jar testing apparatus/ flocculator set of 3 test designed for flocculator formation tests in water treatment plant with variable speed from 0-250 rpm with pm d/c geared motor. special light arrangement at bottom, capacity 2,4 & 6 stirrer. there are digital and non-digital both models also available. specifications : » display: digital - 12 mm red led for temperature, speed, time» number of jars - available in 2,4,6 jar» variable speed range - 20 to 200 rpm approximately» operation on 230 volts,50 hz, single phase, ac supply» digital rpm indication