Dispensing Pipettor. Pipettors are widely used in laboratories They are an accurate method of transferring solutions or reagents. They also reduce exposure to samples or laboratory chemicals. Consisting of two parts, a reusable pipettor draws up fluid through the disposable tip which actually holds the fluid in a preset, precise volume. The fluid never reaches or touches the actual pipettor. The disposable pipettes cost only pennies and are discarded after each use. Pipettors are avail- able in either fixed or adjustable volume. Adjustable Volume Pipettor. 200/pk. Easy volume setting by simply turning the plunger Streamlined tip for access to narrow containers and tubes 0.50ml Fixed Volume Pipettor.