Series 7000 generator/tank systems feature a two system ultrasonic cleaning unit. This is comprised of a spearate tank and generator and is capable of driving anywhere from 12 to 36 elements per tank. They are available in in either 25kHz or 40kHz. Each board (which is in multiples of 6) can be operated independently through lighted panel switches. This allows one power supply to drive multiple tanks reducing the cost and saving space.