---
product_id: 527070577
title: "100Tech20\"(510mm) Marine Fuel Sending Unit Float Replacement for Boat Vehicle RV Fuel Sender Gas Tank Sending Unit Diesel Level Sending Unit Water Level Sensor Fuel Gauge Sending Unit 240-33 ohm"
brand: "100tech"
price: "R$1886"
currency: BRL
in_stock: true
reviews_count: 4
url: https://www.desertcart.com.br/products/527070577-100tech20-510mm-marine-fuel-sending-unit-float-replacement-for-boat
store_origin: BR
region: Brazil
---

# Marine-grade durability Precision readings Easy installation 100Tech20"(510mm) Marine Fuel Sending Unit Float Replacement for Boat Vehicle RV Fuel Sender Gas Tank Sending Unit Diesel Level Sending Unit Water Level Sensor Fuel Gauge Sending Unit 240-33 ohm

**Brand:** 100tech
**Price:** R$1886
**Availability:** ✅ In Stock

## Summary

> ⛵ Navigate with Confidence!

## Quick Answers

- **What is this?** 100Tech20"(510mm) Marine Fuel Sending Unit Float Replacement for Boat Vehicle RV Fuel Sender Gas Tank Sending Unit Diesel Level Sending Unit Water Level Sensor Fuel Gauge Sending Unit 240-33 ohm by 100tech
- **How much does it cost?** R$1886 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/527070577-100tech20-510mm-marine-fuel-sending-unit-float-replacement-for-boat)

## Best For

- 100tech enthusiasts

## Why This Product

- Trusted 100tech brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Crafted from 316 stainless steel for unmatched corrosion resistance.
- • **Hassle-Free Setup:** Install in just 15 minutes with all parts included.
- • **Smooth Sailing Ahead:** Experience accurate fuel readings even in choppy waters.
- • **Custom Lengths Available:** Need a different size? We've got you covered!
- • **No Moving Parts, No Worries:** Say goodbye to mechanical failures with our innovative design.

## Overview

The 100TECH 20" Marine Fuel Sending Unit is a state-of-the-art replacement designed for boats, vehicles, and RVs. Utilizing advanced magnetic technology and high-quality materials, it offers precise fuel level readings without the hassle of moving parts. Built from durable 316 stainless steel, this unit ensures longevity and reliability in marine environments. With an easy installation process and customizable lengths, it's the perfect solution for any watercraft owner.

## Description

100Tech20"(510mm) Marine Fuel Sending Unit Float Replacement for Boat Vehicle RV Fuel Sender Gas Tank Sending Unit Diesel Level Sending Unit Water Level Sensor Fuel Gauge Sending Unit 240-33 ohm

## Features

- [ Direct Replacement For Swingarm Sender, Smoother Readings When In Rougher Water]  100TECH Reed Switch Fuel Sender Unit is Designed Based on Magnetic Technology And Made With Series of High Quality Reed Switches & Fixed Resistors. It Does Not Require A Float On An Arm. Dramatically Reduces Slosh Fluctuations Over Swing-arm Units. No Moving Parts To Break,No Moving Parts To Break. It Moves Freely, Accurately Indicating The Fuel Level In the Tank.
- ［Rugged Construction,Long Service Life］The Body of 100TECH Sender Are Made From  316 Stainless Steel.  The Benefit of using 316 Stainless Steel Include Its Corrosion Resistance And Lasting Durability For Marine Applications. You May Pay A Little More Upfront, But In The Long Run, You'll Save Money Since You Won't Have To Replace Your Sender As Frequently. You Can't Tell The Difference By Simply Looking At It. However, 304 Rusts Faster As It Has Less Nickel And No Molybdenum.
- The Fuel/Water Level Sensor with American standard output 240-33 ohms (240 ohms at empty, 33 ohms at full). If you Need Lengths Other than 4"-24", Please Contact us Directly for More Information.
- ［Easy To Install,All Parts Included］SAE 5 hole Mounting Pattern. The Substantial Flange Can Seal The Tank Completely. The Fuel Sender Comes with 1pc of NBR Gasket(1pc), 5pcs of SUS 316 M5 Mounting ScrewsWell-written And Illustrated Instructions; The Wiring Instructions Are Straight Forward And Easy To Follow. Install Total In 15 Minutes!
- ［Note］: ① To Allow The Sender Not Hit The Bottom Of The Tank, The Length Of Sender Should Be 1" Less Than The Depth Of The Tank. ②The Diameter of Float is 1.38"(35mm). If You Have to Drill the hole, Diameter 1-1/2"(38mm) Hole Would be Perfect.③100TECH Sender is with Non-Linear Output, It can only match with standard gauge with Non-Linear Signal.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Operation Mode | automatic |
| Current Rating | 33 Amps |
| Operating Voltage | 12 Volts (DC) |
| Contact Type | Normally Open |
| Connector Type | Screws |
| Brand | 100TECH |
| Terminal | Quick Connect |
| Circuit Type | 1-way |
| Actuator Type | Reed Switch |
| Contact Material | Stainless Steel |
| International Protection Rating | IP67 |
| Upper Temperature Rating | 85 Degrees Fahrenheit |
| Controller Type | Push Button |
| Control Method | App |
| Connectivity Protocol | X-10 |
| Color | USAU395-45A291 |
| Unit Count | 1.0 Count |
| Number of Items | 1 |
| Manufacturer | 100TECH direct |
| UPC | 751501377688 |
| Item Weight | 12 ounces |
| Package Dimensions | 21 x 3 x 3 inches |
| Item model number | 20C5 |
| Manufacturer Part Number | 20C5 |

