The Wema TN Level sending unit with suction and return ports is a versatile fuel level sensing device primarily utilized in trucks and buses, but its applications extend to a wide range of other vehicles and machinery. This sending unit is designed to provide accurate fuel level measurements while incorporating essential fuel management features.

The TN sending unit is a comprehensive fuel level monitoring solution that integrates suction and return pipes for fuel circulation, an air vent to prevent pressure buildup, and an optional filter for the suction line to ensure clean fuel delivery. This multi-functional design makes it an ideal choice for various fuel systems, particularly in heavy-duty vehicles, generators and industrial equipment.

Unlike the TX sending unit, which offers interchangeable suction and return ports, the TN sending unit is custom-made to order. This characteristic makes it particularly suitable for high-volume applications where specific suction and return feed configurations need to be incorporated into the sending unit. The customization allows for precise alignment with the fuel system requirements of different vehicle models and machinery types.

TN sending units are available in a range of custom sizes, starting from approximately 150mm. This flexibility in sizing ensures that the sending unit can be adapted to fit various tank depths and configurations, accommodating the diverse needs of different vehicle and equipment manufacturers.

The customization options extend beyond size to include the number and type of ports. For instance, if an application only requires a suction port without a return or air vent, this specification can be accommodated. Each TN sending unit is manufactured according to the customer's precise requirements, allowing for tailored solutions that match specific fuel system designs.

Due to the custom nature of the TN sending unit, there is typically a minimum order quantity unless a similar specification is currently in production. This approach ensures cost efficient manufacturing processes while still providing highly specialized products.

Given the numerous variations possible with the TN sending unit, it is recommended to contact us directly with your specific requirements. This ensures that the correct unit is supplied for each unique application, optimizing fuel system performance and compatibility.

The TN sending unit features a bolt-down head with a standard SAE-5-hole drill pattern, ensuring secure and standardized mounting in various vehicles and equipment. This industry-standard mounting configuration facilitates easy installation and replacement across different applications.

For replacement sending units, it's crucial to provide the Wema part number, which can be found stamped on the top of the sending unit. In cases where the part number is unclear, customers are encouraged to send a photo for accurate identification, ensuring the correct replacement is supplied.

To ensure proper installation and compatibility, refer to the SAE-5 hole drill pattern diagram. This standardized mounting configuration is widely used in the industry and ensures a secure fit for the Wema TN Level sending unit.

Torque settings: 2.5Nm – 3.0Nm

For new applications we need to know:

• Application (Diesel/Bio-fuel etc.)
• Length of sensor (and/or height of tank minus 10mm)
• Resistance value (Empty Ohm (i.e. 10) and Full Ohm (i.e.180) =>10-180 ohm)
• Fitting for suction – dimension and/or quick fit?
• Fitting for return – dimension and/or quick fit?
• Angle of suction & return pipes
• Air vent required?
• Fuel filter required?
• Alarm required?
• Electronic connector (i.e. DIN 2-4 pin or other)

For a comprehensive overview of different sending unit options and their features, consult the sending unit comparison chart. This chart provides valuable information to help you select the most appropriate sending unit for your specific application, comparing the Wema TN Level sending unit with other models in the product line.