Gauge Components & Senders

  1. Moeller Reed Switch Tank Sending Unit

    $74.99 - $143.99
    1
  2. Raritan Ruddermaster Panoramic Rudder Angle Indicator Kit

    $569.99 - $677.99
  3. Moeller Electric Fuel Level Sending Unit - 035722-10

    $32.99
    0
  4. Faria Electrical Oil Pressure Sender - 90512

    $45.99
    1
  5. Moeller Electric Fuel Gauge Swingarm Sending Unit Kit - 035726-10

    $66.99
    0
  6. Faria Water Temperature Sender

    $16.16 - $35.99
    0
  7. Blue Sea Systems VSM 422 Vessel Systems Monitor Tank Sender

    $112.99 - $113.99
  8. Moeller Electric Sending Unit with Return - 035724-10

    $49.99
    0
  9. SeaStar Teleflex Oil Pressure Sender - 18-5899

    $35.99
    0
  10. Faria Electrical Oil Pressure Sender - 90519

    $52.99
    0
  11. SeaStar Teleflex/Sierra Universal Fuel Sender - 90424P

    $43.99
    0
  12. SCAD Technologies Adapter Plate - 10029

    $40.99
    0
  13. SeaStar Teleflex/Sierra Oil Pressure Sender - OP24891

    $34.99
    0
  14. SeaStar Teleflex/Sierra Water Temperature Sending Unit - TS26621

    $17.90
    0
  15. Faria Single Fuel Level Sender - 91001

    $73.99
  16. Sierra Fuel Sender Gasket 5-Hole Unit - 64082

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

    $11.20
    0
  18. Faria Universal Pitot Kit - 91106

    $37.99
    0
  19. Raritan Ruddermaster Rudder Angle Indicator Kit

    $640.99 - $734.99
  20. Faria 1/8" American Dual Station Oil Pressure Sender - 90511

    $58.99
  21. Faria 1/8" Dual Station Temperature Sender - 90406

    $24.99
  22. Faria Cylinder Head Temperature Sender - 90405

    $26.99
  23. Raritan Ruddermaster Rudder Angle Indicator Meter

    $274.99 - $426.99
  24. Arco OEM Repalcement Outboard Motor Ignition Sender - IG001

    $64.99
    0
  25. Arco OEM Repalcement Trim Sender - TS001

    $75.99
    0
  26. 10% off

    VDO Marine Viewline Bezel

    $4.00
    $3.60
    0
  27. Faria European 5 Bar Oil Pressure Sender - Single Float - 90516

    $68.99
  28. Faria Single Station Rudder Angle Sender - 90530

    $438.99
  29. Faria 1/8" American Single Standard Temperature Sender - TS1029

    $17.78
  30. Faria 1/8" European Single Standard Temperature Sender - 90412

    $24.99
  31. Faria Depth Gauge Air Temperature Sender - TS0101

    $42.99
  32. Raritan RudderMaster Calibration Box - MKCB

    $152.99
  33. Raritan RudderMaster Potentiometer - MKCBP

    $51.99
  34. Raritan Ruddermaster Actuator Rod Assembly - MKDRW

    $43.99
  35. Raritan Ruddermaster Sender Lever - MKSL

    $35.99
  36. Raritan Ruddermaster Sender Potentiometer - MKSP

    $43.99
  37. Raritan Ruddermaster Panoramic Rudder Angle Indicator Meter

    $193.99 - $278.99
  38. Raritan Ruddermaster Rudder Angle Indicator Repeater

    $301.99 - $369.99
  39. Raritan Ruddermaster Panoramic Rudder Angle Indicator Repeater

    $245.99 - $324.99
  40. Raritan Ruddermaster Sender Assembly

    $267.99 - $358.99

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.