The BUCHI Vacuum Controller V-850 is a laboratory vacuum control instrument designed for accurate monitoring and regulation of vacuum pressure in compatible BUCHI laboratory systems. The unit shown in the photograph is clearly identified as Vacuum Controller V-850 and features a large digital display, START/STOP controls, four function keys and a rotary control knob.

The photographed controller is shown powered on, with the display indicating approximately 965 mbar, demonstrating that the display and front control interface are active at the time of photography. The V-850 was designed as part of BUCHI's earlier-generation vacuum-control systems and can be connected to compatible BUCHI vacuum pumps through dedicated communication cables. BUCHI documentation specifically confirms V-850/V-855 connections with compatible V-300 and V-600 vacuum pumps. Cloudinary

The unit has visible cosmetic wear, scratches, discoloration and surface marks from previous laboratory use. BUCHI lists the V-850 as a legacy vacuum controller with production ending in 2015 and identifies the I-300/I-300 Pro as its replacement generation. BÜCHI Labortechnik

Applications

The BUCHI V-850 is suitable for vacuum regulation in laboratory evaporation and distillation workflows, particularly applications involving compatible BUCHI vacuum pumps and rotary evaporation systems.

Typical applications include rotary evaporation, controlled solvent evaporation, vacuum distillation, concentration and other laboratory processes where controlled vacuum pressure is required. The controller can provide centralized monitoring and adjustment of system pressure when correctly connected to a compatible vacuum source.

Main Features

• BUCHI Vacuum Controller V-850
• Large digital pressure display
• START and STOP controls
• Four front-panel function keys
• Large rotary control knob
• Manual vacuum control operation
• Pressure monitoring in mbar
• Designed for laboratory vacuum systems
• Compatible with selected BUCHI vacuum pumps
• Suitable for rotary evaporation and vacuum applications

Technical Specifications

BUCHI documentation confirms dedicated communication cables between the V-850/V-855 vacuum controller and V-300/V-600 vacuum pumps. Cloudinary

Benefits of Refurbished Laboratory Equipment

Refurbished laboratory vacuum controllers can provide a cost-effective solution for laboratories maintaining compatible BUCHI evaporation and vacuum systems. A legacy controller such as the V-850 can be particularly useful as a replacement or spare unit for existing equipment where compatibility with the installed pump and system is confirmed.

Purchasing refurbished equipment can also reduce replacement costs compared with acquiring a completely new vacuum-control system. Before installation, the controller should be professionally checked for pressure-sensor accuracy, display operation, keypad response, rotary control operation, communication with the intended vacuum pump and electrical safety.

Additional Information

The photographed BUCHI V-850 is visibly powered on and displaying a pressure reading of approximately 965 mbar. This confirms that the display is active in the photographed condition, but it does not by itself establish complete vacuum-control accuracy or communication performance.

The V-850 is a legacy BUCHI controller, and BUCHI's current documentation identifies it as a discontinued model. Compatibility with the intended vacuum pump should therefore be verified before purchase. Communication cables, vacuum tubing, sensors, pumps and other accessories are not assumed to be included unless specifically shown or stated. BÜCHI Labortechnik

• BUCHI Official Website
• BUCHI Vacuum Pump V-300 / V-600
• BUCHI Spare Parts & Service Availability