Designed for applications where remote switchable polarity is required, the Alpha IV Series of 100w high voltage 19″ rack mounting power supplies are available in 10kV and 20kV output voltage models. These high voltage power supplies employ solid state switching techniques allowing for fast polarity reversal while maintaining excellent line and load regulation. The use of high stability components within the feedback system ensures a low temperature coefficient of less than 10ppm/degree C. Coupled with good long and short term drift they are suitable for use in high sensitivity research and test applications such as mass spectrometry, surface science and nuclear equipment. The output voltage may be controlled from 50V to maximum (10kV or 20kV) of either polarity by means of front panel controls, analog signals or USB interface.