Features: 3 types to select, choose different type according to your needs. Stable performances, large flow, high precisions and fast response. Made from quality material, leakproof, wear , high sensitivity. The product is mainly used for testing oil, the cover is made from aluminum alloy material. Good pressure resistance, can bear pressure up to 30kg. Specifications: Interface: DN8 Voltage: DC3.5-24V Inner Diameter: 11.75mm Thread Length: 12.4mm Flow Range: 30-300L/H1%(Liquid is Water) Water Pressure Resistance: 1.0MPA Pulse Frequency: Hz=[1.5xQ]1% High Level Output Pulse: Large Than DC4.5V(Input DC5V) Output Pulse Duty Ratio: 5010% Working Current: 15mA(DC5V) Colour: Random colors, no specified colors accepted Material: Aluminum alloy + Package Contents: 1 x Fluidmeter 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.