In conjunction with using a 12v water tank gauge from RV Electronics, this water tank sender probe can be fixed to an under chassis low profile water tanks. There are 5 sensers that indicate 5 different levels of water, until it’s time to fill up. This DIY sender probe can be fixed to the side of any metal or plastic water tank with the special grommet included.  

Product Features: 

  • With one push of the test button, you can check the water level of up to three tanks  

  • Easy to fit 

  • Sender probe is sealed by a special grommet which is compressed in the hole when the nut is tightened 

  • Measures the water level by contact with the 5 sensors along the arm 

  • No moving parts 


  • Only requires one 22mm (7/8″) hole in the side of the tank 

  • Suits tanks from 100mm to 280mm (4″ to 11″) deep 

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