CD 250
Discover the CD 250: a precision temperature-controlled cuvette holder engineered for absorbance, fluorescence, and circular dichroism spectroscopy. With a temperature range of -25°C to 110°C and integrated stirring. The CD 250 is compatible with specialized aluminum carriages, accommodating unique sample vessels commonly used in circular dichroism applications, an ideal solution for labs incorporating CD testing.
Absorbance, Circular Dichroism, FluorescenceThe CD 250 is a temperature-controlled sample holder designed for circular dichroism, featuring a flexible carriage system that accommodates a wide range of vessel types commonly used in these experiments. This carriage design allows for support of many vessels expanding its versatility beyond traditional setups. Standard cuvettes can be used as well, eliminating the need for a separate holder when switching between applications. We’ve also worked closely with customers to develop custom carriages tailored to their experimental needs. Since no carriage is included by default, be sure to add one to your quote. Available options are listed under the Accessories tab.
In addition to absorbance measurements, the CD 250 supports fluorescence applications. Optical windows in the holder enable compatible carriages, such as the CARR/10x10F, to facilitate fluorescence detection.
Operating between -25 °C and 110 °C, the CD 250 ensures precise thermal stability through a Peltier-based heat exchanger with circulating coolant. It supports sample stirring at a steady, reproducible rate and allows for controlled gas purging at lower temperatures to maintain optical clarity and improve insulation. Whether for stable-temperature spectroscopy or temperature ramping experiments, the CD 250 delivers reliable performance.
For extended temperature capabilities, a high-temperature option increases the upper range to 150 °C but must be selected at the time of purchase due to key internal modifications. Like all Quantum Northwest sample holders, the qpod provides unsurpassed temperature control, ensuring stable hold temperatures within a fraction of a degree.
Control is straightforward with the TC-1 Temperature Controller, included with purchase. Users can set temperatures, stirring speeds, and ramp rates via the TC-1’s front panel or through T-App, Quantum Northwest’s optional control software. T-App provides features such as real-time plotting, scripting, and direct sample temperature measurement when paired with the Probe/10K sensor. Even without T-App, the TC-1 display provides a direct readout of sample temperature when using the Probe/10K.
The CD 250 integrates with a wide range of spectrophotometers. The standard model mounts easily to both imperial and metric optical breadboards, with additional models available for specific instruments. Browse our available models to find one compatible with your instrument, and check the Accessories section for applicable carriages. If an existing model doesn’t fit your instrument, only partially meets your application requirements, or if you need a specialized carriage, contact us to explore customization options.
With its adaptable carriage system, the CD 250 offers a versatile solution for accommodating unique sample vessels while remaining easily configurable for standard cuvettes.
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Number of samples controlled | 1 Carriage (varied sample holder options) |
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Designed usage | Absorbance, Fluorescence. Circular Dichroism |
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Sample container size | Depends on Carriage |
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Optical ports per cuvette | 3 |
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Optical port dimensions | 12.5 mm round (2 Abs) and 12mm x10mm (1 Flu) |
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Built-in optical slit holders | 2 per cuvette |
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Cuvette z-height | 15 mm |
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Windowed jacket or vest available | No |
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Method of heat dissipation | Water Circulation |
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Programable temperature range |
-40 to 110°C |
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*Temperature range |
-25 to 110°C |
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Extended temperature options available | Yes, Only Heat option |
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**(Extended) Programable temperature range | -40°C to 150°C |
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**(Extended) Temperature range | -25°C to 150°C |
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Thermistor probes accepted | Probe/10k |
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Magnetic stirring motor type | Stepper |
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Default stirring speed | 1200 rpm |
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Stirring speed range | 1-2500 rpm |
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Stirring speed range (Best performance) | 60-1800 rpm |
*The holder's temperature performance depends on the operating environment and setup conditions, which must support proper heat dissipation and condensation reduction. While the listed temperatures are consistently achieved during testing, they are not guaranteed in all environments or setups. Meeting the ideal setup conditions outlined in the product's manual is necessary to achieve specific temperature stages.
**The extended range applies only when all corresponding High or Low customization options are implemented. The higher limit is extended by the High Limit package option, and the lower limit is extended by the Low Limit package option.
Included
Optional
(Needs 1 Optional Carriage for operation)
NIST-traceable calibration and performance data
Tubing for dry gas and water circulation
Equipment Cables
TC-1 Temperature Controller
Water Circulator System (BATH 10)
Magnetic stir bar (qty 1)
SLITS 250F
CARR/Film (Carriage)
CARR/31 (Carriage)
CARR/120 (Carriage)
CARR/121 (Carriage)
CARR/5mm (Carriage)
CARR/2mm (Carriage)
CARR/1mm (Carriage)
CARR/10x10F (Carriage)
CARR/10×10 (Carriage)
CAL/Single
ADAPT/Abs/5mm
ADAPT/Abs/2mm
ADAPT/Abs/1mm
ADAPT/Abs/0.5mm
Probe/10k
T-App Software
(Needs 1 Optional Carriage for operation)
Included
NIST-traceable calibration and performance data
Included
Tubing for dry gas and water circulation
Included
Equipment Cables
Included
TC-1 Temperature Controller
Included
Water Circulator System (BATH 10)
Included
Magnetic stir bar (qty 1)
Included
SLITS 250F
Optional
CARR/Film (Carriage)
Optional
CARR/31 (Carriage)
Optional
CARR/120 (Carriage)
Optional
CARR/121 (Carriage)
Optional
CARR/5mm (Carriage)
Optional
CARR/2mm (Carriage)
Optional
CARR/1mm (Carriage)
Optional
CARR/10x10F (Carriage)
Optional
CARR/10×10 (Carriage)
Optional
CAL/Single
Optional
ADAPT/Abs/5mm
Optional
ADAPT/Abs/2mm
Optional
ADAPT/Abs/1mm
Optional
ADAPT/Abs/0.5mm
Optional
Probe/10k
Optional
T-App Software
Optional
Manufacture
Model
Shimadzu
CD 250/UV1280
None
CD 250/stnd
Shimadzu
CD 250/Shimadzu
Perkin Elmer
CD 250/PE1050
Jasco
CD 250/J815
Hitachi
CD 250/Hitachi
Thermo
CD 250/EVO
Dynamica
CD 250/Dynamica
OLIS
CD 250/DSM
OLIS
CD 250/DM45
Agilent
CD 250/Cary50-60
Agilent
CD 250/Cary4000-6000
Agilent
CD 250/Cary100-300
Applied Photophysics
CD 250/AP
Agilent
CD 250/8454
Agilent (HP)
CD 250/8453
Agilent (HP)
CD 250/8452
More information for a custom approach with this product
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