Controls for Tube Furnaces
With the furnace chamber control, the temperature is only measured in the furnace chamber outside the working tube.
Function and equipment
Furnace Chamber and Charge Controls
With the furnace chamber control, the temperature is only measured in the furnace chamber outside the working tube. This protects the thermocouples from damage and aggressive batch. The control is slow to avoid overshoots. Since the temperature inside the working tube is not measured in this mode, a significant temperature difference can occur between the batch temperature inside the tube and the furnace chamber temperature displayed in the controller. With an additional charge thermocouple, the "charge control" mode can measure the temperature in the furnace as well as the temperature inside the working tube. This enables the batch temperature to be controlled very precisely and quickly. Charge control can be used with all tube furnaces, with the exception of the RD and RT series.
Three-Zone Furnace Chamber Controls
The heated length is divided into three heating zones. The temperature is measured via one thermocouple per zone, which is positioned outside the working tube between the heating wires. The side zones are controlled via a setpoint offset in relation to the middle zone. In this way, the heat loss at the tube ends can be compensated in order to achieve an extended zone of constant temperature (+/− 5 K).
Freely Radiating Heating Elements
A very good temperature uniformity is achieved with the freely radiating heating elements on support tubes.
Further products
Catalog
A complete overview of our extensive range of furnaces, ovens and accessories for the laboratory can be found in our “Laboratory” catalog.
