Fixed Volume Pipettors

Fixed volume pipettes are designed to deliver a single predetermined volume, with the piston stroke mechanically locked and cannot be adjusted by the operator. This design offers several benefits. Because volume change is eliminated, it is no longer a source of user variability. The internal mechanics are also simpler than those of adjustable volume instruments. Thus, fixed volume pipettes tend to exhibit superior long-term calibration stability under equivalent workloads, reducing the frequency of recalibration interventions. Fixed volume pipettes are ideal for highly repetitive tasks with a strong requirement for accuracy and precision, such as routine testing, diagnostics, and reagent preparation. When selecting a fixed volume pipette, the primary considerations are the accuracy and precision specifications at the stated volume, tip compatibility, and features such as full autoclavability.