Defender Home Page
Phone: 800-628-8225 Fax: 800-654-1616 Int'l.: 860-701-3400 Email: Contact Us
follow me on facebook
Shipping Info
no sales tax Defender Home Page
Your Cart

View Cart View Shopping Cart
Check My Order(s)
Track My Package(s)
Conversion Chart
Shopping Areas
Boats & Motors
 Defender Seal
Gobius Tank Monitor System - Waste Water

Gobius Tank Monitor System - Waste Water

  • Applications: Black and Gray Water Tanks, Power: 12/24 Volt DC
  • Select Number of Indicators
  • Mount: External Wall of Tank
  • Item #: 
    Model #: 
    Multiple Models Available
    Our Price:
    From: $234.99  To: $354.99
    234.99 354.99
    Please enter quantity below.
    Number of Sensors
    Status Indicators
    Model #
    Shipping Weight
      Gobius 1 Single Tank Monitor System - Waste Water
    3/4 FULL
      1.50 Lbs.
      *In Stock!*
    Our Price: $234.99
      Gobius 4 Single Tank Monitor System - Waste Water
    Empty, 1/4, 1/2 and 3/4 Full
      2.00 Lbs.
      *In Stock!*
    Our Price: $354.99
    Click the "More Info" button above for specific information about that product.


    • Applications: Black and gray waste tanks
    • Sensors are attached to the outside of the tank
    • Signals when the tank is 3/4-full and the toilet can't be used until the tank is empty again
    • Measures from the outside, nothing on the inside of the tank
    • Designed to work with metal or plastic tanks
    • Unique sensor technology (Not ultrasonic)
      • GST is different from ultrasonic sensors in two distinct aspects
        • The sound/vibration frequency range is in the audible spectra and the method is designed to measure and monitor the local mechanical impedance of a tank wall, not transmitting/ receiving pulses as ultrasonic techniques do
    • No sender inside the tank to clog
    • No holes to drill in the tank
    • Options for single or multiple sensors
    • NMEA 2000 compatible with 4-20mA adaptor
    • Fully Automatic with range of sensing options
    • Configurable output for gauge impedance
    • Configurable Sensing period range 10s - 10 min


    • Light Indicator
    • Outputs:
      • Analogue Output (10-180Ω, 240Ω-33Ω, 4-20mA)
      • Output for light or buzzer (both full and empty)
    • Wall Thickness Range:
      • Stainless Steel: 1/32" - 3/32"
      • Aluminum: 1/16" – 3/16"
      • Polyethylene: 1/8" – 1/2"
      • Fiber Glass: 1/8" – 5/16"
    • Supply Voltage 10 - 29 Volt DC
    • Current (Idle) 40 mA
    • Current (Operation) 200 mA
    • Lamp/Buzzer Output: 29 Volt DC max, 200 mA

    For Installation Instructions see Gobius-1 Waste Holding Tank Guide here

    For Installation Instructions see Gobius-4 Waste Holding Tank Guide here

    WARNING: This product MAY expose you to chemicals, which are known to the State of California to cause cancer, birth defects and/or other reproductive harm. For more information go to

    Gobius Tank Monitor System - Fresh Water / Fuel
    Item #: 503654
  • Applications: Fresh Water and Fuel Tanks, Power: 12/24 Volt DC
  • Select Number of Indicators
  • Mount: External Wall of Tank
    From: $234.99
    To: $354.99
    Model #:
    Multiple Models Available

    Have A Suggestion?

    Help us make our site better for everyone! Let us know you've found something wrong or frustrating on this page and we will improve it. Please mark each that apply.

    Product has been improperly categorized
    Page loads too slowly
    Product information is incorrect
    Page has errors or bugs
    Site is frustrating or difficult to use
    Product image is missing or wrong
    Cannot find my size
    Spelling errors on page
    Not enough product information

    Comments or Examples:
    Examples: Missing information such as dimensions and model number, typos, inaccuracies, etc...

    Please include your e-mail address below if you would like us to respond to your comments or questions.             

    Join Our Email List And Receive our Monthly Promotions
    Defender Email Specials
    Click Here For Our Privacy Policy