OXCANO 240-33 ohms 7"(180mm) Fuel Sending Unit Marine Tank Sender, Doughnut Float, Reed-Switch

The OXCANO 7" (180mm) fuel sending unit is a marine-grade tank sender that reports fuel level as a 240–33 ohm signal and installs quickly for reliable boat fuel monitoring.

Designed for marine and off-road environments, this OXCANO sender converts float position into a standard 240–33 ohm output compatible with most gauges and monitoring systems. Its compact 7-inch (180 mm) length and doughnut-style float reduce moving-part wear, while a wide operating temperature range and straightforward mounting make it practical for boats, generators, and a variety of vehicles.

How does the OXCANO sender measure fuel level?

The unit uses a rotating arm with a sealed doughnut float that activates reed switches to change electrical resistance as fuel level shifts. That resistance moves linearly between 240 ohms (empty) and 33 ohms (full), creating a simple, widely accepted output for analog and many digital gauges.

• 240–33 ohm output range for standard gauge compatibility
• Doughnut float with reed-switch operation reduces mechanical wear
• 10 mm resolution for responsive level updates

Is this sending unit suited for marine conditions and other heavy-duty uses?

Yes — the OXCANO sender was built to tolerate harsh environments. Materials and sealed switches protect operation across a broad temperature span, and the design avoids delicate linkages that commonly fail in wet, vibrating, or dirty conditions.

• Operates from -40°C to +85°C for cold and hot climates
• Sealed reed-switch assembly resists moisture and corrosion
• Works in boats, speedboats, generators, engines, and construction gear

How easy is installation and setup on my tank?

Installation is straightforward and typically takes about 15 minutes with basic tools. The sender mounts to the tank using the included instructions and fits common openings without special tank modification, making it a practical swap or upgrade.

• 7" (180 mm) length fits many standard tanks and openings
• Includes step-by-step installation guidance
• No tank alteration or complex calibration required

What performance and maintenance should I expect?

The reed-switch and doughnut float deliver consistent readings with minimal upkeep because there are fewer fragile moving parts. Routine checks of connections and occasional visual inspection of the float and arm will keep the sender reliable for years.

• Durable design offers longer service life versus fragile potentiometer senders
• Low-maintenance reed switch avoids frequent recalibration
• 10 mm resolution gives accurate, timely level changes on gauges

Who is this for: Boat owners, marine technicians, and operators of portable power equipment who need a rugged, easy-to-install fuel level sender that outputs a standard 240–33 ohm signal. It's also suitable for mechanics and DIYers upgrading older or unreliable senders in small boats, generators, agricultural machines, and modified vehicles where dependable fuel-level feedback is required.