This Electrolab Multi-Channel Peristaltic Pump Variable Speed with102R Pumphead is in great condition, has been tested and is guaranteed to be functional. These pumps came from a local lab that had surplus lightly used equipment. We urge customers to view all photos as they show overall condition, included accessories and functionality. Please feel free to contact us with any questions. Please Note: The only minor issue worth noting is the unit emits a slight mechanical noise when in the mid-range RPM's. This noise is present in both units and does not affect functionality in any way. DESCRIPTION The low flow rates required in bio-processing and similar research mean that peristaltic pumps (also called low flow rate pumps) face special demands in these environments. As leaders in fermenter hardware, it was logical for Electrolab to develop a range of single and multi-channel pumps to complement its fermenter and cell culture equipment. Key Features of Electrolab Low Flow Rate Pumps Designed to run reliably at low flow rates Available in single or multi channel versions Economically priced and designed to stack Multi Channel Pump: Flow range 0.02 to 72 mls/hr *The flow is dependent on the type of pump head fitted and the tube size used. Pumphead Description The 102R low-flow oem pumphead accepts, without adjustment, all Watson-Marlow tubing from 0.5mm (1/50") to 4.8mm (3/16") internal diameter with 1.6mm (1/16") wall thickness. it has a spring loaded, two roller rotor and is suitable for continuous use up to 65rpm providing flow rates up to 106 ml/min (intermittent use up to 130rpm giving flow rates up to 212 ml/min). The 102R may be driven in either direction: clockwise rotation will give a longer tube life but anticlockwise rotation can be used for working against greater pressures. It is available with a choice of track material and rotor springs and is suitable for either a 6mm or 8mm drive shaft if mounted on users' own drive. All 102R pumpheads have a choice of mounting points and a shatterproof clear polycarbonate guard which is hinged to allow easy access for tube changing. Snap-in connectors can be supplied in place of the sprung tube clamps.