WIDE APPLICATION: The fuel sending unit is suitable for automobiles, ships, speedboats, engines, generator sets, engineering machinery, agricultural machinery, modified vehicles and other fields, and without limitation of environment SENSOR MATERIAL: Fule Tank Sending Unit is made of heavy duty SUS316 Stainless Steel and rugged construction.It is the Direct Replacement for Arm Type sender. The advantages of fuel level sensor are accurate measurement, long service life, good shock resistance and corrosion resistance, keep you safe SENSOR SIGNAL: Boat fuel sending unit Output signal: 240-33 ohms. (240 ohms at empty, 33 ohms at full). Support 240-33 ohms Fuel Level Gauge and Water Level Gauge; PLEASE choose one length range and signal you need when placing the order MULTIPLE SIZES: The length range is 150MM, 175MM, 200MM, 225MM, 250MM, 275MM, 300MM, 325MM, 350MM, 375MM, 400MM, 425MM, 450MM and 500MM. The fuel level sender comes with gasket and mounting screws. Wiring instructions are simple and easy to follow EASY INSTALLATION: The water level gauge sensor is a Standard SAE 5-hole type. Easy to install and connect. Blue wire is connected to negative(-);Brown wire is connected to the gauge signal output. Operational Temperature: -40°C -+85°C. Stable output signal, universal style, suitable for all kinds of material tanks Geloo fuel sending unit has accurate measurement, long service life, good shock resistance and corrosion resistance,keep you safe.DESCRIPTION:-Output Signal: American standard 240-33 ohms(240 ohms at empty, 33 ohms at full).-Mounting: Standard SAE 5 hole pattern-Operational Temperature: -40°C to 85°C-Material: SUS316 Stainless Steel-Protection Rank: IP67-Easy installation: Positive red wire, negative blue-Length Ranger:150MM, 175MM, 200MM, 225MM, 250MM, 275MM, 300MM, 325MM, 350MM, 375MM, 400MM, 425MM, 450MM and 500MM.