... use;- High vacuum, intelligent temp. control- Display of Rotary Speed, Heating Bath Temp. & Vacuum Rate;- Bath Lifting ... valve, durable and easy use.- Popular model among Senco rotary evaporators. Standard ModelR502DR503DParameters1Evaporating Flask (L)5L / F505L / ... . A different experience-- Simple & RelexedSENCO, China made, Rotary Evaporator, Experiemental, Lab scale, Pilot Production, Water Bath, ...