Gauge Components & Senders

  1. 10% off

    VDO Marine Viewline Bezel

    $4.00 - $10.00
    $3.60 - $9.00
    0
  2. Sierra Fuel Sender Gasket 5-Hole Unit - 64082

    $6.79
    0
  3. SeaStar Teleflex/Sierra Sportsmen Series Universal Pitot Tube - 56973P

    $11.20
    0
  4. Faria Water Temperature Sender

    $16.16 - $35.99
    0
  5. Faria 1/8" American Single Standard Temperature Sender - TS1029

    $17.78
  6. SeaStar Teleflex/Sierra Water Temperature Sending Unit - TS26621

    $17.90
    0
  7. Faria 1/8" European Single Standard Temperature Sender - 90412

    $24.99
  8. Faria 1/8" Dual Station Temperature Sender - 90406

    $24.99
  9. Faria Cylinder Head Temperature Sender - 90405

    $26.99
  10. Moeller Electric Fuel Level Sending Unit - 035722-10

    $32.99
    0
  11. Faria Universal Pitot Kit - 91106

    $34.99
    0
  12. SeaStar Teleflex/Sierra Oil Pressure Sender - OP24891

    $34.99
    0
  13. Faria Depth Gauge Air Temperature Sender - TS0101

    $35.99
  14. SeaStar Teleflex Oil Pressure Sender - 18-5899

    $35.99
    0
  15. SCAD Technologies Adapter Plate - 10029

    $40.99
    0
  16. SeaStar Teleflex/Sierra Universal Fuel Sender - 90424P

    $43.99
    0
  17. Faria Electrical Oil Pressure Sender - 90512

    $45.99
    1
  18. Moeller Electric Sending Unit with Return - 035724-10

    $49.99
    0
  19. Faria Electrical Oil Pressure Sender - 90519

    $52.99
    0
  20. Faria 1/8" American Dual Station Oil Pressure Sender - 90511

    $58.99
  21. VDO Marine Oil Pressure Sender - 360-410

    $59.99
    0
  22. VDO Marine Pressure Sender - 362-004

    $64.99
    0
  23. Arco OEM Repalcement Outboard Motor Ignition Sender - IG001

    $64.99
    0
  24. Moeller Electric Fuel Gauge Swingarm Sending Unit Kit - 035726-10

    $66.99
    0
  25. Faria European 5 Bar Oil Pressure Sender - Single Float - 90516

    $68.99
  26. Faria Single Fuel Level Sender - 91001

    $73.99
  27. Moeller Reed Switch Tank Sending Unit

    $74.99 - $143.99
    1
  28. Arco OEM Repalcement Trim Sender - TS001

    $81.99
    0
  29. Blue Sea Systems Gasoline Tank Level Sender - 1811

    $123.99
    0
  30. Faria Single Station Rudder Angle Sender - 90530

    $438.99
  31. Raritan Ruddermaster MK6 Rudder Angle Indicator Kit

    $569.99
    0
  32. Raritan Ruddermaster Rudder Angle Indicator Kit

    $640.99 - $734.99
  33. Raritan Ruddermaster MK5 Rudder Angle Indicator Kit

    $650.99
    0

About Gauge Components & Senders

Marine Senders

Boat sending units are designed to measure the amount of fluid in a tank, boat speed, temperature, and a variety of pressure-sensitive gauges. Senders can be replaced with parts from Defender Marine or full sender kits are also available for a variety of applications.

What is a Marine Sender?

Marine senders, or boat sending units, are designed as a simple measuring device that then relays (or sends) this measurement to a marine gauge.

How do you test a marine fuel sender?

Fuel senders can easily be tested with an ohms tester. A variety of fuel senders are available including level arm, swing arm and solid float, and conventional style float switch type senders; all can be tested by reading the ohms output.

Floatless marine senders measure for many different gauges.

Pitot kits measure a boat's speed while more technological speed sending units rely on GPS to garner a constant speed reading. Temperature sending units from Defender Marine measure up to 300 degrees and relay this back to temperature gauges in many applications. Pressure sensors measure essential pressures such as oil pressure in the engine. Newly designed floatless senders measure tank pressure versus fluid capacity.