Cannon Fenske type Opaque viscometer from AMK Glass, size 700. Nominal constant of 100, intended for viscosity range of approximately 20000-100000 cSt. Additional information from AMK Glass:
A popular reverse flow viscometer that has two separate timing bulbs allowing a check of results in the same test. Requires a minimum bath depth of 10 inches and a sample of 12mL. Each viscometer has a permanent serial number.
| Part# | Size | Nominal Constant | Viscosity Range ( cSt.) | Measure |
| AST 445-1B | 25 | 0.002 | 0.4 to 2 | Each |
| AST 445-2B | 50 | 0.004 | 0.8 to 4 | Each |
| AST 445-3B | 75 | 0.008 | 1.6 to 8 | Each |
| AST 445-4B | 100 | 0.015 | 3 to 15 | Each |
| AST 445-5B | 150 | 0.035 | 7 to 35 | Each |
| AST 445-6B | 200 | 0.1 | 20 to 100 | Each |
| AST 445-7B | 300 | 0.25 | 50 to 200 | Each |
| AST 445-8B | 350 | 0.5 | 100 to 500 | Each |
| AST 445-9B | 400 | 1.2 | 240 to 1,200 | Each |
| AST 445-10B | 450 | 2.5 | 500 to 2,500 | Each |
| AST 445-11B | 500 | 8.0 | 1,600 to 8,000 | Each |
| AST 445-12B | 600 | 20.0 | 4,000 to 20,000 | Each |
| AST 445-13B | 700 | 100.0 | 20,000 to 100,000 | Each |
| | | | |