Cannon 9721-E50 CFOU- 25 Uncalibrated

Cannon 9721-E50 CFOU- 25 Uncalibrated

This Cannon 9721-E50 CFOU- 25 Uncalibrated the kinematic viscosity of dark and opaque Newtonian liquids using a reverse-flow design. As a result, it allows accurate measurements when the liquid meniscus cannot be observed at the timing marks. Therefore, it becomes a reliable solution where routine Cannon-Fenske viscometers are not suitable.

Moreover, this instrument complies with ASTM D445 and ISO 3104 standards. In addition, it conforms to ASTM D446 and ISO 3105 specifications, which ensures compatibility with established laboratory procedures. Consequently, laboratories can integrate this viscometer into standardized viscosity testing workflows without modification.

Furthermore, this model supports viscosity testing of cutback asphalts and road oils at 60 °C (140 °F) in accordance with ASTM D2170. As such, it covers a viscosity range commonly required in asphalt and petroleum laboratories. Additionally, users apply this viscometer to study lubricating and hydraulic oils at low temperatures, especially when evaluating the influence of additives.

Notably, external pressure can be applied during measurement. Therefore, users can vary shear stress and shear rate to support more advanced rheological analysis. Meanwhile, the uncalibrated configuration provides flexibility, since laboratories may perform internal calibration or choose a calibrated version if required.

Finally, optional holders ensure stable positioning in constant-temperature baths. As a result, the instrument maintains repeatable flow conditions during testing.

Product Features

Measures kinematic viscosity of dark and opaque Newtonian liquids
Uses reverse-flow design when the meniscus is not visible
Therefore improves measurement reliability for opaque samples
Complies with ASTM D445 and ISO 3104 methods
Additionally conforms to ASTM D446 and ISO 3105 specifications
Supports asphalt and road oil testing per ASTM D2170
Moreover suitable for low-temperature lubricant analysis
Allows external pressure to control shear stress and shear rate
Supplied uncalibrated for flexible laboratory calibration
Compatible with standard constant-temperature baths
Optional holders provide secure and stable mounting

Specifications

Model: 9721-E50 CFOU-25
Instrument Type: Cannon-Fenske Opaque Reverse-Flow Viscometer
Measurement Method: Kinematic viscosity by gravity flow
Applicable Standards: ASTM D445, ISO 3104
Additional Conformance: ASTM D446, ISO 3105
Asphalt Test Standard: ASTM D2170
Minimum Sample Volume: 12 mL
Minimum Bath Depth: 229 mm (9 inches)
Calibration Status: Uncalibrated
Calibrated Alternative: Model 9721-F50
Compatible Holders: 9726-M50 and 9726-M53
Typical Samples: Dark and opaque Newtonian liquids

Applications

Viscosity measurement of cutback asphalts
Road oil quality control testing
Petroleum and heavy oil analysis
Low-temperature lubricating oil studies
Hydraulic oil additive performance evaluation
Research laboratories and industrial quality control