Standard Tar Viscometer

Product Code : EL-BTLE-10458

Standard Tar Viscometer (code EL-BTLE-10458) is a bath instrument used to find the viscosity of cut back bitumen and road oil. Its chrome plated copper bath, fitted with a drain valve, has a central tube that takes the test cup and locates the stirrer; the unit stands on levelling feet, accepts 2, 4 or 10 mm dia test cups, is rated at 300 W and measures 262 × 262 × 550 mm, weighing about 10 kg.

Get a quote: use the Add To Cart enquiry button below, or send your quantity and delivery location through the contact page.

Specifications

What Is the Standard Tar Viscometer Used For?

The tar viscometer expresses viscosity as an efflux time: the number of seconds a fixed volume of binder takes to run out through the orifice of a standard cup at a set temperature. The cup, chosen from the 2, 4 or 10 mm sizes to suit the grade, is filled with the cut back bitumen or road oil and set in the central tube, the bath is brought to temperature while the stirrer keeps it even, and the valve is lifted to start the flow. The time taken to collect a marked volume of binder is the viscosity result. The standards listed are EN 12846 and 13357.

What to Specify When Ordering

• Quantity — the number of viscometers required.
• Test cups — the cup diameters needed: 2, 4 or 10 mm.

Frequently Asked Questions

What does the Standard Tar Viscometer measure?
It determines the viscosity of cut back bitumen and road oil, expressed as the time a fixed volume of the material takes to flow out through the orifice of the test cup.

Which cup sizes are available?
Test cups of 2, 4 and 10 mm diameter are listed, the sizes required under EN 12846, and the orifice is chosen to suit the viscosity of the binder.

How is the bath built?
The bath is chrome plated copper with a drain valve, and its central tube receives the test cup and positions the stirrer; the whole unit stands on levelling feet.

What features does the stirrer have?
The stirrer has a curved shield and an insulated handle, and it carries a thermometer socket and a swivel support for the valve.

What are its power, size and weight?
It draws 300 W, measures 262 × 262 × 550 mm and weighs approximately 10 kg, a size that sits on a laboratory bench.

OEM Manufacturer

The Standard Tar Viscometer is made by Engineering Lab Equipment (Engineering Labs Equipment Pvt Ltd) at its works at Plot No. 43, Industrial Park, Sector 2, Growth Center, Saha, District Ambala, Haryana, India. The company designs, makes and tests bitumen and asphalt testing equipment for binder tests, mix preparation and specimen testing for engineering colleges, polytechnics, technical training institutes and research laboratories in India and overseas, and can build equipment to an institution's own requirements. Tender and OEM enquiries are handled through the Tenders/OEM page.

Related Bitumen and Asphalt Testing Equipment

• Kinematic Viscometer Bath — desktop glass bath with electric stirrer and digital display for kinematic viscosity tube testing.
• Saybolt Two Tube Digital Viscometer — twin-tube Saybolt universal and furol viscometer with digital thermoregulated bath, 21 to 99 °C.
• Cut Back Bitumen Distillation Equipment — shielded hot-plate distillation set with 500 ml flask and 100 ml crow receiver for cutback bitumen.
• Rolling Thin Film Oven — oven with PID control ageing 8 rotating binder specimens from ambient to 200 °C for RTFO tests.

See the full Bitumen/Asphalt Testing Lab Equipment range or all Civil Engineering Lab Equipment.

Request a Quote

For this and other bitumen and asphalt testing lab equipment, schools and colleges can contact Engineering Lab Equipment, a manufacturer, supplier and exporter based in Ambala, India. To ask for a quotation, send the number of viscometers and the test cup sizes required and your delivery location through the contact page, or use the Add To Cart enquiry button on this page.

Last updated: October 2026