Probes, Sensors & Modules

Probes, sensors, and switches are the foundation of accurate monitoring and automation in saltwater aquariums. From pH and salinity probes to temperature sensors and float switches, these devices connect to your aquarium controller to deliver precise data and reliable control. Keeping track of your reef’s parameters with dependable probes ensures stability, healthier corals, and peace of mind.
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42 Items

  1. Single Junction Lab Grade pH Probe
    Bulk Reef Supply
    Single Junction Lab Grade pH Probe
    $49.99 $49.99

  2. Lab Grade Double Junction pH Probe
    Neptune Systems
    Lab Grade Double Junction pH Probe
    $119.99 $119.99

  3. Lab Grade Double Junction ORP Probe
    Neptune Systems
    Lab Grade Double Junction ORP Probe
    $129.99 $129.99

  4. Temperature Probe
    Neptune Systems
    Temperature Probe
    $49.99 $49.99

  5. Lab Grade Conductivity/Salinity Probe
    Neptune Systems
    Lab Grade Conductivity/Salinity Probe
    $249.99 $249.99

  6. LD-2 Solid Surface Leak Detection Probe
    Neptune Systems
    LD-2 Solid Surface Leak Detection Probe
    $49.99 $49.99

  7. LD-1 Low Profile Leak Detection Probe
    Neptune Systems
    LD-1 Low Profile Leak Detection Probe
    $49.99 $49.99

  8. OS-1 Optical Level Sensor V2
    Neptune Systems
    OS-1 Optical Level Sensor V2
    $39.99 $39.99

  9. I/O Breakout Box
    Neptune Systems
    I/O Breakout Box
    $59.99 $59.99

  10. Float Switch - Vertical Mount
    Bulk Reef Supply
    Float Switch - Vertical Mount
    $10.99 $10.99

  11. Float Switch - Horizontal Mount
    Bulk Reef Supply
    Float Switch - Horizontal Mount
    $15.99 $15.99

  12. Float Switch Kit for Dosing Container
    Simplicity
    Float Switch Kit for Dosing Container
    $12.95 $12.95

  13. Float Switch Kit for Dosing Container (3-Pack)
    Simplicity
    Float Switch Kit for Dosing Container (3-Pack)
    $34.95 $34.95

  14. Replacement Probe for Aquarium Temperature Controllers
    Ink Bird
    Replacement Probe for Aquarium Temperature Controllers
    $8.99 $8.99

  15. 2
    Neptune Systems
    2" Flow Sensor FS200
    $139.99 $139.99

  16. 1
    Neptune Systems
    1" Flow Sensor FS100
    $79.99 $79.99

  17. 1/2
    Neptune Systems
    1/2" Flow Sensor FS50
    $49.99 $49.99

  18. 1/4
    Neptune Systems
    1/4" Flow Sensor FS25
    $29.99 $29.99

  19. Lab Grade Dissolved Oxygen Probe
    Neptune Systems
    Lab Grade Dissolved Oxygen Probe
    $899.99 $899.99

  20. Reef Factory Salinity guardian Probe
    Reef Factory
    Reef Factory Salinity guardian Probe
    $180.49 $180.49

  21. Reef Factory pH Probe
    Reef Factory
    Reef Factory pH Probe
    $113.99 $113.99

  22. Alkatronic Replacement pH Probe
    Focustronic
    Alkatronic Replacement pH Probe
    $89.99 $89.99

  23. PINPOINT pH Replacement Probe Inc.
    American Marine
    PINPOINT pH Replacement Probe Inc.
    $49.99 $49.99

  24. Solid Surface Advanced Leak Detection Probe
    Neptune Systems
    Solid Surface Advanced Leak Detection Probe
    $39.99 $39.99

  25. Low-Profile Advanced Leak Detection Probe
    Neptune Systems
    Low-Profile Advanced Leak Detection Probe
    $39.99 $39.99

  26. Level sensor
    Reef Factory
    Level sensor
    $67.99 $67.99

  27. Apex Display Module
    Neptune Systems
    Apex Display Module
    $141.99 $141.99

  28. VDM LED & Pumps Control Module
    Neptune Systems
    VDM LED & Pumps Control Module
    $129.99 $129.99

  29. PM1 pH/ORP Probe Module
    Neptune Systems
    PM1 pH/ORP Probe Module
    $119.99 $119.99

  30. PM2 Salinity Module
    Neptune Systems
    PM2 Salinity Module
    $119.99 $119.99

  31. PM3 Dissolved Oxygen Module
    Neptune Systems
    PM3 Dissolved Oxygen Module
    $129.99 $129.99

  32. 1LINK Power and Communication Module w/ Power Supply
    Neptune Systems
    1LINK Power and Communication Module w/ Power Supply
    $199.99 $199.99

  33. LSM Lunar Simulator Module
    Neptune Systems
    LSM Lunar Simulator Module
    $89.99 $89.99