What is a Reducing Tube? In some models/sizes of Eppendorf pipettes, a reducing tube, also known as “filling tube”, is used to regulate air flow. It is used in pipettes where the ratio between the shaft orifice and the piston diameter is such that, during aspiration of the liquid, a turbulence will be created in
Read More… from What is the use for the Eppendorf reducing tube and why does it need to be replaced?
PipetteSupplies.com stocks both Teflon and Polyethylene piston seals. Polyethylene Pipetman seals are the most popular option and are injection molded. Teflon Pipetman seals are machine molded. Polyethylene seals have tighter tolerances; Teflon seals are more pliable, and tighter. Both seals are autoclavable once and have about the same durability. Related Posts: Pipette Parts – Life Span,
Read More… from Gilson Pipetman Teflon vs. Polyethylene Seals
There are many brands of pipette controllers with names such as Pipet-Aid, FastPette, Accu-jet pro, S1 Pipet Filler, Easypet, etc. These are simple instruments with two functions: aspiration and dispensing. How much sample to take-up or push-out is controlled by your finger and there is no calibration adjustments on these units. The glass or plastic
In some situations (note the following exception), it is only necessary to verify the accuracy of one channel. The exception being critical experiments where regulatory agencies mandate that all channels must be gravimetrically evaluated (using correct equipment and procedures) and accuracy and precision properly documented. All channels in a multichannel pipette are driven by a
Read More… from Do I need to verify the accuracy of all channels? (Multichannel Pipettes)
Have you ever been frustrated by non-linear volume readings at different volume settings after inspection, cleaning, or preventive maintenance? For example, let’s say you’ve completed the initial pipette evaluation steps: pipette inspection, cleaning, preventive maintenance, lubrication of parts as per manufacturer’s recommendations, and replacing wearable components (seal, o-ring, etc.). The mechanical parts appear to be
Read More… from Non-Linear Volume Readings – When Should A Calibration Adjustment Be Made?
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