M018 Hydrostatic Head Tester is designed to measure the resistance of fabrics to water penetration. The method is generally intended for dense fabrics e.g. Tarpaulins and tenting. A specimen is subjected to a steadily increasing pressure of water on one face, under standard conditions, until penetration occurs in 3 places. The result measures the resistance of a fabric to the penetration of water under hydrostatic pressure. It is applicable to all types of fabrics, including those treated with a water resistant or water repellent finish. The instrument can perform following standards: