TDZ4-WS Desktop Low-Speed Centrifuge
| Origin | Hunan, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Product Origin | Domestic (China) |
| Model | TDZ4-WS |
| Price | USD 470 (FOB) |
| Type | Low-Speed Centrifuge |
| Max. Speed | 4000 rpm |
| Max. RCF | 2600 × g |
| Max. Capacity | 4 × 100 mL |
| Dimensions (L×W×H) | 500 × 450 × 280 mm |
| Weight (with rotor) | 20 kg |
| Speed Accuracy | ±30 rpm |
| Timer Range | 0–99 h 59 min / Continuous / Short-Pulse Mode |
| Noise Level | ≤60 dB(A) |
| Power Supply | AC 220 V, 50 Hz |
| Drive System | Brushless Frequency-Controlled Motor |
| Rotor Compatibility | Interchangeable fixed-angle and swing-out rotors (e.g., 4×100 mL, 12×20 mL, 18×10 mL, 24×10 mL, 8×20 mL, 12×15 mL, 4×50 mL) |
| Chamber Material | Stainless Steel (AISI 304) |
| Control Interface | TFT True-Color Touchscreen Display |
| Safety Features | Automatic Rotor Recognition (optional), Lid Lock with Mechanical & Electronic Interlock, Imbalance Detection, Over-Speed Protection, Over-Temperature Protection (for optional cooling models) |
Overview
The TDZ4-WS Desktop Low-Speed Centrifuge is an engineered solution for routine sedimentation and phase separation tasks in life science and industrial laboratories. Designed for operational reliability and ergonomic accessibility, it operates on the principle of centrifugal force generation via rotational acceleration—applying radial acceleration to heterogeneous liquid samples to separate components based on density differentials. With a maximum speed of 4000 rpm and a peak relative centrifugal force (RCF) of 2600 × g, the TDZ4-WS is optimized for applications involving whole blood, cell pellets, crude tissue homogenates, precipitated proteins, and environmental particulates—where high-speed shear or thermal stress must be avoided. Its desktop footprint and robust all-steel chassis ensure stable placement on standard laboratory benches without requiring anchoring or external ventilation. The stainless steel centrifuge chamber complies with ISO 13485-informed corrosion resistance requirements and facilitates rapid decontamination between runs—a critical consideration for biosafety Level 1 and Level 2 workflows.
Key Features
- Brushless frequency-controlled motor delivering quiet operation (<60 dB[A]) and extended service life with minimal maintenance.
- TFT true-color touchscreen interface supporting intuitive parameter entry, real-time run monitoring, and multi-language UI (English, Spanish, French, German).
- Integrated active imbalance detection and automatic deceleration upon load asymmetry exceeding ±5% mass differential across opposing positions.
- Triple-stage mechanical damping system combined with precision-balanced rotor mountings ensures vibration-free operation at full speed—even with partially loaded configurations.
- Electromechanical lid lock with dual-sensor verification prevents accidental opening during rotation and enforces compliance with IEC 61010-2-020 safety standards.
- Modular rotor architecture supporting field-swappable configurations: fixed-angle (e.g., 4×100 mL), swing-out (e.g., 12×20 mL), and microtube adapters—all validated for RCF integrity at rated speeds.
Sample Compatibility & Compliance
The TDZ4-WS accommodates a broad range of sample containers including polypropylene conical tubes (15–100 mL), glass centrifuge bottles, and capped serum vials. It supports protocols aligned with CLSI H18-A3 (clinical centrifugation), ASTM D5127 (environmental sludge dewatering), and USP (pharmaceutical suspension testing). All rotors are certified to ISO 15530-3 for dimensional traceability and undergo 100% dynamic balancing per ISO 1940-1 G2.5 grade. Optional factory-calibrated temperature-controlled variants (not included in base model) meet EN 61000-6-3 EMC emission limits and support GLP-compliant audit trails when paired with optional data logging firmware.
Software & Data Management
While the base TDZ4-WS operates via embedded firmware without PC dependency, optional USB-C data export enables CSV-formatted run logs (start time, set speed, actual RCF, elapsed duration, fault codes) compatible with LIMS integration. Firmware version 2.4+ supports FDA 21 CFR Part 11–compliant electronic signatures when deployed with optional authentication dongles and role-based access control modules. Audit trail records include operator ID, timestamped parameter changes, and session termination events—retained for ≥36 months in non-volatile memory.
Applications
- Clinical diagnostics: Separation of serum/plasma from whole blood (EDTA, heparin, citrate tubes); preparation of PBMCs prior to Ficoll gradient steps.
- Pharmaceutical QC: Clarification of suspensions and emulsions; recovery of insoluble excipients or crystalline APIs post-reactor quench.
- Food microbiology: Pellet isolation of *Listeria*, *Salmonella*, or *E. coli* from enrichment broths prior to plating or PCR extraction.
- Environmental testing: Sedimentation of suspended solids from wastewater influent/effluent per EPA Method 160.1.
- Academic research: Crude organelle fractionation (nuclei, mitochondria) from plant or mammalian homogenates under low-shear conditions.
FAQ
What is the maximum allowable imbalance tolerance for safe operation?
The system halts automatically if mass asymmetry exceeds ±5 g between opposing rotor positions—verified during factory calibration and retestable via built-in diagnostic mode.
Can the TDZ4-WS be used for centrifuging radioactive samples?
Yes—when equipped with optional lead-lined rotor shields and operated inside certified fume hoods; full radiation shielding certification requires third-party validation per ANSI N42.14.
Is rotor lifetime tracked by the instrument firmware?
No—rotor usage cycles are not logged internally; users must maintain external maintenance logs per ISO 13485 Annex A.7.2 recommendations.
Does the device support programmable multi-step protocols?
Not natively; however, external PLC-triggered start/stop signals can be integrated via optional dry-contact I/O port (RS-485 Modbus RTU enabled).
Are CE and RoHS declarations available for export documentation?
Yes—Declaration of Conformity (DoC) and RoHS 2011/65/EU test reports are provided with each unit shipment and accessible via manufacturer’s portal using serial number lookup.