## Product Details

- **Operation Mode:** automatic
- **Current Rating:** 33 Amps
- **Operating Voltage:** 12 Volts (DC)
- **Contact Type:** Normally Open
- **Connector Type:** Screws
- **Brand:** 100TECH
- **Terminal:** Quick Connect
- **Circuit Type:** 1-way
- **Actuator Type:** Reed Switch
- **Contact Material:** Stainless Steel

## Images

![100Tech20"(510mm) Marine Fuel Sending Unit Float Replacement for Boat Vehicle RV Fuel Sender Gas Tank Sending Unit Diesel Level Sending Unit Water Level Sensor Fuel Gauge Sending Unit 240-33 ohm - Image 1](https://m.media-amazon.com/images/I/51vZF89ZMQS.jpg)
![100Tech20"(510mm) Marine Fuel Sending Unit Float Replacement for Boat Vehicle RV Fuel Sender Gas Tank Sending Unit Diesel Level Sending Unit Water Level Sensor Fuel Gauge Sending Unit 240-33 ohm - Image 2](https://m.media-amazon.com/images/I/61uL5++-7YL.jpg)
![100Tech20"(510mm) Marine Fuel Sending Unit Float Replacement for Boat Vehicle RV Fuel Sender Gas Tank Sending Unit Diesel Level Sending Unit Water Level Sensor Fuel Gauge Sending Unit 240-33 ohm - Image 3](https://m.media-amazon.com/images/I/41r-WEx1giL.jpg)
![100Tech20"(510mm) Marine Fuel Sending Unit Float Replacement for Boat Vehicle RV Fuel Sender Gas Tank Sending Unit Diesel Level Sending Unit Water Level Sensor Fuel Gauge Sending Unit 240-33 ohm - Image 4](https://m.media-amazon.com/images/I/61KFrM5vW+L.jpg)
![100Tech20"(510mm) Marine Fuel Sending Unit Float Replacement for Boat Vehicle RV Fuel Sender Gas Tank Sending Unit Diesel Level Sending Unit Water Level Sensor Fuel Gauge Sending Unit 240-33 ohm - Image 5](https://m.media-amazon.com/images/I/81WCrsAXOLL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐ 







  
  
    Almost perfect!
  

*by J***E on Reviewed in the United States on 6 May 2023*

Easy to install if you have access to your fuel sensor.  Mine are under my seats through an access panel. It’s was a pain getting to the bolts. But this was no fault of this product. But the bolts that came with this were to big and did not fit the threads. So I simply used the old bolts. All good. Gas reading on gauge went up to about half when before I was reading empty or maybe 1/8 of tank. So this definitely seems to be the fix. FYI, read the directions this has the 5 hole design and it only fits one way. Just turn the sensor until the holes line up

### ⭐⭐⭐ 







  
  
    Didn’t work for my needs
  

*by R***S on Reviewed in the United States on 29 August 2023*

The boat sending unit looks good and appears solid.On my gauge, it read backwards.  With the float in the full position, the gauge read near empty.  As the float dropped (as I was testing it) the fuel gauge rose.My only criticism is the lack of nuts for the screws.  You either have to supply your own, or the tank has to be thick enough to tap the tank.I missed the return window as I was gathering parts for an overhaul, only to find that it wouldn’t work for me.As a bit of caution, make sure you know the resistance range (empty to full) required by your gauge set.

### ⭐⭐⭐⭐⭐ 







  
  
    Accurate and supper easy to use.
  

*by C***E on Reviewed in the United States on 7 November 2023*

Good quality, easy to install and accurate.

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**Shop now:** [https://www.desertcart.com.br/products/527070577-100tech20-510mm-marine-fuel-sending-unit-float-replacement-for-boat](https://www.desertcart.com.br/products/527070577-100tech20-510mm-marine-fuel-sending-unit-float-replacement-for-boat)

---

*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-02-16*