--- product_id: 527070577 title: "100TECH 20\"(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: "NT$5475" currency: TWD in_stock: true reviews_count: 2 category: "100 Tech" url: https://www.desertcart.tw/products/527070577-100tech-20-510mm-marine-fuel-sending-unit-float-replacement-boat store_origin: TW region: Taiwan --- # Precision 240-33 Ohm Output 15-Minute Easy Installation 316 Stainless Steel Durability 100TECH 20"(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:** NT$5475 **Availability:** ✅ In Stock ## Summary > ⛵ Upgrade Your Fuel Gauge Game — Precision Meets Durability on Every Wave! ## Quick Answers - **What is this?** 100TECH 20"(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?** NT$5475 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/527070577-100tech-20-510mm-marine-fuel-sending-unit-float-replacement-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 - • **Marine-Grade Durability:** Crafted from corrosion-resistant 316 stainless steel for unmatched longevity in harsh marine environments. - • **Hassle-Free Installation:** Comes complete with gasket, mounting screws, and clear instructions—get it installed in just 15 minutes. - • **Optimized for Rough Waters:** Direct replacement for swingarm senders reduces fuel level fluctuations even in choppy conditions. - • **No Moving Parts, No Failures:** Magnetic reed switch design eliminates mechanical wear, ensuring reliable performance over time. - • **Precision Fuel Level Accuracy:** Advanced reed switch technology delivers smooth, slosh-free readings with a 240-33 ohm non-linear output. ## Overview The 100TECH 20" Marine Fuel Sending Unit is a high-precision, corrosion-resistant fuel level sensor designed for boats, RVs, and diesel tanks. Featuring a magnetic reed switch with a 240-33 ohm output, it provides smooth, accurate readings without mechanical wear. Constructed from rugged 316 stainless steel, it ensures long-lasting marine-grade durability. Easy to install with all necessary hardware included, this unit dramatically reduces fuel slosh fluctuations and fits standard 5-hole mounting patterns for quick upgrades. ## Description 100TECH Reed Switch Fuel Sending Unit is Designed For the One Who Are looking for A Simple Solution To Measure The Amount of Fuel/Gasoline Level In The Tank. There are So many different Senders on desertcart, What’s The Features and Benefits of 100TECH’s Sending Units ? 1. 100TECH Fuel Sender is Made With OKI Reed Switch(Imported from Japan),More Reliable and Durable. 2. The Resolution of 100TECH 4”,5”,5.5”,6”,7”,7.5 Marine Fuel Sending Unit is 10mm. 3. The Rod, Cork Gasket and Mounting Screws of 100TECH Fuel Tank Sending Unit is Made From 316 Stainless Steel to Ensure Reliable Performance And Long Service Life. OThers: 1. The Resolution of Sender 4”,5”,5.5”,6”,7”,7.5 Is 21mm. Lack of Resolution,The Dropping To Empty Is Very Steep, The Tank Looks 1/4 Full When It Is About At 1/8. 2. The Body of Sender is Made with 304 Stainless Steel. 304 rusts Faster As It Has Less Nickel And No Molybdenum. Operational Temperature: -40°F ~ +85°F (-40°C ~ +85°C). Additional Information : Package Information: 1 x 100TECH Fuel Sender 1 x Gasket 5 x M5*0.8 Length(16mm) Screws 1x Sending Unit Installation GuideNote: Please kindly pay Attention to the Product Description, Especially the Resolution and Length (the Length of Sender Should be 1" less than the Depth of the Tank if tank is Plastic, and 0.5" Less Than the Depth of the Tank if Tank is Metal) Before Placing the Order. Review: Almost perfect! - 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 Review: Accurate and supper easy to use. - Good quality, easy to install and accurate. ## 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 | |---------------|-------| | ASIN | B0BY5F3NZC | | Brand | 100Tech | | Brand Name | 100Tech | | Customer Reviews | 4.8 out of 5 stars 10 Reviews | | Manufacturer | 100Tech | | Material | Nickel, Stainless Steel | | Material Type | Nickel,Stainless Steel | | Model | 20C5 | | Number of Items | 1 | | Part Number | 20C5 | | UPC | 751501377688 | | Unit Count | 1.0 Count | | Unit count | 1.0 Count | ## Product Details - **Connector type:** Screws - **Contact type:** Normally Open - **Current rating:** 33 Amps - **Operating voltage:** 12 Volts (DC) - **Operation mode:** ON-OFF" or "ON-NONE-OFF ## Images ![100TECH 20"(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) ![100TECH 20"(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) ![100TECH 20"(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) ![100TECH 20"(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) ![100TECH 20"(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) ## Customer Reviews ### ⭐⭐⭐⭐ Almost perfect! *by J***E 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 ### ⭐⭐⭐⭐⭐ Accurate and supper easy to use. *by C***E on 7 November 2023* Good quality, easy to install and accurate. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tw/products/527070577-100tech-20-510mm-marine-fuel-sending-unit-float-replacement-boat](https://www.desertcart.tw/products/527070577-100tech-20-510mm-marine-fuel-sending-unit-float-replacement-boat) --- *Product available on Desertcart Taiwan* *Store origin: TW* *Last updated: 2026-07-29*