Industrial Technologies

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In most glass capillary viscometers, the samples flow under gravity. When liquids are too viscous to flow readily under gravity, vacuum viscometers may be used to measure viscosity (in mPa•s or cP). In these instruments a vacuum is applied to one end of the viscometer to pull the liquid through the capillary into the timing bulb(s). CANNON offers several types of vacuum viscometers, including the Cannon-Manning Vacuum , the Asphalt Institute Vacuum, and the Modified Koppers Vacuum. Like the Cannon-Fenske Opaque viscometer, these are all “reverse flow” viscometers. Vacuum viscometers require a vacuum that is very accurately controlled. The CANNON DVR-1000 or DVR-1500 Digital Vacuum Regulator is an ideal instrument for maintaining constant vacuum.

AIV Calibrated Series
For measurement of viscosity of highly viscous materials such as asphalt cement at 60°C (140°F) according to ASTM D 2171. Applicable to materials with viscosity range of 0.036 to 80 000 poise. Vacuum of 300 mm Hg is applied to small arm with timing bulbs; two bulbs are incorporated to extend viscosity range of viscometer. Similar to the Cannon-Manning Vacuum, but with graduated capillary instead of two timing bulbs.

AIV-RO Calibrated Series
Permanently attached round metal holder, for hole 51mm (2 inches) in diameter. Provided with certificate of calibration and instruction sheet. For sizes 400R and 800R, the "roofing" design is normally used for segment B, below, which extends the viscosity range to 1400000 and 58000000 poise, respectively. Minimum sample volume 3mL. Require liquid bath depth of 180 mm (7.1 inches).