Watson Marlow 313U peristaltic metering pump.
Specs: 
Max. flow rate2000 ml/min
Min. flow rate0.002 ml/min
Speed control ratio133:1, 147:1, 200:1, 27:1, 300:1 
Operating temperature range5 to 40 °C
Operating temperature range40 to 104 °F
Drive standardsCE, cETLus 
Drive ingress ratingIP31 
Drive power supply1ph, 100-120 V, 220-240 V 50/60 Hz, 100 VA