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CD 250

User-customizable Temperature-controlled holder for a wide variety of cuvette types or solid samples
Product Overview

The CD 250 is a temperature controlled sample holder that accommodates a wide range of cuvettes or other sample media. This versatility is accomplished by using a removable carriage which firmly mounts within the temperature controlled tower of the CD 250. Cuvette carriages are available for several kinds of cuvettes, including those that are square, rectangular or cylindrical, as well as other samples such as small plates or films. Other carriages can be inexpensively designed as needed! Mix and match carriages to fit the needs of any experiment or laboratory setup!

Fused silica windows may be placed on each side of the sample or cuvette to minimize convection losses. The CD 250 primarily used for absorbance measurements, although depending on the carriage design, an additional optical port at 90 degrees to the excitation may be available for observation of fluorescence or photochemical excitation.

The standard CD 250 is mounted on a base with a metric hole pattern for mounting on an optical breadboard. We have mounting options compatible with a wide array of spectrophotometers from different manufacturers, or contact us today for a custom mounting solution to meet your experimental needs! Check out the available options below!

The CD 250 is ideal for work in temperature ranges from -15 °C to 110 °C. Circulating coolant (usually water) is used to remove heat from the Peltier heat exchanger. The CD 250 will maintain precise sample temperatures and stir at a steady reproducible rate, with the ability to flood the optics in a controlled gaseous environment while working at lower temperatures to maintain optical clarity. Use the CD 250 to measure spectra at precisely maintained temperatures, or for temperature ramping, to observe changes with temperature.

Purchase the extended temperature option to increase the maximum temperature up to +150 °C and turn your unit into the ultimate, do-anything machine!

It is easy to operate the CD 250 using the TC 1 Temperature Controller, included in the purchase price. The sample temperature, stirring speed, and temperature ramp rate may be controlled manually using the TC 1 menu control buttons on the front panel, or by using Quantum Northwest’s computer control software,  T-App, available for purchase.

Product Features

Accepts wide variety of cuvette types
Rapid, precise Peltier temperature control
Optional extended temperature range
Strain-free, fused-silica windows

Optional optical port at 90 degrees
Variable-speed magnetic stirring
Dry gas purge
Base for mounting on an optical breadboard
Probe input for sample temperature
NIST-traceable temperature calibration

  • Technical Specifications
    Number of cuvettes controlled
    Typical use
    Absorbance, circular dichroism, fluorescence
    Standard cuvette size
    Wide range of sizes and styles
    Optical ports per cuvette
    2 absorbance, 1 fluorescence
    Optical port dimensions
    12.5 mm diameter round
    Fluorescence port dimensions
    12 mm high x 10 mm wide
    15 mm
    Built-in optical slit holders
    2 per cuvette
    External windows available
    Normal factory set temperature range
    -40 °C to +105 °C
    Temperature range easily achievable
    -15 °C to +105 °C
    Range with special techniques
    -25 °C to +150 °C
    Extended temperatures achievable
    Depends on cuvette
    Temperature accuracy
    Better than ±0.3 °C from 0 ⁰C to +80 ⁰C
    Accuracy greater range
    Better than ±0.5 ⁰C from ‐20 ⁰C to +110 ⁰C
    Temperature reproducibility
    Better than ±0.07 °C
    Thermistor probes accepted
    Series 400 or Series 500
    Magnetic stirring motor type
    Magnetic stirring speed range
    1-2500 rpm
    Default stirring speed
    1200 rpm
    Stirring speed best performance
    60-1800 rpm
  • Basic Package

    CD 250 cuvette holder (requires carriage – see Accessories)
    TC-1S – Temperature Controller
    Two fused silica windows in screw-in holders
    Bath 10 – Circulator System
    NIST-traceable calibration and performance data
    Accessories – Magnetic stir bar, tubing and cables

  • Available Modifications

    Applied Photophysics Spectrometers

    CD 250/AP


    OLIS Spectrometers

    CD 250/DSM


    Agilent/HP Spectrometers

    CD 250/8454

    CD 250/8453

    CD 250/8452

    CD 250/Cary60

    CD 250/Cary300

    CD 250/Cary5000


    Dynamica Spectrometers

    CD 250/Dynamica


    Hitachi Spectrometers

    CD 250/Hitachi


    Perkin Elmer Spectrometers

    CD 250/PE1050


    Shimadzu Spectrometers

    CD 250/Shimadzu

    CD 250/UV1280


    Thermo Scientific Spectrometers

    CD 250/EVO


    Jasco Spectrometers

    CD 250/J815

  • Accessories
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