Maassen MP5MD Compact Automatic Pellet Press (5-Ton Maximum Force)

Overview

The Maassen MP5MD is a compact, fully automatic laboratory pellet press engineered for high-precision, repeatable sample preparation in analytical spectroscopy workflows—specifically optimized for X-ray fluorescence (XRF), wavelength-dispersive XRF (WDXRF), energy-dispersive XRF (EDXRF), and Fourier-transform infrared (FT-IR) spectroscopy. It operates on a dual-stage hydraulic principle: a fast-advance low-pressure stage rapidly positions the platen, followed by a fine-control high-pressure stage delivering calibrated force with mechanical stability and minimal thermal drift. Unlike manually operated presses, the MP5MD integrates closed-loop digital pressure regulation, enabling consistent compaction across batched samples without operator-dependent variability. Its 5-ton (49 kN) maximum force capacity is deliberately tuned for small-diameter dies (≤8 mm), where excessive force risks die fracture or pellet delamination—making it ideal for pressed borate fusion discs, KBr pellets for FT-IR, and low-mass geochemical or environmental powder standards.

Key Features

• Digital pressure control with ±0.01-ton resolution (equivalent to ±10 kgf), ensuring reproducibility critical for quantitative calibration standards.
• Active overpressure limiter prevents mechanical overload—automatically halting pressure application when preset threshold is reached, independent of pump runtime.
• Integrated polycarbonate safety shield with interlocked door switch: press operation is disabled if the shield is open, meeting IEC 61508 functional safety requirements for laboratory equipment.
• Two-stage hydraulic system: rapid initial platen advance (no-load phase) followed by precise force ramping—reducing cycle time while minimizing heat generation in the hydraulic fluid.
• Non-volatile memory retains user-defined pressure setpoints across power cycles, eliminating reconfiguration between sessions.
• One-touch automatic decompression: blue-button actuation initiates controlled pressure release at ≤0.5 MPa/s, returning the platen to home position without manual intervention.
• Corrosion-resistant construction using AISI 304 stainless steel load frame and anodized aerospace-grade aluminum components—ensuring dimensional stability under repeated thermal and mechanical cycling.

Sample Compatibility & Compliance

The MP5MD accepts standard ISO 17025-aligned die sets with internal diameters from 3 mm to 8 mm—including custom Maassen-compatible dies for Li₂B₄O₇ fusion, KBr/NaCl IR pellets, and PTFE-lined stainless-steel dies for trace-metal analysis. Its 150-mm throat width and 70–165 mm net height range accommodate both shallow cavity dies and deep-draw configurations. The system complies with ISO 17025:2017 clause 6.4.10 (equipment suitability for intended use) and supports audit-ready documentation via optional RS-232 or USB data logging (not included). All electrical subsystems meet CE directives (2014/30/EU EMC, 2014/35/EU LVD) and are rated IP20 for laboratory environments. No routine maintenance is required beyond periodic visual inspection of O-rings and die seating surfaces.

Software & Data Management

While the MP5MD operates as a standalone instrument with embedded firmware, its digital interface supports external data capture through TTL-level serial output (RS-232, 9600 baud, ASCII protocol). Timestamped pressure curves—including peak force, dwell time, and decompression rate—can be logged into LIMS or ELN platforms compliant with FDA 21 CFR Part 11 when paired with validated third-party acquisition software. Audit trails record all parameter changes, emergency stops, and door-open events—enabling full traceability for GLP/GMP-regulated labs. Firmware updates are performed via micro-USB without disassembly.

Applications

• Preparation of homogeneous, binder-free pressed pellets for XRF quantification of ores, soils, slags, and ceramics.
• High-transparency KBr pellets for mid-IR spectral acquisition—minimizing scattering artifacts via consistent density control (±0.5% RSD).
• Routine production of fused beads using lithium tetraborate/lithium metaborate fluxes, where precise low-force compaction prevents crucible deformation pre-fusion.
• Reference material homogenization for certified reference material (CRM) producers requiring NIST-traceable density consistency.
• Method development for pharmaceutical tablet excipient studies under non-GMP research conditions.

FAQ

Does the MP5MD support programmable multi-step pressure profiles (e.g., hold-and-ramp)?
No—the MP5MD executes single-stage compression to a user-defined target force, followed by optional dwell (via external timer) and automated decompression. Multi-step profiling requires integration with external PLC or SCADA systems via its digital I/O port.
Is calibration certification included with shipment?
Yes—a factory-issued calibration certificate traceable to DAkkS-accredited standards (force measurement uncertainty ±0.25% of full scale) is provided. Annual recalibration is recommended per ISO/IEC 17025 clause 6.6.
Can the MP5MD be used with corrosive or abrasive powders?
Yes—provided appropriate die materials (e.g., tungsten carbide or hardened stainless steel) are selected and cleaned post-use per ASTM E1138 guidelines. The press itself contains no exposed elastomers in the pressure path.
What is the typical cycle time for a full compression-decompression sequence?
Approximately 22–28 seconds, depending on target force and die geometry. Fastest cycle occurs at ≤3-ton loads with 6-mm dies.
Is remote operation or network connectivity available?
Not natively—the MP5MD lacks Ethernet/Wi-Fi. However, its RS-232 interface enables integration into centralized lab automation systems using Modbus RTU gateways or OPC UA bridges.