Durable Materials and Construction: Made from high-quality brass with over 57% copper content, this flow meter is designed to resist oxidation and wear Its rugged construction ensures long life and reliability in measuring water flow in a variety of applications. Application versatility: This flow meter is primarily used for water heaters and water dispensers, and its versatility extends to a wide range of applications Its precision and durability make it ideal for residential, commercial, and industrial use where accurate water flow measurement is critical. In order to prevent particles and debris from entering the sensor, a filter must be installed at the water inlet of the sensor; The water flow sensor should be installed inside the equipment or indoors. Do not expose it to harsh environments such as outdoor or humid and high temperature for a long time. The water flow sensor should be installed away from vibration and shaking environments and applications to avoid affecting the measurement accuracy of the sensor. Material: copper Color: as shown Package Contents: 4 x Water flow sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.