TBR, Tannas Basic Rotary Viscometer
High Temperature, Low Shear Rate Rotational (Absolute) Viscometer
A low-shear (1-200 reciprocal seconds) rotational viscometer that measures true viscosity (dynamic) not a combined viscosity-density value (kinematic). This is very important when distinguishing the viscous properties of synthetic and mineral oils or when comparing water-based and oil-based lubricants. For automotive applications the TBR has been found particularly useful in measuring the viscosity of sooted diesel engine oils.
The TBR maintains a constant shear rate from 1 to over 200 reciprocal seconds (sec-1), depending on speed setting and rotor size. The instrument analyzes fluids with viscosities ranging from 1 to 35,000 cP with the current Rotor design. For measuring higher viscosities, a different size Rotor may be required. This can be investigated and manufactured on a project-by-project basis, and the instrument can be customized to fit your needs. The desired operating temperatures would be required for such a project to commence.
When measuring oils with viscosities too high to manually (hand) inject into the TBR via the syringe, a Pump Controller is required.
- Operating temperatures: Ambient to over 200°C (+/- 0.1°C)
- Sample measurement time approximately 5 minutes, depending on sample type.
- Incorporates the Chase-flush technique for sample injection.
- Fifty (50) mL sample size recommended.
- Excellent for measuring viscosities of ‘used’ and ‘heavily sooted’ oils.
- AutoSampler Delivery System available.
- Over-temperature Cut-out Fuse
- CE Marked
Principle:
- High temperature, low shear rate rotational (absolute) viscometer.
Dimensions:
- Viscometer: ~ 32 lbs. (10″ x 10″ x 16″) or (25 x 25 x 41 cm)
- Console Box: ~7 lbs. (8.5″ x 13″ x 5.5″) or (22 x 33 x 14 cm)
Operating Temperatures:
- Ambient to over 200°C (±0.1°C)
- Sub-ambient temperature operating information upon request.
Shear Rate Capabilities:
- Maintains constant shear rate from 1 to over 200 reciprocal seconds (sec-1), depending on speed setting and rotor size.
Read-out:
- Continuous viscosity reading directly into centiPoise (cP).
Sample Volume:
- Fifty (50) mL sample size is recommended.
Viscosity Range:
- The TBR is capable of analyzing fluids with viscosities ranging from 1 to 35,000 cP with the current Rotor design. For measuring higher viscosities, a different size Rotor may be required. This can be investigated on a project basis. The desired operating temperatures would be required for such a project to commence.
- When measuring oils with viscosities too high to manually (hand) inject into the TBR via the syringe, a Pump Controller is required.
Accuracy & Repeatability:
- TLS-I Viscometer – Specially modified Brookfield Viscometer with traditional Brookfield torque accuracy: ±0.1, reproducibility: ±0.2%.
- A repeatability study conducted with 10 back-to-back analyses on the TBR resulted in a Relative Standard Deviation of 0.083% with repeatability at 0.23%.
Voltage:
- 120 VAC, 50/60 Hz (Also available in 220 VAC)
Safety:
- Over-temperature Cut-out Fuse
- CE Marked
Special Features:
- Sample measurement time as quick as 5 minutes, depending on sample type.
- Incorporates the Chase-flush technique for sample injection.
- Excellent for measuring viscosities of ‘used’ and ‘heavily sooted’ oils.
- AutoSampler Delivery System also available.