Features: 2 standard for your option: G1/2/G3-/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/Hour ( Test by oil liquid) flow pressure should start up to run oval gear) 0.5L/min. Mainly used for the measurement of liquids with high concentration such as milk, chemicals, engine oil, detergents, etc.(No impurity liquid). Package Includes: 1x Hall Flow Sensor Specifications: Material: plastic Length: approx 10.2cm/4-inch, 8cm/3.1-inch(optional) Wiring: Red-IN-Positive Terminal Yellow-OUT-Signal Output Black-GND-Negative Terminal 10.2cm sensor: Tread: G3-/8 Frequency: 2.5 x Q(L/MIN) Inner /outer diameter: 8mm/12.5mm Screw length: 29mm 8cm sensor: Tread: G1/2 Frequency: 2.5 x Q(L/MIN) Inner /outer diameter: 10mm/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.