These twin stage vacuum pumps from American company Mastercool are suitable for use with small to medium closed-loop systems as well as chambers and ovens. They have a dual voltage capacity and fins to keep them cool during extended use. The base is large and light-weight for stable positioning.
A twin stage pump has two rotors and vanes - one stage creates a vacuum and one cleans the system, ultimately creating a deeper vacuum. Faster evacuation, a cleaner process and quieter operation is possible with a twin stage.