datasheet - Dolomite Microfluidics

The Dolomite Centre LtdUnit 1, Anglian Business Park, Orchard Road,Royston, Hertfordshire, SG8 5TW, UKT: +44 (0)1763 242491F: +44 (0)1763 246125E: sales@dolomite-microfluidics.comW: www.dolomite-microfluidics.comDolomite Microfluidics – North America OfficeBlacktrace Inc, 29 Albion PlaceCharlestown, MA 02129, USAC: 617 803 6655T: 617 848 1121F: 617 500 0136E: salesus@dolomite-microfluidics.comElectro-osmotic PumpCores and Accessoriesproduct datasheetDescription 2Main benefits 3Specifications 3Voltage and control 4Typical Performance 4Filling and Flushing 5Geometry and Interface 5Electro-osmotic Pump Open Interface 6EO Pump seal pack – 5 Top and 5 Bottom 7seals Power Supply for EO Pumps 7Custom Option 7pageThe Dolomite Centre Limited Page 1 of 8

The Dolomite Centre LtdPart namePart numberElectro-osmotic Pump Core Basic 3200246Electro-osmotic Pump Core Bubble Free 3200247Electro-osmotic Pump Open Interface 3200251EO Pump Seal Pack – 5 Top and 5 Bottom 3200252Power Supply for EO Pumps 3200274DescriptionDolomite offers a range of advanced Electro-osmotic (EO) pumps which can significantlyreduce the influence of electrochemistry and bubble formation compared to conventionalEO pumps.Dolomite’s range of EO Pumps consists of different “cores” from Osmotex which aremounted within a “holder”.The EO Pump Core Basic and Bubble Free are lightweight and low power solutions whichoffer excellent pumping performance, ideal for integration in compact or portableinstruments.The EO Pump Core Basic does not include provisions for suppressing bubble-formationand electrolysis but requires an open inlet reservoir, and will also leave gas bubbles in theflow path under typical circumstances (low voltage pumping of ethanol can be anexception).It is recommended that the EO Pump Core Basic is used with an externalbubble trap for optimum results.The pump cores can be used with a wide range of fluids (see table on page 3).Electrochemical reactions should still be considered when selecting new liquids.Standard cores are delivered un-calibrated, and the flow rate will vary with fluid andpressure. In the future, Dolomite will be offering self-priming EO Pumps as well assolutions with flow-sensor feedback control using the Mitos Flow Sensor range.EO Pump Core Basic (top view),Part No. 3200246EO Pump Core Bubble Free top view (left) and bottom view(right), Part No. 3200247MAR-000055 v1.9 Page 2 of 8

The Dolomite Centre LtdMain benefitsVery compact and lightweightReduced influence of electrochemistryLow power consumptionSilent during operationLow cost, suitable for volume applicationsSpecificationsTechnicalInformationShapeDiameterThicknessHousing materialEO Pump Core Basic(Part No. 3200246)Circular disc15.4mm3.8mmPETEO Pump Core Bubble Free(Part No. 3200247)Operating voltageTypical Flow rateFlow rectificationPressurePowerconsumption1.5V – 15V DC (max. 12V for aqueous media)15 - 150µl/minNot required, continuous0 – 10PSIFrom a few mW up to a few 100 mW (varies across the wide rangeof performance settings and liquids)Temperature rating 10-40CExpected lifetimeUp to at least 4000 hours, but highly dependent on liquid(electro)chemistryTested fluidsDI water, polar organics andionic solutions as well as somealcoholsDI water and 0.5x standardTBE bufferMAR-000055 v1.9 Page 3 of 8

The Dolomite Centre LtdVoltage and controlThe flow rate through the core depends on the applied voltage. Flow rate is alsodependent on back pressure as well as being liquid dependent.For a positive applied voltage, the flow is from top (clover leaf side) to bottom (vent holeside). Although the pumps can be run backwards, this is not recommended as bubbleformation will block the membrane and could cause damage. For simple experiments,Dolomite provides a controllable Power Supply (Part No. 3200274).Connection to the core should be made using sprung contacts or conductive epoxy.Under no circumstances should a heat bonding technique be used as this will causepermanent damage.The EO Pump Cores should not be run at higher voltages than 15V (12V for aqueous)and should never be allowed to run dry, as this could lead to breakdown of the electrodesand porous pump structure.Typical PerformanceTypical flow-pressure characteristics, curves for 5, 6, 7, 8, 9, 10, 11 and 15V DC from leftto right (fluid: DI water)MAR-000055 v1.9 Page 4 of 8

The Dolomite Centre LtdElectro-osmotic Pump Open Interface (Part No. 3200251)The EO Pump Open Interface uses EO Pump Seal top and bottom to create a secureconnection to the EO Pump Basic and Bubble-Free Cores.Dolomite’s new Electro-osmotic Pump range- openDolomite’s new Electro-osmotic CorePump range- assembledThe Electro-osmotic Pump Open Interface provides a 3ml open for fluid intake and a ¼-28fitting for fluid output. The interface is supplied with 0.5m cable with free stripped ends toconnect to any suitable power source supply or the Power Supply for the EO pump (partnumber 3200274).Main Benefits of Electro-osmotic Pump Open InterfaceSpring pins and twist action lid allow easy connection and disassembly from thepumpSprung top to provide an even and consistent pressureFixed reservoir retained in the lidEasy connection via 2 core cable (supplied)Venting holes to allow use of bubble-free pumps¼”-28 UNF fitted positioned for use on a bench surfaceNo screws or tools requiredMAR-000055 v1.9 Page 6 of 8

The Dolomite Centre LtdEO Pump seal pack – 5 Top and 5 Bottom seals (Part No. 3200252)Suitable for use with both Basic and Bubble free, the seals provide a secure connectionbetween the EO Pump Core and Interface. The top seal provides a watertight seal andtwo holes for electrical connections whilst the bottom seal provides venting holes for usewith EO Pump Core Bubble Free.Power Supply for EO PumpsThis power supply is suitable for use with the EO Pump core and Interface. The powersupply has an operating voltage range of 1.5V to 30V DC. The output voltage is controlledmanually via a dial and LCD display showing accurate indication of output voltage andoutput current.The power supply is supplied with: AC power input cable - UK AC power input cable – Europe AC power input cable - US 2 x wires with crocodile clipsCustom OptionsWhilst our standard cores cover a wide range of conditions, Dolomite can also developcustomized solutions for higher flow rates and pressure and can assist with the integrationof cores into customer designed holders. Please contact us for more information.MAR-000055 v1.9 Page 7 of 8

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