ZNN-D6 Six-Speed Rotational Viscometer This instrument is manufactured in accordance with the Q/02NSJ002-1998 standard. It can measure various rheological parameters, plot rheological curves based on multi-point measurement data, determine the flow pattern of liquids during the flow process, and select appropriate formulas for accurate measurement of non-Newtonian fluids. It features convenient operation and precise testing. It is suitable for viscosity measurement of drilling fluids in major oil fields, research institutes, and laboratories, as well as for applications in geology, chemical engineering, coal, metallurgy, brewing, and other industries. Technical Parameters: - Measurement Range: Newtonian fluids 1–300 mPa·s Non-Newtonian fluids 1–150 mPa·s - Shear Stress: 0–153.3 Pa - Motor Power: 7.5 W / 15 W - Power Supply: 220 V ± 10%, 50 Hz - Rotational Speed: 3, 6, 100, 200, 300, 600 r/min - Dimensions: 290 × 170 × 410 mm