Models CTB9400, CTB9500

Calibration bath

Heating bath or heating and cooling bath

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Applications of the calibration bath

  • Calibration in laboratories and in control and instrumentation workshops
  • Calibration of short temperature sensors, particularly in the pharmaceutical and food industries
  • Simultaneous calibration of several sensors

Special Features of the calibration bath

  • Controller with 5.7" colour touchscreen and menu navigation in 11 languages
  • 2 x USB (host, device), Ethernet and RS-232 interface
  • High-accuracy, reliable temperature control
  • 5-point calibration for control sensors (optional)

Description of the calibration bath

Calibration in baths
WIKA calibration baths are an ideal temperature source for the calibration of temperature probes, both in the workshop and the laboratory.

For calibration, the test items and the standard thermometer are brought to the same temperature within the calibration bath. As soon as a stable temperature has been reached, the test items are read, or their output signals measured, and compared with the standard thermometer.

In order to achieve a small measurement uncertainty within this comparison, a temperature control unit is needed which guarantees a homogeneous temperature distribution and a constant temperature over time within the calibration range. These requirements are fulfilled by these calibration baths.

Along with the calibration bath, the bath fluid also plays a significant role. To ensure homogeneous temperature distribution, the selected fluid should have a high thermal conductivity and low viscosity.

Moreover, the fluid should be inert, have a low vapour pressure, should not decompose chemically, not burn, and should maintain its properties over a wide temperature range.

In practice, silicone oils have proven themselves here.

Temperature ranges from -45 … +300 °C 
(-49 ... +572 °F)
The calibration baths are available in two different versions:

  • Model CTB9400 for 28 ... 300 °C (82.4 ... 572 °F)
  • Model CTB9500 for -45 ... +200 °C (-49 ... +392 °F)

The calibration baths are typically used in calibration laboratories and in control and instrumentation workshops for the calibration of thermometers.

Easy to use
The calibration baths feature a temperature-controlled tank with a usable depth of 200 mm (7.87"). The maximum immersion depth for the test items of 200 mm (7.87") reduces heat dissipation errors, resulting in smaller measurement uncertainties.