Engler Viscometer DEV-501

The instrument is designed and made as per ASTM D 1665 “Test Methods for Engler Viscosity of Petroleum Products”. It is used to determine the ratio obtained by dividing the time of flow, in s, of 200 ml of material using an Engler viscometer at a selected temperature by a factor representing the time of flow, in s, for an equal volume of water at 20 °C. The ratio is the Engler viscosity of the sample. The instrument can make determination for 2 samples at the same time in the same temperature environment. It can also calculate the average value of these test results. It is the best instrument for Engler viscosity of petroleum products and bituminous materials determination.

Specification :

Technical parameters

1. Power supply: AC 220V±10%, 50Hz

2. Standard water value: 51±1 s

3. Temperature range: 0～100°C

4. Temperature controlling accuracy: ±0.1°C

5. Graduated flask: 200±0.2ml (50±0.2ml for bituminous materials)

6. Inner container: Made by stainless steel

7. Timer: Max is 9999 s

8. Timing mode: timing by a LED

9. Heating power: 700 W

10. Ambient temperature: -10～+40°C

11. Relative humidity: ≤85%

12. Total power consumption: not more than 800 W

13. Dimensions (m): 0.63×0.49×0.76

Classic, Reliable Viscosity Measurement with the Engler Viscometer DEV-501

Determine the Engler viscosity of petroleum products, lubricants, bitumen, and industrial oils with the Engler Viscometer DEV-501—a precision-engineered, benchtop instrument designed for laboratories adhering to ISO 3104, ASTM D1665, DIN 51562, and GB/T 266 standards. Based on the time-based efflux principle, the DEV-501 provides a simple yet robust method for assessing fluid flow behavior, widely used in refineries, quality control labs, and educational institutions.

Engineered for Standardized Efflux Testing

The DEV-501 Engler Viscometer consists of a precisely calibrated brass or stainless-steel reservoir with a standardized orifice, mounted in a temperature-controlled water or oil bath (optional circulating bath available). The test measures the time (in seconds) required for 200 mL of sample to flow through the orifice at a specified temperature (typically 20°C, 50°C, or 100°C). The result is expressed as °Engler (°E), the ratio of the sample’s efflux time to that of distilled water under identical conditions.

Compliant with ISO 3104 & ASTM D1665 – Validated method for transparent and opaque petroleum liquids.
Precision-Machined Orifice & Reservoir – Ensures repeatability and adherence to international dimensional tolerances.
Integrated or External Bath Compatibility – Works with optional thermostatic bath (±0.1°C stability) for accurate temperature control.
Durable Construction – Brass or stainless-steel fluid path resistant to corrosion and wear.
Manual or Semi-Automatic Timing Option – Use built-in stopwatch or connect to digital timer for improved accuracy.
Complete with Calibration Certificate – Traceable to national standards for quality assurance.

Trusted for Routine and Educational Viscosity Analysis

While modern kinematic viscometers dominate high-precision labs, the Engler method remains widely used in regions and industries where °Engler is the traditional unit—particularly in Eastern Europe, Asia, and legacy oil-testing protocols. The DEV-501 offers a cost-effective, reliable solution for routine QC, incoming inspection, or academic instruction in fluid dynamics.

Whether you’re testing transformer oil, heavy fuel oil, or asphalt flux, the Engler Viscometer DEV-501 delivers consistent, standards-compliant results with timeless simplicity.

Measure flow the classic way—with precision you can trust.