Supplementary Modules By-pass module

Flow rates in the nanoliter range starting at 1 µl/h With the by-pass module, constant small flow rates reaching the nanoliter range can be obtained. The technology is based on the partitioning of flow according to the relationship of the fluidic resistance of two capillaries. The flow is generated by a micro annular gear pump and shows very good constancy with little pressure dependence. This technology creates an almost pulsation-free master circulation, from which a side current is derived. The smallest flow rates starting at 1 µl/h can be achieved. Depending on the differential pressure and flow rate range, an adjusting range of 1:100 may be obtained. The lower limit of flow rate is defined by tuning the two capillary tubes and can be adjusted according to customer needs from 1 to 10,000 µl/h. Advantages Flow rate in Nanoliter range - flow rate from 1 µl/h to 10 ml/h - Wide flow rate range - small-volume dispensing with an adjusting range maximum 1:100 - Low-pulsation delivery - damped... Flow rate: 1 - 10,000 µl/h Adjustment range: 100 Differential pressure range: 0 – 3 bar Maximum inlet pressure: 1 bar Pulsation: < 1% Liquid temperature range: -20 ... +60 °C Viscosity range: 0.3 - 100 mPas Fluid connection: tubing, OD 1/8"; master capillary: tubing, OD 1/8"; secondary capillary: tubing, OD 1/16" Wetted parts: PEEK™; fittings and tubings: ETFE, PEEK™ Dimensions (L x W x H): 32 x 25 x 25 mm (By-pass block without pump) Weight: approx. 160 g (version 316L without pump) approx. 50 g (version PEEK™ without pump) Remarks: subject to technical changes