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SAY BOLT VISCOMETER AZA0950
The AZA0950 Saybolt Viscometer from AZALAB is a fundamental laboratory instrument designed to determine the empirical viscosity of petroleum products, lubricants, and bituminous materials. Viscosity—defined as a fluid’s resistance to flow—is a critical performance parameter influencing lubrication efficiency, fuel handling, and asphalt workability.
The Saybolt method measures efflux time, providing a standardized and widely accepted indication of flow behavior at controlled temperatures.
Description
Working Principle of AZA0950 Saybolt Viscometer
The AZA0950 operates by measuring the time required for 60 mL of a liquid sample to flow under gravity through a calibrated orifice at a specified temperature.
Saybolt Orifice Types
Saybolt Universal Viscometer (SUV)
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Smaller orifice diameter
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Suitable for low- to medium-viscosity fluids
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Typical test temperatures:
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37.8 °C (100 °F)
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98.9 °C (210 °F)
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Results expressed in Saybolt Universal Seconds (SUS)
Saybolt Furol Viscometer (SFV)
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Larger orifice (≈ twice the diameter of Universal)
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Used for high-viscosity materials such as fuel oils and bitumen
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Typical temperatures: 120 °C to 240 °C
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Results expressed in Saybolt Furol Seconds (SFS)
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SFS values are approximately one-tenth of SUS for the same material
Construction and Design – AZA0950
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Electrically heated oil or air bath
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Digital PID temperature controller
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Motorized bath stirrer for uniform heat distribution
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Precision-machined brass or stainless-steel viscometer tubes
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Standard 60 mL receiving flask
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External stopwatch for efflux timing
Standards Compliance
The AZA0950 Saybolt Viscometer is designed to conform to:
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ASTM D88 – Saybolt Viscosity
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AASHTO T72 – Saybolt Viscosity
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IP 70
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IS 1206 (Part 1) – Applied principles
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IS 8887:2004 – Bitumen Emulsion for Roads (Saybolt Furol reference)
Key Features of AZA0950
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High-precision temperature control (±0.1 °C)
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Dual capability: Saybolt Universal & Furol
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Robust, corrosion-resistant construction
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Uniform bath temperature via motorized stirring
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Suitable for continuous quality-control testing
Applications of AZA0950
Petroleum Industry
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Lubricating oils
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Fuel oils
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Crude and refined petroleum products
Road & Infrastructure (India)
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Cut-back bitumen
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Road oils
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Bitumen emulsions (RS, MS, SS grades as per IS 8887)
Industrial & Research
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Hydraulic and gear oils
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R&D formulation studies
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Batch consistency verification
Saybolt vs Kinematic Viscosity
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Saybolt viscosity is empirical (time-based)
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Kinematic viscosity is absolute (cSt)
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Approximate conversion possible using ASTM charts
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Saybolt remains relevant for routine QC and legacy specifications
Technical Specifications – AZA0950
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Model: AZA0950
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Test Method: Saybolt Efflux Time
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Test Volume: 60 mL
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Viscosity Types: SUS / SFS
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Temperature Range: Ambient to 240 °C (up to 300 °C optional)
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Temperature Accuracy: ±0.1 °C
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Heating: Electric immersion heater
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Stirrer: Motorized
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Power Supply: 230 V AC, 50 Hz, Single Phase
Supplied Accessories
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Saybolt Universal orifice
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Saybolt Furol orifice
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60 mL receiving flask
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Thermometer holder
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Withdrawal tube
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Filter funnel
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Bath unit
Optional Accessories
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ASTM/IP calibrated thermometers
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Certified viscosity standard oils
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Digital stopwatch
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Orifice cleaning wire
FAQ – AZA0950 Saybolt Viscometer
Q1. What does AZA0950 measure?
Empirical viscosity expressed in Saybolt Universal Seconds (SUS) or Saybolt Furol Seconds (SFS).
Q2. SUV vs SFV?
SUV uses a smaller orifice for lighter fluids; SFV uses a larger orifice for viscous materials.
Q3. Is AZA0950 relevant in India?
Yes. It is referenced in IS 8887 for bitumen emulsions and widely used in MoRTH-aligned QC labs.
Q4. How important is temperature control?
Critical. Even minor temperature variations significantly affect viscosity readings.
Q5. Maintenance requirements?
Routine cleaning of orifices, calibration with standard oils, and periodic thermometer verification.
Additional information
| Model Number |
AZA 0950 |
|---|---|
| Test Type |
Saybolt Viscosity (Empirical Viscosity by Efflux Time) |
| Application |
Lubricating oils, fuel oils, light fuel oils, crude oils, bituminous materials (asphalt, cut-back bitumen). |
| Heater |
Immersion heating elements. |
| Stirrer |
Motorized stirrer for bath temperature uniformity. |
| Receiving Flask |
Standard 60 ml Saybolt Receiving Flask. |
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