P Digital Ultrasonic Cleaner, Versatile with Dual Frequency and Variable Power. The Elmasonic P ultrasonic cleaner is considerably more powerful than conventional ultrasonic units. If full power is too strong, the power is variable from 30-100% in 10% increments. Temperature is adjustable from 30°C to 80°C; the timer can be set from 1-60 minutes or for continuous operation. The unit turns off automatically after 12 hours of continuous operation for safety. All models have a rear drain with a convenient side valve. The Elma Ultrasonic P line features four ultrasonic modes: Standard for mixing, Sweep for cleaning, Degas, and Pulse. Sweep mode produces a continuous slight variation of frequency to provide uniform and thorough cleaning. Pulse mode produces intermittent spikes of additional ultrasonic power to dissolve nearly insoluble samples or to remove tenacious contaminants. Microprocessor control ensures that this sonic cleaner gives reproducible performance from run to run. The tank cover can be flipped over and used as a drip tray.