This Brass Water Flow Sensor is designed for accurate water flow measurement. APPLICATION: Suitable For: water heaters, campus drinking fountains, direct drinking machines, vending machines, and smart card-operated systems. With temperature detection. Light weight, compact, easy to install. Note: The YF-B6 and ZJ-B6 labels on the product are sent randomly, but they have the same function and will not affect usage. PARAMETERS: Connection Size: G3/4 Voltage: DC3.5-24V Pressure: ≤1.75MPa Suitable medium: Water (no impurities) Medium temperature: -20~100°C Insulation resistance: Greater than 100MΩ Flow Range: 1-30L/min Pulse range: F=(6.6*Q) error ≤3%, i.e., 396 pulses per liter of water Output pulse high level: Greater than DC4.7V (input voltage DC5V) Output pulse low level: less than DC0.5V (input voltage DC5V) Usage Guidelines: Sensor Usage Notice: Install a filter at the water inlet to prevent debris. It is recommended to install the sensor indoors or inside equipment to avoid humidity, high temperatures, or harsh environments. Keep it away from vibrations and magnetic materials to ensure accuracy. Unauthorized disassembly is prohibited. Color: Gold Material: Brass Package Contents: 1 * 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.