How it works
Real-Time Volume Verification
VVP air-based pipetting tools perform all aspirate and dispense functions via precise control of vacuum and positive pressure, respectively.
A silicon chip-based MEMS micro-sensor assembly incorporated into each liquid channel measures the pressure differential across a known constriction. Volumetric flow rate is a linear function of this pressure differential, allowing for instantaneous calculation of the actual volume of liquid entering or leaving each tip.
By monitoring and adjusting to volumetric flow in real-time, all pipetting processes can be controlled and finely tuned for any liquid, automatically accommodating for temperature and viscosity differences.
Live Pipetting Diagnostics & Error Recovery
- New levels of process security with continuous QC monitoring of all channels
- More robust workflows with advanced user-defined recovery for ‘on-the-fly’ corrections
- Final validation data report captures all pipetting data
Liquid Level Detection (LLD) with VVP
Independent-channel LLD on all liquid types is performed via controlled micro-releases of air from the distal end of the tip and subsequent monitoring of pressure changes associated with meniscus (or bubble/foam) interference. A residual volume based on the confirmed meniscus height and labware definition is calculated. Any pipetting discrepancies experienced are addressed via several user-defined error recovery options.
Air-based VVP technology accomplishes robust LLD without the need for more expensive carbon-impregnated (capacitance-based LLD) disposable tips. For the best pipetting results, be sure to use D2-brand ‘performance-certified’ clear disposable tips.