HNPM mzr Modular Micro Annular Gear Pump
| Brand | HNPM |
|---|---|
| Origin | Germany |
| Drive Type | Electric |
| Speed Range | 0–300 rpm |
| Flow Rate | 1 µL/h – 1.1 L/h |
| Pressure Range | 0–150 bar |
| Viscosity Range | 0.3–1,000,000 mPa·s |
| Wetted Materials | Alloy C22, 316L SS, PEEK™, Al, ZrO₂ ceramic, Ni-based tungsten carbide |
| Explosion-Proof Options | Available |
| Pulse Amplitude | <±0.5% of set flow |
| Dead Volume | <10 µL (model-dependent) |
| Accuracy | ±0.5% of full scale (typical, under calibrated conditions) |
Overview
The HNPM mzr Modular Micro Annular Gear Pump is an engineered solution for precise, continuous, and pulse-free metering of liquids across an exceptionally broad rheological spectrum — from low-viscosity solvents (0.3 mPa·s) to highly viscous pastes and gels (up to 1×10⁶ mPa·s). Based on the annular gear displacement principle, the pump operates via synchronized rotation of an inner rotor and outer ring gear within a precisely machined housing, generating volumetrically defined displacement per revolution with minimal slippage. This positive displacement architecture ensures high reproducibility and intrinsic linearity between rotational speed and delivered flow — critical for applications demanding trace-level dosing accuracy and long-term stability. Designed and manufactured in Germany, the mzr series complies with DIN EN ISO 9001 quality management standards and integrates seamlessly into analytical, pharmaceutical, and microfluidic platforms where reliability, chemical compatibility, and regulatory traceability are non-negotiable.
Key Features
- Modular wet-end configuration enabling rapid customization of fluid-contact materials: pump housings available in Alloy C22, 316L stainless steel, aluminum, or PEEK™; rotors selectable in zirconia (ZrO₂) ceramic or nickel-tungsten carbide composite for extreme abrasion resistance.
- Ultra-low pulsation (<±0.5% of setpoint) and negligible shear stress — essential for preserving labile biomolecules, emulsions, and particle suspensions during transfer.
- Minimal internal dead volume (<10 µL, depending on model), reducing carryover and enabling efficient solvent flushing between sequential samples.
- Dynamic intelligent drive electronics supporting analog (0–10 V / 4–20 mA) and digital (RS-485, CANopen, optional EtherCAT) interfaces for synchronized integration into automated workflows.
- Explosion-proof variants certified to ATEX Directive 2014/34/EU (II 2G Ex db IIB T4 Gb) for use in Zone 1 hazardous environments involving flammable vapors or dust.
- Extended service life (>20,000 operating hours typical) achieved through hardened ceramic bearings, optimized gear geometry, and lubrication-free operation in compatible media.
Sample Compatibility & Compliance
The mzr pump accommodates diverse liquid classes including aggressive acids (e.g., concentrated HNO₃, HF), organic solvents (THF, DMF), high-pH caustics, and biocompatible buffers without degradation of performance or integrity. Its material selection supports compliance with USP Class VI, FDA 21 CFR Part 11 (when paired with audit-trail-capable controllers), and ISO 13485 for medical device manufacturing. All standard models meet CE marking requirements for electromagnetic compatibility (EMC Directive 2014/30/EU) and low-voltage safety (LVD Directive 2014/35/EU). For GLP/GMP-regulated laboratories, optional firmware enables electronic log generation with timestamped event records (start/stop, speed changes, fault alerts) suitable for audit review.
Software & Data Management
HNPM provides the mzr Control Suite — a Windows-based configuration and monitoring application supporting real-time flow profiling, ramping sequences, multi-step dosing protocols, and batch logging in CSV or SQL-compatible formats. When integrated with third-party SCADA or LIMS systems via Modbus TCP or OPC UA, the pump contributes to fully documented, 21 CFR Part 11-compliant process data acquisition. Firmware updates preserve backward compatibility and include built-in diagnostics for bearing wear estimation, motor temperature trending, and flow deviation alerts — enabling predictive maintenance scheduling without interrupting active assays.
Applications
- Analytical instrumentation: HPLC/UHPLC auxiliary pumps, ICP-MS sample introduction, GC liquid autosamplers
- Life sciences: Reagent dispensing in ELISA, PCR setup, microplate washing, organ-on-chip perfusion
- Pharmaceutical development: Continuous API crystallization, controlled solvent addition in nanoprecipitation, lyophilization cycle support
- Chemical engineering: Catalyst injection in microreactors, stoichiometric feeding in flow hydrogenation
- In vitro diagnostics: Precise buffer delivery in immunoassay analyzers and hematology platforms
- Lab-on-a-chip systems: Integrated fluid actuation for electrophoresis, droplet generation, and cell sorting
- Industrial R&D: Adhesive metering in precision bonding, spray coating calibration, inkjet printhead priming
FAQ
What is the minimum measurable flow rate with guaranteed accuracy?
The mzr series achieves stable, repeatable delivery down to 1 µL/h (0.28 nL/s) when operated at reduced speeds with appropriate tubing and backpressure control; accuracy remains within ±0.5% of full scale under ISO 5725-2 validated conditions.
Can the pump handle particulate-laden fluids?
Yes — with rotor and bearing options in zirconia or tungsten carbide, the mzr tolerates suspended solids up to 50 µm diameter at concentrations ≤0.1% v/v, provided inlet filtration (≥10 µm) is implemented.
Is remote firmware update supported?
Firmware updates are performed via USB or RS-485 using HNPM’s signed update package; no internet connection is required, ensuring cybersecurity compliance in air-gapped laboratory networks.
How is calibration traceability maintained?
Each pump ships with a factory calibration certificate traceable to PTB (Physikalisch-Technische Bundesanstalt); field recalibration kits and accredited service centers are available globally.
What safety certifications apply to the explosion-proof version?
ATEX-certified models comply with Directive 2014/34/EU, carrying II 2G Ex db IIB T4 Gb marking for gas group IIB (e.g., acetone, ethanol) and temperature class T4 (surface temp ≤135°C).
