Gilmont Falling Ball Viscometer
Ideal for routine plant quality control checks and research laboratory applications.
This viscometer is extremely easy to use; First fill tube with sample, then invert tube, allowing the ball to enter the PTFE screw. Next, restore tube to normal position. Finally fill tube with sample, then invert tube, allowing the ball to enter the PTFE screw. Next, restore tube to normal position. Finally, turn the knob to release the ball, and measure the time of descent. Reading the viscometer is easy—the ball moves against a white background with red reference lines. Repeatability with good technique varies from ±0.2 to ±1.0%, depending upon time of descent. To time falling ball, order stopwatch/clock on page 1207. Viscometers require a 7 mL sample volume.
Each viscometer is supplied with one glass (20 - 200 centipoise) and one 316 stainless steel high-precision ball (100 - 1000 centipoise). For viscosity ranges from 1000 - 2000, use the optional tantalum ball (order separately).
Viscometers are made of precision-bore glass tubing with stabilizing beads. The ball-release device is sealed with a Viton® O-ring.
Note:PTFE O-rings are available for use with liquids that adhere to Viton; call our Application Specialists for more information. Corrosion-resistant DELRIN® makes up the other plastic viscometer parts.