Features: 2 standard for your option: G1 or 2 or G3- or 8 thread. Seal Ring with the upper and lower force structure never leaks. Different liquid flow ranges are different, and the number of output pulses is different. Flow rate : 5-300L or Hour ( Test by oil liquid) flow pressure should start up to run oval gear) 0.5L or min. Mainly used for the measurement of liquids with high concentration such as milk, chemicals, engine oil, detergents, etc.(No impurity liquid). Specifications: Material: plastic Length: approx 10.2cm or 4-inch, 8cm or 3.1-inch(optional) Wiring: Red-IN-Positive Terminal Yellow-OUT-Signal Output Black-GND-Negative Terminal 10.2cm sensor: Tread: G3- or 8 Frequency: 2.5 x Q(L or MIN) Inner or outer diameter: 8mm or 12.5mm Screw length: 29mm 8cm sensor: Tread: G1 or 2 Frequency: 2.5 x Q(L or MIN) Inner or outer diameter: 10mm or 20.5mm Screw length: 29mm Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Hall Flow Sensor Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.