Origin: Mainland China Cup body material: Stainless steel Number of cups: 1, 2, 3, 4, 5 Cup size: Approximately 44ml Total length: Approximately 345mm Cup inner diameter: Approximately 33mm Cup height: Approximately 57mm Product Usage: The immersion Zahn cup viscosity cup is manufactured in accordance with the American Society for Testing and Materials (ASTM) D4212-93 standard, "Standard Test Method for Dip-Type Viscosity Cups." This viscosity cup is designed for measuring the viscosity of Newtonian or near-Newtonian liquids. It is widely used in coatings, ink, gravure, letterpress, lithographic, flexographic, and screen printing industries for viscosity measurement before or during application. It helps maintain consistent viscosity within the desired range to ensure product performance and quality. The Zahn Cup is a common tool for liquid viscosity measurement. The dynamic viscosity is typically expressed in seconds and can be converted to centipoise using appropriate conversion methods (note: kinematic viscosity unit: mm²/s). Standard Test Method: ASTM D4212 – Dip-Type Viscosity Cups. The test liquid should be maintained at 25°C, with temperature fluctuations not exceeding ±0.2°C. Select the appropriate cup number based on the expected viscosity range of the liquid. Immerse the cup completely into the test liquid. Measure and record the liquid temperature inside the cup, then remove the thermometer. Use your index finger to lift the cup vertically by the handle ring, quickly and steadily. Start the stopwatch as the cup exits the liquid surface. Keep the cup no more than 15 cm above the liquid level during drainage. Stop timing when the continuous stream of liquid first breaks. Maintenance: With proper care, the Zahn Cup can last for many years. Clean with a soft cloth only—do not use wire brushes, sandpaper, or abrasive materials. Pay special attention to cleaning the orifice to remove residue, and avoid scratching the interior surfaces. It is recommended to clean the cup after each use, except during repeated testing. Model and Technical Parameters: Features: Round-head stainless steel construction, precision-drilled nozzle, fine craftsmanship, accurate measurement, durable Models: Zahn No. 1, No. 2, No. 3, No. 4, No. 5 Measuring range: 5–1840 mm²/s (centistokes) Conversion: Centistokes × specific gravity = centipoise Model Details: No. 1 Measuring range (mm²/s): Approx. 5–56 Nozzle diameter: 2.00mm Application: Very dilute liquids Flow time (s): 35–80 No. 2 Measuring range (mm²/s): Approx. 21–231 Nozzle diameter: 2.74mm Application: Thinners, mixed paints, varnishes Flow time (s): 20–80 No. 3 Measuring range (mm²/s): Approx. 146–848 Nozzle diameter: 3.76mm Application: Medium viscosity liquids, mixed coatings, varnishes Flow time (s): 20–80 No. 4 Measuring range (mm²/s): Approx. 222–1110 Nozzle diameter: 4.26mm Application: Thicker liquids and mixtures Flow time (s): 20–80 No. 5 Measuring range (mm²/s): Approx. 460–1840 Nozzle diameter: 5.28mm Application: Very thick liquids and mixtures Flow time (s): 20–80 Note: 1. Due to manual measurement, please allow a tolerance of 0.1–0.3mm. 2. Color may vary slightly due to monitor display differences. If you have any questions about this product, please . We will respond as soon as possible. Thank you for your support and happy shopping. Satisfaction Guarantee: Our priority is to provide you with a clear, pleasant, and worry-free shopping experience. We strive to present accurate and complete product information. We are always ready to assist with any questions or issues. If you are not satisfied with your purchase, please before leaving feedback. We will do our best to resolve any concerns. Refund Policy: We accept returns and full refunds if the product is not as described or arrives damaged. Please provide photos of the damage for a prompt resolution.