EMIHO 8" (200mm) Fuel Level Sending Unit 240–33Ω SAE 5-Hole Stainless Steel IP67 — Marine/Auto Sender

The EMIHO 8" (200mm) 240–33 ohm fuel level sending unit is a stainless-steel SAE 5-hole sensor that reads liquid level for fuel or water tanks on boats, trucks and cars.

This compact sender is built from marine-grade SUS316 stainless steel with an NBR float and PVC components to resist vibration and corrosion. It outputs the American standard 240–33 ohm signal and is available in several lengths so you can match the probe to your tank depth. Rated IP67, it’s made to tolerate splash and brief immersion while providing a reliable analog signal to compatible gauges.

How do I choose the correct length for my tank?

Measure the usable depth of the tank and compare it to the available probe lengths. For plastic tanks, select a sender about 1" (25mm) shorter than the tank depth; for metal tanks, choose roughly 0.5" (12mm) shorter to allow clearance for mounting and float travel.

• Available probe lengths: 200mm (8"), 225mm (9"), 250mm (10"), 275mm (11").
• Resolution (step distance): 21mm for consistent level increments.
• Pick length so float moves freely without bottoming out or striking the cap.

Which systems and liquids is this sender compatible with?

The EMIHO sender is designed for liquids without suspended solids—commonly fuel and water—and works with standard automotive and marine analog gauges that accept a 240–33 ohm input. It’s suitable for boats, trucks, cars and stationary tanks used in marine or automotive contexts.

• Compatible liquids: gasoline, diesel, water, and similar clean fluids.
• Applications: marine boats, pickup trucks, cars, auxiliary water tanks.
• Mounting pattern: standard SAE 5-hole for simple retrofit or replacement.

What are the electrical and environmental specifications?

The sender follows the American 240–33 ohm resistance standard so it plugs directly into many legacy gauges and meters. It tolerates temperatures from -40°C to 85°C and has an IP67 rating for protection against dust and temporary immersion.

• Output: 240–33 ohm (American standard) analog resistance signal.
• Temperature range: -40°C to 85°C for broad environmental resilience.
• Ingress protection: IP67, dust-tight and protected against temporary immersion.

How easy is installation and what’s included?

Installation uses the standard SAE 5-hole pattern and comes with the hardware needed to fit most tanks. Wiring is straightforward: red-brown for positive and blue for negative; an NBR gasket and five M5 screws are included to seal the mounting flange.

• Included in box: level sensor, 2mm NBR gasket, five M5 screws, installation instructions.
• Wiring: red-brown positive, blue negative for direct gauge connection.
• Material details: SUS316 stainless steel body, NBR float, PVC components for durability.

Who is this for? The EMIHO 240–33Ω stainless-steel sender is aimed at boat owners, mechanics, fleet operators and DIY enthusiasts who need a durable, replaceable analog fuel or water level sensor. It’s a practical choice when you want a corrosion-resistant sender that fits standard SAE 5-hole mounts and interfaces with legacy gauges. If you need a different probe length, choose from the listed sizes so the float travel and gauge response match your tank geometry.