English Product Name

Overview

The Jihepu DJS-2013R is a stackable, high-capacity incubated shaker engineered for demanding life science applications requiring precise temperature control and reproducible orbital or reciprocal agitation across the full biologically relevant range—from chilling at 4°C to thermophilic incubation at 60°C. Unlike conventional benchtop shakers limited by thermal stability or mechanical resonance, the DJS-2013R employs a patented single-axis balanced drive mechanism that eliminates torque-induced vibration coupling, ensuring uniform motion distribution across the entire 480 × 400 mm stainless-steel platform. Its dual-mode oscillation—switchable between orbital (rotary) and reciprocal (linear) patterns—supports diverse protocols including bacterial suspension homogenization, hybridization kinetics, protein expression induction, and nucleic acid purification workflows. The unit integrates a CFC-free R134a refrigeration system paired with high-wattage resistive heating (800 W), enabling rapid thermal equilibration and sub-0.25°C spatial uniformity within the 550 × 480 × 550 mm insulated chamber. Designed for laboratory scalability, two units may be vertically stacked without structural reinforcement, conserving floor space while maintaining independent operational integrity and safety isolation.

Key Features

• PID-controlled microprocessor with environmental scanning chip ensures real-time adaptive regulation of temperature, speed, and timing—minimizing overshoot and drift under load variations.
• Eight-segment programmable protocol memory allows complex multi-step experiments (e.g., cold-start induction followed by ramped temperature shift and timed harvest), each segment configurable for speed (50–300 rpm, ±1 rpm precision), duration (0–500 h), and setpoint temperature.
• Electromechanical slow-start circuitry prevents sample splashing and tube cap displacement during acceleration, critical for low-volume cultures and fragile reagents.
• Independent dual-safety architecture: Over-speed optical encoder triggers immediate motor cutoff; separate thermistor-based over-temperature circuit cuts heater and compressor power while activating audible/visual alarms.
• Robust construction includes cold-rolled steel frame, stainless-steel mirror-finish interior (AISI 304), anodized aluminum platform support, and electrostatically applied corrosion-resistant polyester coating on exterior panels.
• Front-access door with tempered glass viewport and internal LED illumination enables non-invasive monitoring without thermal or mechanical disturbance.

Sample Compatibility & Compliance

The DJS-2013R accommodates standard microbiological and molecular biology vessels—including 250 mL, 500 mL, and 1000 mL Erlenmeyer flasks (up to 16 × 250 mL or 9 × 1000 mL per run)—secured via optional universal bottle clamps or fixed-position aluminum racks. Its ISO Class 5-compatible chamber design supports GLP-compliant documentation when integrated with external data loggers. While not certified to IEC 61000-4 electromagnetic immunity standards out-of-box, its grounded chassis, filtered AC input, and shielded sensor cabling meet baseline requirements for shared lab environments. The unit complies with GB/T 14710-2009 (Chinese Environmental Testing Standard for Medical Electrical Equipment) and incorporates safeguards aligned with FDA 21 CFR Part 11 principles—such as parameter lockout, audit-trail-ready event logging (via optional RS485 interface), and non-volatile memory retention for power failure recovery.

Software & Data Management

The embedded PID controller features non-volatile memory for all user settings, eliminating reconfiguration after power interruption. Though standalone operation requires no PC, optional serial (RS485) or USB-to-RS232 adapters enable connection to LIMS or custom LabVIEW/Python acquisition scripts. Event logs—including temperature excursions, speed deviations, alarm triggers, and program completion timestamps—are timestamped and storable externally. Firmware supports firmware-upgradable parameter sets, allowing future expansion of humidity or gas-control modules (O₂/CO₂) without hardware replacement. All displayed parameters (current temp, setpoint, rpm, elapsed time) are simultaneously rendered on a dual-line LCD with backlight—designed for readability under ambient lab lighting and glove use.

Applications

This shaker serves core functions in academic research, biopharmaceutical QC, and diagnostic assay development: microbial growth curve analysis under controlled hypothermic stress (4–10°C); recombinant protein expression in E. coli using temperature-inducible promoters (e.g., pLac, pBAD); DNA hybridization optimization for microarray probe labeling; solvent extraction efficiency studies in natural product isolation; and antigen-antibody binding kinetics in ELISA plate pre-incubation. Its wide amplitude (Φ25 mm) and high-speed capability (300 rpm) ensure efficient oxygen transfer in aerobic cultures, while the low-end 50 rpm setting supports gentle resuspension of mammalian cell pellets or tissue explants. The 4°C minimum operating point enables cold-active enzyme assays and RNA stabilization workflows without supplemental ice baths.

FAQ

Can the DJS-2013R operate continuously for extended periods (e.g., >72 h)?

Yes—its timer supports up to 500 hours of uninterrupted operation, and the brushless AC induction motor is rated for continuous duty with thermal overload protection.

Is stacking two units structurally safe without additional support?

Yes—the base chassis and top-load bearing surfaces are reinforced to ISO 14122-3 mechanical load specifications; no anchoring or bracing is required for vertical stacking.

Does the unit support external humidity control?

Not natively, but the optional accessory port allows integration with third-party humidification modules via 0–10 V analog control signals.

What validation documentation is provided for GxP environments?

Factory calibration certificates (temperature uniformity, speed accuracy) are included; IQ/OQ templates compliant with ASTM E2500-13 are available upon request.

How is temperature uniformity verified across the chamber?

Per GB/T 14710, nine-point mapping (center + eight corners at mid-height) confirms ±0.25°C deviation under steady-state conditions at 37°C and 4°C.