Kimble® Kontes® Constant Addition Funnels with Standard Taper Joint, Graduated

The constant addition funnel design is based on the Mariotte principle and assures the drop rate regardless of the liquid level. Internal delivery scale is graduated to allow accurate resetting on successive runs. Precision-type for setting flow rates from 1 to 160 drops per minute of water at 25°C. Shut-off seal is made by lowering the PTFE shoulder into a specially formed glass seat. Constructed of borosilicate glass, PTFE, and CTFE. Probe Fluoroelastomer O-ring is size 110. Suitable for use under moderate vacuum. 19/22 refill valve/stopper has a special bore to permit initial equilibration of the apparatus when it is used under vacuum. Graduated and numbered both up and down. Supplied with operating instructions.