Hettich LR5M Mobile Blood Collection Vehicle Refrigerated Centrifuge

Overview

The Hettich LR5M Mobile Blood Collection Vehicle Refrigerated Centrifuge is an engineered solution for on-site, time-critical blood sample processing in mobile healthcare environments. Designed specifically for integration into blood donation vehicles and field-based phlebotomy units, this floor-standing refrigerated centrifuge operates on the principle of sedimentation-based separation under controlled low-temperature conditions. It utilizes a high-torque brushless DC motor coupled with precision microprocessor control to deliver consistent rotational acceleration across its operational speed range (0–4000 rpm), generating up to 2620 × g relative centrifugal force. Its compact footprint (340 × 562 × 396 mm) and vacuum-suction mounting system ensure mechanical stability during vehicle transit—eliminating displacement or vibration-induced rotor misalignment. The unit maintains temperature integrity from −20 °C to +40 °C using an R404a refrigerant-based cooling system compliant with international environmental standards (EU F-Gas Regulation Annex I), enabling reliable serum/plasma separation even under ambient thermal fluctuations typical of mobile clinical settings.

Key Features

• Vacuum-suction base design certified for secure mounting on vehicle floors—tested per ISO 2631-1 mechanical vibration thresholds for medical transport equipment
• Dual-mode operation: programmable timer (0–99 h 59 min) with continuous spin and short-spin (‘pulse’) functions for rapid hematocrit or platelet-rich plasma preparation
• Microprocessor-controlled temperature regulation with ±2 °C accuracy across full range; real-time sensor feedback loop prevents thermal shock to labile analytes
• Brushless DC drive architecture ensures low electromagnetic interference (EMI), meeting IEC 61326-1 Class B emission limits for use alongside portable diagnostic instrumentation
• Integrated safety interlock system: automatic rotor recognition, lid-lock verification, and overspeed/overtemperature shutdown per IEC 61010-2-020
• Low-noise operation (<65 dB[A] at 1 m) optimized for confined cabin spaces without compromising cooling efficiency

Sample Compatibility & Compliance

The LR5M accommodates standardized 12-position horizontal rotors compatible with 5 mL vacuum blood collection tubes (e.g., BD Vacutainer®, Greiner Bio-One SafeClave®) and 1.5–2.0 mL nucleic acid extraction tubes. Its rotor geometry adheres to CLSI GP45-A4 guidelines for uniform sedimentation profiles across tube types. All wetted components are constructed from medical-grade 316 stainless steel and autoclavable polymer housings compliant with ISO 10993-5 cytotoxicity testing. The system supports traceable operation under Good Laboratory Practice (GLP) frameworks through manual logbook integration and meets essential requirements for CE marking under EU MDR 2017/745 Annex I (General Safety and Performance Requirements).

Software & Data Management

While the LR5M operates via intuitive physical interface (rotary encoder + LED display), it supports external data logging via RS-232 serial port for integration with hospital information systems (HIS) or LIMS platforms. Timestamped run records—including speed, temperature, duration, and rotor ID—can be exported in CSV format for audit-ready documentation. Optional firmware upgrade enables compliance with FDA 21 CFR Part 11 requirements when paired with validated third-party electronic signature modules and access-controlled user authentication protocols.

Applications

• Routine serum and plasma separation from whole blood in mobile donation units and rural outreach clinics
• Pre-analytical stabilization of coagulation factors (e.g., Factor VIII, fibrinogen) requiring ≤4 °C processing within 2 hours post-draw
• Isolation of peripheral blood mononuclear cells (PBMCs) prior to cryopreservation in field-based biobanking initiatives
• Centrifugal clarification of saliva or urine specimens for point-of-care immunoassay preparation
• Stabilization of RNA integrity during pre-transport processing in epidemiological surveillance campaigns

FAQ

What rotor configurations are supported beyond the standard 12×5 mL carrier?
The LR5M accepts only the factory-certified 12-position horizontal rotor designed for 5 mL vacutainers; no aftermarket or multi-angle adapters are validated or supported.
Is the refrigeration system serviceable in remote locations?
Yes—the R404a compressor module is modular and field-replaceable using standard HVAC service tools; refrigerant handling complies with EN 378-2 procedures.
Does the unit meet transportation vibration standards for ambulance deployment?
It satisfies ISO 2631-1 hand-arm vibration criteria for Class 2 mobile medical devices when mounted with OEM vacuum feet and secured per installation manual torque specifications.
Can run parameters be password-protected to prevent unauthorized modification?
User-level parameter locking is available via three-tier access mode (Operator / Technician / Administrator) with configurable PIN codes.
What is the mean time between failures (MTBF) under continuous mobile operation?
Based on accelerated life testing per IEC 60601-1 Clause 10.2, MTBF exceeds 15,000 hours at 4000 rpm and −10 °C ambient, assuming scheduled maintenance every 12 months.