JULABO's digital SW22 and SW23 Shaking Water Baths have a temperature range from 20°C...99.9°C. Built in circulation pump allows for more precise temperature stability and uniformity. Provides up to 2000 watts of heating power and PID control ensures temperature stability of ±0.02°C. High and low temperature warning functions. Built-in timer and RS232 interface. Bath opening (51 x 30 x 18 cm) accommodates many different types of racks and trays. Shaking frequency is adjustable from 20 rpm to 200 rpm, or can be switched off entirely.