accommodates standard FZ10 single-roller pump heads with interchangeable Pharmed® BPT tubing (inner diameter 1.0–3.17 mm, wall thickness 0.8–1.0 mm), ensuring compatibility with aqueous buffers, organic solvents (e.g., acetonitrile, methanol), and mild acids/bases commonly used in analytical chemistry and bioprocessing. Tubing selection adheres to USP particulate matter limits and ISO 10993-5 cytotoxicity standards. While not intrinsically rated for hazardous locations, the pump meets IEC 61000-4 electromagnetic immunity requirements (ESD, EFT, surge) and complies with CE marking directives (2014/30/EU EMC, 2014/35/EU LVD). For regulated environments, its MODBUS register map supports configurable data logging intervals and event-triggered status flags—enabling alignment with FDA 21 CFR Part 11 electronic record controls when deployed within validated software ecosystems.
Software & Data Management
No proprietary software is required; native MODBUS RTU implementation allows direct register-level access to operational parameters—including real-time speed (40001), direction flag (40002), run status (40003), and error code (40004)—via industry-standard Modbus masters. Users may configure custom polling intervals (100 ms minimum) and implement timestamped data capture using open-source tools (e.g., QModMaster, pymodbus) or commercial platforms (Ignition SCADA, MATLAB Instrument Control Toolbox). All configuration changes are stored in non-volatile memory. Audit-ready operation is supported through external logging of MODBUS transaction timestamps and value deltas—facilitating traceability for ISO/IEC 17025 calibration records or internal QA documentation.
Applications
- Automated sample introduction in ion chromatography (IC) and capillary electrophoresis (CE) systems requiring sub-mL/min flow stability.
- Continuous reagent addition in photometric enzyme assays and colorimetric immunoassays where pulseless flow minimizes baseline drift.
- OEM integration into environmental monitoring analyzers (e.g., nutrient sensors, pH/ORP controllers) for calibration solution delivery.
- Cell-based assay platforms requiring precise perfusion rates (e.g., 0.01–0.5 mL/min) in microphysiological systems (MPS) and organ-on-chip devices.
- Calibration fluid transfer in metrology labs performing volumetric verification of pipettes and burettes per ISO 8655.
FAQ
What tubing types are compatible with the FZ10 pump head?
Pharmed® BPT tubing (ID 1.0–3.17 mm, wall thickness 0.8–1.0 mm) is factory-installed and validated. Alternative USP Class VI tubing (e.g., C-Flex®, Norprene®) may be used if dimensional tolerances match the FZ10 roller geometry.
Does the pump support bidirectional flow with equal accuracy in both directions?
Yes—mechanical symmetry of the FZ10 head and stepper motor control ensure equivalent flow rate repeatability (< ±0.5%) during forward and reverse rotation.
Can the BQ80S/BQ50S be integrated into a GMP-regulated manufacturing line?
It can serve as a component within a validated system; however, final GMP compliance depends on the host system’s qualification protocol, including IQ/OQ/PQ documentation and MODBUS data integrity validation per Annex 11.
Is firmware upgradable in the field?
Firmware updates require a dedicated USB-to-RS485 adapter and vendor-provided binary files; no over-the-air (OTA) capability is included.
What is the maximum allowable backpressure for stable operation?
Rated for continuous operation up to 0.2 bar (20 kPa) static backpressure; higher pressures require dynamic characterization with specific tubing and fluid viscosity.
