Often, when trying to pipette viscous media such as glycerin, fats, oils, or cosmetics, the high resistance of these materials causes the air column in typical pipettors to expand, changing the calibration of the instrument. In the Transferpettor the piston directly contacts the sample, eliminating the air column and, consequently, the opportunity for variation in the sample volume. Pro pipette is being heralded as the first electronically operated repetitive manual dispenser. The pipettor can be set for timed dispensing with preset time intervals between 0.1 and 1.0 second. The Repeater Pro pipette also employs an automatic tip recognition system that recognizes Eppendorf Combitips and displays the mode and the number of dispensing steps.
Small increments allow hundred of volume selections.
The Volac Ultra is the only United Kingdom-manufactured digital pipettor. In fact, the PTFE seals can be installed in 5 to 6 minutes, and a special calibration tool allows the volume to be changed with a simple turn of a screw. Greenfield also provides detailed diagrams and wall charts for recalibrating all makes of pipettors. The SoftGrip pipettes include adjustable volume, fixed volume, multichannel, and positive displacement models. Each of these instruments is autoclavable and features a soft nonslip handle that is designed to fit the user's hand comfortably.