Drive	Control	Ratio	Pumphead options and tube wall	Maximum flow
323E	Manual	27:1 27:1	313D, 314D up to 6 channels, 1.6mm 313D2, 314D2 single channel, 2.4mm	2000 ml/min 2000 ml/min
323S	Enhanced manual	133:1 133:1 37:1 147:1	313D, 314D up to 6 channels, 1.6mm 313D2, 314D2 single channel, 2.4mm 304MC, 308MC up to 10 channels 501RL, 501RL2 single channel, 1.6/2.4mm	2000 ml/min 2000 ml/min 53 ml/min 2200 ml/min
323U	Enhanced manual and analogue auto	133:1 133:1 37:1 147:1	313D, 314D up to 6 channels, 1.6mm 313D2, 314D2 single channel, 2.4mm 304MC, 308MC up to 10 channels 501RL, 501RL2 single channel, 1.6/2.4mm	2000 ml/min 2000 ml/min 53 ml/min 2200 ml/min
323Du	Enhanced manual, analogue auto and RS232	133:1 133:1 37:1 147:1	313D, 314D up to 6 channels, 1.6mm 313D2, 314D2 single channel, 2.4mm 304MC, 308MC up to 10 channels 501RL, 501RL2 single channel, 1.6/2.4mm	2000 ml/min 2000 ml/min 53 ml/min 2200 ml/min
323Dz	Dispenser enhanced manual and remote start	200:1 200:1 300:1	313D, 314D up to 6 channels, 1.6mm 313D2, 314D2 single channel, 2.4mm 501RL, 501RL2 single channel, 1.6/2.4mm	2000 ml/min 2000 ml/min 3000 ml/min