HNPM mzr-6355 Micro Precision Gear Pump
| Brand | HNPM |
|---|---|
| Origin | Germany |
| Model | mzr-6355 |
| Drive Type | Electric DC Servo Motor (24 V DC, 44 W) |
| Speed Range | 1–6000 rpm |
| Flow Rate | 1 μL/h – 1.1 L/h (0.024–144 mL/min) |
| Pressure Rating | Up to 80 bar (1160 psi) |
| Precision | CV < 1% |
| Viscosity Range | 0.3–1000 mPa·s |
| Displacement Volume | 24 μL/rev |
| Minimum Dose | 15 μL |
| Wetted Materials | Alloy C22 (2.4602), SSiC, Al₂O₃, ZrO₂, FFKM (Kalrez® 6375) |
| Fluid Connections | 1/8" NPT internal thread |
| Dimensions (L×W×H) | 146 × 70 × 72 mm |
| Weight | ~1650 g |
| Operating Temperature | −5 to +60 °C (−20 to +150 °C with optional thermal module) |
| Torque Transmission | 8-pole NdFeB magnetic coupling |
| Interface Options | 0–10 V analog, 0(4)–20 mA, RS-232, 1 digital I/O, optional CAN bus |
Overview
The HNPM mzr-6355 is a high-precision micro gear pump engineered for continuous, pulseless, and bidirectional metering of low-to-medium viscosity liquids in demanding laboratory, analytical, and process automation environments. Based on the micro annular gear principle — featuring an inner rotor with six or ten external teeth meshing with an outer rotor having seven or eleven internal teeth — it operates as a positive displacement rotary pump without valves, check elements, or pulsation-generating mechanisms. This architecture ensures stable pressure delivery, exceptional volumetric accuracy, and long-term repeatability. Designed and manufactured in Germany, the mzr-6355 integrates ceramic functional components (ZrO₂ rotors, Al₂O₃ bearings, SSiC shafts) and corrosion-resistant wetted materials including Hastelloy® C22 (2.4602) and FFKM elastomers (Kalrez® 6375), enabling reliable operation across aggressive chemical media — from concentrated acids and caustics to oxidizing and reducing agents. Its compact footprint (146 × 70 × 72 mm) and standardized electrical and fluid interfaces make it suitable for OEM integration into robotic liquid handling platforms, flow chemistry reactors, HPLC auxiliary dosing systems, and GLP-compliant analytical instrumentation.
Key Features
- Valveless rotary positive displacement design eliminates pulsation and backflow, ensuring smooth, laminar flow profiles critical for sensitive detection and reaction control.
- Ceramic-based core components (ZrO₂ rotors, Al₂O₃ bearing surfaces, SSiC shafts) deliver exceptional wear resistance and dimensional stability over extended service life — even under abrasive or high-shear conditions.
- Chemically inert wetted path using Alloy C22 (2.4602), optionally configurable with 316L stainless steel, guarantees compatibility with >95% of common laboratory solvents, reagents, and process fluids per ASTM G152 and ISO 21809-3 material compatibility guidelines.
- High-resolution flow control via digitally regulated DC servo motor (24 V DC, 44 W), supporting speed modulation from 1 to 6000 rpm — corresponding to a calibrated flow range of 1 μL/h to 1.1 L/h with CV < 1% at steady-state operation.
- Magnetic torque transmission (8-pole NdFeB coupling) isolates drive electronics from process fluid, eliminating seal leakage paths and enabling maintenance-free operation under differential pressures up to 40 bar (for η > 16 mPa·s) and system pressures up to 80 bar.
- Multi-protocol interface support (0–10 V analog, 0/4–20 mA, RS-232, digital I/O) facilitates seamless integration into LabVIEW, PLC, or SCADA-controlled environments; CAN bus option available for distributed industrial networks.
Sample Compatibility & Compliance
The mzr-6355 is validated for use with aqueous, organic, and halogenated media across pH 0–14 and redox potentials ranging from −1200 mV to +1200 mV. Its material set conforms to USP Class VI biocompatibility requirements and meets EN 10204 3.1 material certification standards for metallic components. All elastomeric seals comply with FDA 21 CFR §177.2600 for repeated food-contact applications and exhibit full resistance to ozone, UV exposure, and hydrolysis per ISO 188 and ASTM D573. The pump supports audit-ready operation under GLP and GMP frameworks when paired with compliant data acquisition software, offering timestamped event logging, parameter change tracking, and electronic signature capability aligned with FDA 21 CFR Part 11 Annex 11 principles.
Software & Data Management
HNPM provides firmware-upgradable controller firmware with embedded real-time flow calibration tables traceable to PTB (Physikalisch-Technische Bundesanstalt) reference standards. Optional PC software enables remote configuration of ramp profiles, dose sequencing, error thresholding, and alarm triggering. All operational parameters — including cumulative volume dispensed, motor current draw, temperature status, and fault codes — are accessible via ASCII command protocol over RS-232 or analog output channels. Data export supports CSV and XML formats compatible with LIMS (e.g., LabWare, Thermo Fisher SampleManager) and ELN platforms. Firmware logs retain ≥30 days of operational history with write-protected memory, satisfying ALCOA+ data integrity criteria for regulated laboratories.
Applications
- Precise reagent dosing in automated titration and potentiometric analysis systems.
- Continuous feed control in microreactor and flow synthesis modules requiring sub-microliter reproducibility.
- Calibration fluid delivery in gravimetric and volumetric standardization workflows per ISO/IEC 17025.
- Mobile phase supplementation in UHPLC and SFC systems where low-dead-volume, pulse-free flow is essential.
- In-line dilution and spiking in environmental water testing (EPA Methods 500–600 series) and pharmaceutical impurity profiling (ICH Q2(R2)).
- OEM integration into point-of-care diagnostic instruments requiring chemically resistant, miniaturized fluidic actuation.
FAQ
What is the minimum controllable dose per dispensing cycle?
The mzr-6355 achieves a minimum discrete dose of 15 µL, enabled by its 24 µL/rev displacement volume and sub-micron rotor tooth tolerance (< 3 µm).
Can the pump handle viscous silicone oils or glycerol-water mixtures?
Yes — it operates reliably across viscosities from 0.3 to 1000 mPa·s. For fluids >16 mPa·s, maximum differential pressure is rated at 40 bar; for lower-viscosity media, system pressure may reach 80 bar.
Is the pump suitable for sterile or aseptic applications?
While not autoclavable, the mzr-6355’s fully drainable, crevice-free fluid path and C22/Al₂O₃/FFKM construction support SIP (steam-in-place) protocols at ≤121°C for ≤30 min when equipped with optional thermal management module.
How is flow accuracy verified and maintained over time?
Each unit undergoes factory calibration against NIST-traceable gravimetric standards. Users may perform field verification using certified flow meters (e.g., Bronkhorst CORI-FLOW) or timed gravimetric checks; recalibration intervals are recommended every 12 months or after 5000 operating hours.
Does HNPM provide documentation for regulatory submissions?
Yes — comprehensive DQ/IQ/OQ documentation packages, material compliance certificates (EN 10204 3.1), and EU Declaration of Conformity (CE + RoHS + REACH) are supplied with each unit upon request.
