The XL-2000 Microson Ultrasonic Homogenizer has a selector switch on the front panel which allows the operator to activate a thumb switch on the hand-held convertor to manually pulse the energy transmitted to the probe. This feature provides greater control for the operator. It replaces the available foot-activated switch when pulsing of the sample is desired. The improved load monitoring and frequency tracking features guarantee that the probe operates more efficiently to deliver consistant sonication intensity at any given amplitude (power) setting which results in shorter processing times and greater sample-to-sample consistency. The built-in wattmeter and digital LCD display provide an accurate, continuous readout of the power delivered to the probe allowing the operator to easily monitor sample processing. Various probes are available for processing different sample volumes and a Micro Cup Horn allows for the safe processing of hazardous or pathogenic samples inside of sealed vials.