Thyracont has introduced a new, patented vacuum transducer with a very wide range of pressure measurement from 1000mbar to 1x10-9mbar. The device uses a Pirani/hot cathode measurement principle: the patented Thyracont impulse Pirani with extended measuring range activates ionization sensors on below a very low pressure threshold. This protects the sensors and improves vacuum life.
In addition to its wide measuring range and increased lifetime, features of the VSH82MV include excellent repeatability and high accuracy, low thermal and electrical interference with the vacuum process, and an insensitivity against gas irruption. The device features Bayard-Alpert with double filament, such that the gauge automatically shifts to the backup filament in the event of failure.
Outputs include a logarithmic 0-10V signal output and a digital output with RS485 interface.
Applications include analysis instruments, coating processes, controlling fine to ultrahigh vacuum, sputtering appliances and process engineering. A typical example would include the brazing, sintering or annealing of metals, which requires an atmosphere free of oxygen. The vacuum level must be monitored and kept constantly low during the process to avoid oxidation of the products. The VSH82 transducers have the required wide measuring range to detect the pressure at the furnace gas inlet and the vacuum port with excellent precision. They can be linked to the system PLC via their inbuilt RS485 interface, so that both pressure levels can be directly visualized in a graphic display. This allows for easy monitoring of the pressure gradient inside the furnace tube.
