Vacuum gauges and controllers

State-of-the-art vacuum gauges for laboratory and industrial operation have to meet high standards in terms of gauge head resistance to chemicals, reliability in rugged applications and operator-friendly interfaces. VACUUBRAND has a comprehensive range of electronic measuring instruments for the range of atmospheric pressure to 5 x 10-9 mbar.
 
A lot of applications in the laboratory call for electronic vacuum regulation, that is, constantly adapting the pump's volume flow rate to process requirements. The maximum volume flow rate of the unregulated pump can be changed in various ways:

by cyclically turning the pump on/off (with the VNC 2 controller or the CVC 3000 controller with module VMS-B) by cyclically opening/closing an in-line solenoid valve (CVC 3000 or VNC 2) or by changing the pump´s motor speed continuously (VARIO® pumps in connection with CVC 3000 or VNC 2 VARIO)
 

• We use a capacitive ceramic diaphragm gauge head in the rough vacuum range to 0.1 mbar that measures independent of the type of gas and is exceptionally resistant to chemicals. It also has outstanding measuring accuracy and long-term stability.

• Pirani vacuum sensors are preferably used in the lower rough and fine vacuum ranges from below 10 mbar to 10-3 mbar. They measure the heat conductivity of a gas that depends on the gas density and, therefore, pressure. The accuracy of this measuring process is best in the range of 100 to 10-2 mbar. The reading display depends on the type of gas and deviates from the air adjustment (at the factory) depending upon the heat conductivity of the specific gas being measured. The new Pirani vacuum sensor VSP 3000 features an exceptional chemical resistance and robustness compared with conventional Pirani sensors (with metallic filament) as its wetted parts are made of special plastics and ceramics.

• The final touch is put on this range of a product with an ATEX-approved measuring instrument for use in locations with potentially explosive atmospheres per ATEX category 2.

• The new DCP 3000 gauges (as CVC 3000 und VNC 2 controllers) as well as the recommended accessories use VACUU·BUSTM as their communication system. Uniform plug and socket connections make the system flexible and allow extension of the lines up to 30 m. The measuring instruments and components are completely self-configuring. Components connected to the gauges and controllers are automatically recognized, configured and supervised. At the DCP 3000 up to eight external vacuum sensors (four VSK 3000 and four VSP 3000) can be connected for simultaneous monitoring on the spot. Additionally the DCP 3000 can be used for relative pressure measurements (using VSK 3000 vacuum sensors as a reference) and as a data logger for up to 32,000 measurement values. For high vacuum measurements the DCP 3000 allows the connection with the combined Penning/Pirani gauge head MPT 100.

A lot of applications in the laboratory call for electronic vacuum regulation, that is, constantly adapting the pump's volume flow rate to process requirements. The maximum volume flow rate of the unregulated pump can be changed in various ways:

• by cyclically turning the pump on/off (with the VNC 2 controller or the CVC 3000 controller with module VMS-B)
• by cyclically opening/closing an in-line solenoid valve (CVC 3000 or VNC 2) or
• by changing the pump´s motor speed continuously (VARIO® pumps in connection with CVC 3000 or VNC 2 VARIO)

While VNC 2 is mostly used in vacuum network solutions where parameters are set once to control vacuum conditions, the CVC 3000 is normally used as a workplace controller with its large display and user-friendly full-text menus. 

Accessories can be easily connected to both controllers: A coolant valve, an external venting valve or a liquid level sensor for catchpots are often required. Communication with connected components is via the VACUU·BUS^TM control system. The auto-configuration of VACUU·BUS^TM rules out any mix-up of components. Chemically resistant IP 67 connectors allow the connection of many components.

VACUU·BUS^TM

• self-configuring plug and play
• sealed plugs highly resistant to chemicals
• no danger of getting plugs confused
• connect almost any number of components