The 100 series is Watson-Marlow's low-flow single-channel range, used world-wide with fermenters. Two cased pumps are available, the 101U/R variable speed pump with auto analog and manual control, and the 101F/R fixed speed pump fitted with synchronous motors to allow exact speeds to be maintained. The 102R pumphead is available in versions which accept continuous tubing or elements, and in faceplate-mounted OEM drives with fixed (102FS/R) or variable speed motors (102FD/R). An OEM speed control board is available for the 101FD/R. | 
