Maximum pressure for digestions. For difficult to digest samples, the parameter pressure is very important. When using microwave digestion systems, the maximum pressure is limited. Therefore, pressure digestion systems are an attractive alternative for challenging digestion processes. Berghof pressure digestion vessels convince by an easy handling and useful accessories. Reactor Systems. Due to their large field of applications, reactors are often used in research and development, but also for production. The Berghof reactors convince by easy handling and individual configuration options. Therefore, they can be used perfectly for synthesis or material testing, but also for customer specific applications.