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Hermle Z446K Refrigerated Centrifuge
Maximum Speed
16,000 RPM (4,500 RPM with included rotor)
Maximum Capacity
4 x 750ml (4 x 500ml with included rotor)
Temperature Range
-20°C to 40°C
- Advanced microprocessor controls with automatic rotor identification
- Quick one-minute rotor exchange with seamless recognition
- Customizable acceleration and deceleration settings for precision
- Stores up to 99 programs for quick and easy recall
- Intuitive LCD display for real-time monitoring and adjustments
- Quiet operation minimizes lab disruptions
- Durable aircraft-grade alloy construction for long-lasting performance
- Multiple run modes including timed, continuous, and pulse settings
The Hermle Z446K Refrigerated Centrifuge series offers the highest capacity of any benchtop Hermle centrifuge model. With air-craft grade, premium alloy construction, the 4 x 500ml Swing Bucket Rotor can withstand centrifugal forces upwards of 4,211 x g. Advanced microprocessor controls allow for instant rotor identification, which automatically converts the rotational speed to the relevant g-force (RCF), preventing the user from setting a speed above the capabilities of the installed rotor. In addition to retrieving saved programs, the easy-to-use front panel can adjust acceleration and deceleration rates and change the end of run alarm tone. Rotor exchange is simple and requires less than one minute. As soon as the rotor is placed on the motor shaft, the identification process activates and the installed rotor code is displayed on the backlit LCD display.
The included 221.08 V04 Swing Bucket Rotor reaches a maximum speed of 4,500 RPM and a maximum RCF of 4,211 x g.All of our equipment is in excellent condition and will be fully tested to perform at factory specifications before being shipped.
Please confirm this rotor meets your application needs and request a different rotor, if necessary. Available rotors can be found in our Rotor Compatibility Guide.
The Hermle Z446K Refrigerated Centrifuge includes:
- > 221.08 V04 Swing Bucket Rotor and Buckets
- > Set of 12 x 15ml Adapters
- > Set of 5 x 50ml Adapters
- > NIST Centrifuge Calibration and Preventative Maintenance Report
- > Power Cord
- > Full 180 Day Parts and Labor Warranty
Hermle Z446K Refrigerated Centrifuge Specifications
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Maximum Speed
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16,000 RPM (4,500 RPM with included rotor)
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Maximum RCF
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26,331 x g (4,211 x g with included rotor)
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Maximum Capacity
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4 x 750ml (4 x 500ml with included rotor)
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Temperature Range
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-20°C to 40°C
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Timer
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Up to 99 hours 59 minutes, with continuous run (hold) and pulse modes
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Acceleration Rates
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9
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Deceleration Rates
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9
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Number of Compatible Rotors
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15
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Display
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LCD
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Program Storage
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Up to 99 programs
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Noise Level
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< 65 dB(A)
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Dimensions (W x D x H)
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28.7 x 26.4 x 15.4 in. (73 x 67 x 39 cm)
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Weight
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244.7 lb. (111 kg)
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Electrical Requirements
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120V, 50/60Hz, 15A, 1550W
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- Door Latch Assembly Checked for Full Function
- Door Hinges are Checked and Lubed as Needed
- Drive Belt is Checked for Rips and Tears and Replaced if Needed
- Rotors and O-rings are Lubed as Needed
- Lamps and Display are Checked and Replaced if Dim
- Line Cord is Checked for Signs of Fray or Damage and Replaced Accordingly
- Internal Circuitry is Checked for Faulty/Shorted Components and Replaced Accordingly
- Confirm the power supply output voltages match specified requirements for stable distribution to all internal components
- Measure and verify voltages at PCB test points to ensure accurate power delivery and circuit integrity
- Confirm rotor compatibility with the centrifuge model and check that rotor detection systems recognize the rotor type
- Inspect the exterior for any cosmetic or structural damage that could affect performance or safety
- Check the door mechanism alignment to ensure secure and smooth opening and closing
- Inspect and replace the gas strut with an OEM part to maintain proper door support and safety
- Examine the rotor chamber bowl for dents or damage and replace as needed to ensure safe operation
- Replace and confirm full functionality of all lid lock switches to maintain secure closure
- Inspect and lubricate the door lock mechanism, applying grease to the lid lock rail for smooth operation
- Test compressor functionality (if applicable) to ensure proper operation and consistent temperature control
- Conduct an 8-12 hour cycle test to validate consistent performance over prolonged use
- Confirm rotor motor stability, check for unusual noise, and assess mechanical integrity during operation
- Inspect the condensation drain and clear any clogs to prevent moisture buildup in the rotor chamber
- Verify RPM accuracy using an NIST-traceable tachometer and perform calibration as necessary
- Check the centrifuge error log to ensure zero recorded issues, confirming system reliability
Technician Inspection and Recertification Checklist: Centrifuges
The Following Checklist Is to Be Performed on All Incoming and Outgoing Pieces of Equipment
| Task |
Completed? |
Remarks? |
| Confirm power supply output voltages match specified requirements |
Completed |
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| Measure and verify voltages at PCB test points for accuracy |
Completed |
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| Confirm rotor compatibility and detection for proper identification |
Completed |
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| Inspect exterior for cosmetic or structural damage |
Completed |
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| Check door mechanism alignment for secure opening and closing |
Completed |
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| Inspect and replace gas strut with OEM part as needed |
Completed |
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| Examine rotor chamber for dents or damage and replace if necessary |
Completed |
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| Replace and confirm functionality of all lid lock switches |
Completed |
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| Lubricate door lock mechanism and lid lock rail for smooth operation |
Completed |
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| Test compressor (if applicable) for proper operation and cooling |
Completed |
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| Run 8-12 hour cycle test to ensure consistent performance |
Completed |
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| Check rotor motor for stability, noise, and integrity |
Completed |
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| Inspect and clear condensation drain to prevent buildup |
Completed |
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| Verify RPM accuracy with NIST traceable tachometer and calibrate |
Completed |
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| Check centrifuge error log for zero recorded issues |
Completed |
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To View More of Our Recertification Protocol Click Here
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