CTO-20A/20AC Column Oven

Shimadzu has a new lineup of column ovens available for your laboratory. Please visit our HPLC/UHPLC Column Ovens page to learn more.

Prominence HPLC Column Ovens

CTO-20A Column Oven

Large-capacity, forced hot-air circulation units, the CTO-20A/20AC HPLC column ovens precisely regulate the temperature around the column. Automatic fan-speed control varies with the set temperature to provide stable analysis that is not influenced by the ambient temperature.

CTO-20A - Precise Temperature Control

A forced-air circulation-type column oven, the CTO-20A can regulate the temperature from 10ºC above room temperature to 85ºC. Rapid temperature equilibration allows complex temperature programs incorporating linear and/or step-wise increases and decreases in temperature.

CTO-20AC - Column Cooling Supported

The CTO-20AC can heat and cool the column compartment, utilizing a Peltier cooling device to provide sub-ambient conditions. Temperature control is regulated over a wide range, from 10ºC below room temperature to 85ºC, for increased reproducibility and separation performance.


Precise Temperature Regulation
The interior of the oven is precisely regulated with a high-performance thermistor. The temperature is calibrated at two different temperatures to ensure a high level of temperature accuracy.

Large Inner Space
In addition to the column, other system parts can be accommodated. These include:

  • Manual injector
  • Gradient mixer
  • High-pressure flow-line selection valves (2-position/6-port valves or 6-position/7-port valves, two in total)
  • Conductivity-detection cell block
  • Pre-or post-column reaction coil

Column Management Device (CMD)
Both the CTO-20A and 20-AC support the CMD. The CMD provides:

  • Recorded information about column usage
  • Amount of mobile phase delivered
  • Composition of the last mobile phase used
  • Number of samples injected

This information is managed through an LC workstation (with LabSolution) or a PC in the network using the CBM-20A System Controller's Web-control function.

Optional Flow-Line and Column Selection Valves
The FCV-20AH2/20AH6 valves are stand-alone, high-pressure, flow-line or column selection valves. The valve position is controlled by event signal input. Direct control is also possible from the unit itself.


  CTO-20A CTO-20AC
Temperature-control method Forced-air circulation
Cooling method None Electronic cooling
Temperature-setting range 4oC to 85oC
Temperature-control precision 0.1oC max.
Temperature-control range 10oC above room temperature to 85oC 10oC below room temperature to 85oc
Storage capacity 10 columns, max 25 cm length
Storable devices 2 manual injectors, gradient mixer, 2 high-pressure flow-line selection valves, etc.
Time program Linear temperature programs supported
Safety measures Solvent sensor, temperature fuse, temperature upper limit
Operating temperature range 4oC to 35oC
Dimensions, weight 260 (W) x 415 (H) x 420 (D) mm, 20 kg 260 (W) x 415 (H) x 420 (D) mm, 23 kg
Power requirements 100 VAC, 500 VA, 50/60 Hz

Top of This Page