Light weight, compact, easy to install. Copper impeller shaft, wearable liner. No leakage of the sealing ring of the upper and lower power structure Copper impeller shaft, wearable liner. Product name:Brass flow sensor Thread Connection:G3/4 / OD 2.58cm / 1 IN Mounting Position:Horizontal & Vertical Application:Water heater, Water meter...etc. Flow Sensor Technical Data: (1) Flow Rate:1-30 L/min (2) Flow Pulse:F=6.6*Q ± 3%,Q=L/min (3) Working Voltage:DC3.5V - 18V (4) Working Current:15mA (5) Suffering Pressure:Max 1.5Mpa (6) Working Temperature:0℃ - +80℃ (7) Min Insulation Resistance:100M Ohm (8) Output Pulse Duty Cycle:50% +/- 10% (9) Max output Pulse Voltage: DC4.7V (input voltage DC5V) (10) Min Output Pulse Voltage:Less than DC0.5V (input voltage DC5V) (11) Sensor:Hall effect sensor, Digital Output. (12) wire connection: Terminal ( Red): " + " Terminal (Black):Vout " - " Terminal (Yellow) signal:output NPN signal pulse (13) Connector:Housing SM2.54-3P Tips:The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Type:-B5 Colour:Gold Material:copper Size:50x26mm 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.