The ASTM D3890-18 standard provides a method for measuring the stroke count of mechanical pump dispensers for spray and Flow rate type pump dispensers. This practice is used to visually compare different pump dispensers and their perfusion characteristics for different products, helping to establish specifications for pump dispensers and final Encasements. This method can effectively evaluate and optimize the performance of pump dispensers to ensure that they meet the needs of product perfusion. Users need to establish appropriate safety, health and environment specifications before use, and confirm the applicability of regulatory restrictions.