Qiangle DHZ-L Refrigerated Orbital Shaker

Overview

The Qiangle DHZ-L Refrigerated Orbital Shaker is an engineered platform for precise, temperature-controlled orbital agitation of biological and chemical samples in research laboratories, bioprocessing facilities, and quality control environments. Designed around a robust refrigerated chamber and high-stability motor-driven orbital drive system, it delivers consistent, low-vibration motion across a broad operational envelope—enabling reliable cultivation of microbial cultures, suspension cell lines, enzyme assays, and solubility studies under controlled thermal conditions. Its core operating principle relies on a brushless DC motor coupled to a precision-machined eccentric drive mechanism, generating uniform circular motion (orbital diameter: standard 25 mm) with minimal harmonic distortion. Unlike reciprocating or rocking shakers, the DHZ-L’s orbital motion promotes homogeneous mixing and optimal gas exchange in liquid media without inducing excessive shear stress—critical for aerobic microbial growth and sensitive protein-based applications.

Key Features

• Refrigerated temperature control from 5°C to 60°C, with digital PID regulation and real-time display (activated when ambient lab temperature remains below 30°C)
• Continuously adjustable orbital speed from 40 to 280 rpm, digitally monitored and automatically stabilized during operation
• Single large-format stainless-steel platform (1300 × 650 mm) supporting up to six 5 L Erlenmeyer flasks or customizable multi-vessel configurations
• Low-noise design (<50 dB(A) at 1 m front position), compliant with ISO 7779 and IEC 60704-1 acoustic emission standards for laboratory equipment
• Integrated safety architecture including over-temperature cutoff, motor overload protection, and door-open interlock
• Energy-efficient 500 W refrigeration-compressor system optimized for continuous 24/7 operation in ambient temperatures up to 30°C

Sample Compatibility & Compliance

The DHZ-L accommodates standard microbiological and biochemical vessels—including glass and polycarbonate Erlenmeyer flasks (50 mL to 5000 mL), baffled culture bottles, and multi-well plates mounted on auxiliary platforms. Its uniform orbital motion ensures reproducible oxygen transfer rates (k_La) across vessel sizes, supporting protocols aligned with ASTM D5540 (standard practice for determining oxygen transfer rates in shaken cultures) and ISO 21502 (biotechnology—general requirements for shaker incubators). The unit meets CE marking requirements under the EU Machinery Directive 2006/42/EC and Electromagnetic Compatibility Directive 2014/30/EU. While not pre-certified for GMP or FDA 21 CFR Part 11 compliance, its stable analog control architecture and absence of embedded software allow integration into validated workflows where electronic record integrity is managed externally via LIMS or ELN systems.

Software & Data Management

The DHZ-L operates via an embedded microcontroller with digital LED interface—no onboard data logging, USB connectivity, or PC software is included. All operational parameters (set temperature, actual chamber temperature, and rpm) are displayed in real time. For laboratories requiring audit-trail capability, external data acquisition systems (e.g., LabVIEW-compatible thermocouple/rpm sensors or standalone chart recorders) may be interfaced using standard 0–5 V analog outputs (available upon request with optional I/O module). This design prioritizes reliability, serviceability, and regulatory flexibility—particularly suited for GLP environments where deterministic hardware behavior is preferred over firmware-dependent functionality.

Applications

• Microbial fermentation and biomass propagation (E. coli, yeast, Bacillus spp.) under defined temperature-aeration profiles
• Suspension culture of mammalian and insect cells in serum-containing or serum-free media
• Enzyme kinetics and protein stability assays requiring simultaneous thermal and mechanical control
• Solubility screening and dissolution testing of pharmaceutical compounds per USP
• Environmental microbiology: enrichment cultures for water and soil isolates at sub-ambient temperatures (e.g., 10–15°C)
• Preparative biochemistry: gentle mixing of affinity columns, dialysis buffers, and immunoprecipitation reactions

FAQ

Does the DHZ-L support programmable ramping or multi-step temperature/speed profiles?
No—the DHZ-L provides fixed-setpoint operation only. Temperature and speed must be manually adjusted and held constant throughout a run.
Is the refrigeration system capable of maintaining 5°C in a 32°C ambient environment?
Performance is rated for ambient conditions ≤30°C. At higher ambient temperatures, cooling capacity diminishes; sustained 5°C operation cannot be guaranteed above 30°C ambient.
Can the shaker accommodate stacked platforms or auxiliary clamping fixtures?
The unit is configured for a single rigid platform. Custom mounting brackets or secondary trays may be installed—but structural integrity and vibration isolation must be independently verified per ISO 10816-3.
What maintenance intervals are recommended for long-term reliability?
Compressor oil inspection every 24 months; drive belt tension check annually; condenser coil cleaning quarterly in dusty environments.
Is calibration documentation provided with shipment?
A factory-issued performance verification report (covering temperature uniformity ±1.5°C across platform, speed accuracy ±2 rpm) is included. NIST-traceable calibration certificates are available as a value-added service.