Features: 1.Outstanding Performance: Reed switch is durable and reliable. Additionally, no moving parts to break. No adjustment needed for tank. 2.Wide Application: Suitable for boats, yachts, trucks, RVs, and IP67 protection can adapt to the harsh weather conditions. 3.Advantages: The main unit of the product is made of 316 stainless steel, rust proof and wear resistance, stable signal transmission, accurate and precise transmission. 4.Features: In order to keep the sender from touching the bottom of the tank, if it is a plastic tank, the length of the sender should be 1in less than the depth of the tank, and if it is a metal tank, it should be deeper than the tank 0.5in?1in. 5.Product Detail: The sender is with non linear output, it can only match standard gauges with non linear signals. Specification: Item Type: Fuel Water Level Sensor Material: Main Unit: 316 stainless steel Cable: PVC Float: NBR Mounting Method: Standard SAE 5 hole type Screw Size: M5 x 0.8 Hole Diameter: 5 mm / 0.20 inch Product Specification: 11in (280mm) Recommended tank size: 11.4in-12in (290-305mm) Output Signal: US standard 240-33ohms (240ohms at no load, 33ohms at full load) Resolution Range: Approx: 21mm/0.82in Fuel and Water Level Sensor Type: Resistance Alarm Switch Rated Current: 500mA Protection Level: IP67 Operating Temperature: -40F - +185F (-40C - +85C) Application: Ship, Yacht, Truck, RV Note: Kind tips: 1. This type of fuel tank sensor is 240?33 ohm, only suitable for 240?33 ohm fuel gauge. Please make sure your product is suitable for 240?33 ohms before purchasing. 2. When the oil level or water level is empty, there will be 3?15mm space between the sensor float and the bottom of the sensor. This is a safe distance and the fuel sender will work fine. 3. Please check the size and description of the product carefully before purchasing, if the fuel tank is plastic, the length of the gas tank liquid level sensor should be 1" smaller than the depth of the fuel tank, if the water tank is metal, the length of the liquid level sensor should be smaller than the depth of the fuel tank 0.5in?1in