The apparatus consists of a polished brass or stainless-steel viscometer cup fitted with a standard orifice at the bottom, supported on a stable stand. It includes an oil cup, jet, and a suitable heating bath for maintaining the desired test temperature. A digital or mercury thermometer can be fitted for temp. monitoring. The flow time is compared with that of distilled water to express the result as Engler viscosity.It conforms to international standards IP 212 and ASTM D-490, ensuring reliable and accurate performance for lab. testing.