RUPSE Fuel Sender Unit for Boat, Truck & RV — 6" (150mm) Stainless Steel, IP67 Waterproof

RUPSE 6" (150mm) stainless steel fuel sender unit is a corrosion-resistant tank sender and matching gauge that measures fuel and water levels accurately for boats, trucks, RVs and industrial tanks.

This compact sender combines a durable stainless-steel housing with reed-switch electronics to deliver reliable level readings in gasoline, diesel, water and mixed liquids. Designed for marine and mobile use, the unit resists corrosion and moisture, pairs with an 8-color backlit, IP67 waterproof gauge and installs using a standard SAE 5-hole pattern and included hardware. The 6" (150mm) length fits many shallow to mid-depth tanks; other sizes are available for larger installations.

How precise and durable is the RUPSE sender for marine environments?

The sender uses reed-switch technology inside a stainless-steel body for stable, repeatable output and long service life. Its materials and sealing resist corrosion and fuel exposure, reducing maintenance and replacement frequency in salty or wet conditions.

• Stainless-steel exterior resists rust and electrochemical corrosion.
• High-quality reed switches provide accurate, stable signals.
• Compatible with gasoline, diesel, water and methanol blends.
• Sealed construction reduces moisture intrusion and failure risk.

What does the RUPSE gauge display and how easy is it to read at a glance?

The matching gauge shows Empty–1/2–Full at a glance with anti-fog curved glass and a stainless frame for glare reduction. It offers eight adjustable backlight colors so you can match cockpit or dash lighting and maintain legibility day or night.

• 8 adjustable backlight colors for visibility and aesthetics.
• Anti-fog curved glass keeps the readout clear in damp conditions.
• IP67 waterproof rating protects electronics from spray and rain.
• Clear Empty/½/Full markings simplify quick checks underway.

How straightforward is installation and what hardware is included?

Installation follows a standard SAE 5-hole mounting pattern and includes an NBR gasket plus M5 screws, simplifying retrofit into existing tanks. Ten quick wiring terminals and a wiring diagram are provided so you can hook the sender to the gauge or to most common fuel gauge systems without specialized tools.

• SAE 5-hole mounting pattern fits common tank flanges.
• NBR gasket for reliable sealing and high oil resistance.
• M5 screws and 10 quick wiring terminals included for fast setup.
• Wiring diagram provided for correct electrical connections.

Which tank sizes and vehicle types is the 6" (150mm) sender best suited for?

The 6" (150mm) length is ideal for shallow-to-mid-depth tanks found on many boats, small RVs, ATVs and service vehicles. RUPSE offers multiple lengths to match deeper tanks on larger vessels and trucks, so you can choose the right size for accurate readings across applications.

• 6" (150mm) fits shallow and mid-depth tanks on smaller craft and vehicles.
• Available in other lengths for yachts, trucks and industrial tanks.
• Works with marine, automotive, RV, agricultural and industrial equipment.
• Selectable sizes prevent false empty or full readings from wrong fit.

Who is this for: The RUPSE 6" stainless steel fuel sender unit and compatible gauge are aimed at boat owners, marine technicians, RV enthusiasts and fleet managers who need a corrosion-resistant, easy-to-install level sensor with clear, backlit readout. Choose this sender when you want a straightforward upgrade or replacement that works with gasoline, diesel and water, provides stable reed-switch accuracy and fits common SAE mounting patterns. If your tank is deeper than mid-depth, check RUPSE multi-size options to match your application.