Fann Instrument Company Model 35 Viscometer
Fann produces a range of true Couette coaxial cylinder rotational viscometers. The Model 35 Viscometer is the best known and most commonly used Fann viscometer.
The test fluid is contained in the annular space or shear gap between the cylinders. Rotation of the outer cylinder at known velocities is accomplished through precision gearing. The viscous drag exerted by the fluid creates a torque on the inner cylinder or bob. This torque is transmitted to a precision spring where its deflection is measured and then related to the test conditions and instrument constants.
This system permits the true simulation of most significant flow process conditions encountered in industrial processing.
Direct Indicating Viscometers combine accuracy with simplicity of design, and are recommended for evaluating materials that are Bingham plastics. Model 35 Viscometers are equipped with factory installed R1 Rotor Sleeve, B1 Bob, F1 Torsion Spring, and a stainless steel sample cup for testing according to American Petroleum Institute Specification RP 13B.
Other rotor-bob combinations and/or torsion springs can be substituted to extend the torque measuring range or to increase the sensitivity of the torque measurement. Shear stress is read directly from a calibrated scale. Plastic viscosity and yield point of a fluid can be determined easily by making two simple subtractions from the observed data when the instrument is used with the R1-B1 combination and the standard F1 torsion spring.
Item ID | Size | Model | Includes | RPM Range | Calibrated | Temperature Range | Electrical Requirements | Price | Packaging |
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FANN 207198 | |||||||||
FANN 207198 |
26lb | 35A | Speeds 600, 300, 200, 100, 6, and 3 rpm | 3 to 600 | Yes | 5 to 40ºC | 115V/60Hz |
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FANN 207199 | |||||||||
FANN 207199 |
26lb | 35SA | Speeds 600, 300, 200, 100, 6, and 3 rpm | 3 to 600 | Yes | 5 to 40ºC | 115V/50Hz |
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FANN 207200 | |||||||||
FANN 207200 |
26lb | 35A/SR-12 | Speeds of 600, 300, 200, 180, 100, 90, 60, 30, 6, 3, 1.8, and 0.9 rpm | 3 to 600 | Yes | 5 to 40ºC | 115V/60Hz |
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FANN 207201 | |||||||||
FANN 207201 |
26lb | 35SA/SR-12 | Speeds of 600, 300, 200, 180, 100, 90, 60, 30, 6, 3, 1.8, and 0.9 rpm | 3 to 600 | Yes | 5 to 40ºC | 115V/50Hz |
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FANN 101671767 | |||||||||
FANN 101671767 |
26lb | 35SA/SR-12 | Speeds of 600, 300, 200, 180, 100, 90, 60, 30, 6, 3, 1.8, and 0.9 rpm | 3 to 600 | Yes | 5 to 40ºC | 115V/50Hz |
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FANN 101671771 | |||||||||
FANN 101671771 |
26lb | 35SA/SR-12 | Speeds of 600, 300, 200, 180, 100, 90, 60, 30, 6, 3, 1.8, and 0.9 rpm | 3 to 600 | Yes | 5 to 40ºC | 115/60 |
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FANN 101671770 | |||||||||
FANN 101671770 |
26lb | 35SA | Speeds 600, 300, 200, 100, 6, and 3 rpm | 3 to 600 | Yes | 5 to 40ºC | 115V/50Hz |
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FANN 101671768 | |||||||||
FANN 101671768 |
26lb | 35A | Speeds 600, 300, 200, 100, 6, and 3 rpm | 3 to 600 | Yes | 5 to 40ºC | 115/60 |
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FANN 206367 | |||||||||
FANN 206367 |
- | 35SA/SR-12 | Speeds of 600, 300, 200, 180, 100, 90, 60, 30, 6, 3, 1.8, and 0.9 rpm | - | No | - | - |
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FANN 206471 | |||||||||
FANN 206471 |
- | 35A | Speeds 600, 300, 200, 100, 6, and 3 rpm | - | No | - | - |
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FANN 206472 | |||||||||
FANN 206472 |
- | 35SA | Speeds 600, 300, 200, 100, 6, and 3 rpm | - | No | - | - |
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