Replacing failed fresh water tank displays are becoming an issue (availability is waning); what I did here is another option you may want to consider.
My boat took a significant lightning strike and pretty much wiped out anything electronic earlier last year. The strike also took out the fresh water tank liquid level indicator and probably the sender; replacements are difficult to find. What I did is extend my NMEA 2000 network to the salon power panel and to the water tank then added a Maretron TLM100 ultrasonic transmitter to the tank and Maretron DSM410 display on the power panel. The only hole I cut was in the water tank; For the display, I fabricated a mounting bracket that anchored to the water level switch hole (removed the switch), the NMEA 2000 cable to the display also went through that switch hole. The panel can be returned to OEM without a scratch; but, who would want to. The great thing is the display can be toggled to many user configurable screens and view anything on the network. A couple of pics below showing the installation on the water tank, display pages of tank percentage level as well as total and remaining water in gallons, depth and temperature of water below boat, generator voltage, frequency, temperature, and oil pressure, and the SR systems monitor data I added to the network a couple of years ago. To install everything probably took three hours and another hour to program it.
My boat took a significant lightning strike and pretty much wiped out anything electronic earlier last year. The strike also took out the fresh water tank liquid level indicator and probably the sender; replacements are difficult to find. What I did is extend my NMEA 2000 network to the salon power panel and to the water tank then added a Maretron TLM100 ultrasonic transmitter to the tank and Maretron DSM410 display on the power panel. The only hole I cut was in the water tank; For the display, I fabricated a mounting bracket that anchored to the water level switch hole (removed the switch), the NMEA 2000 cable to the display also went through that switch hole. The panel can be returned to OEM without a scratch; but, who would want to. The great thing is the display can be toggled to many user configurable screens and view anything on the network. A couple of pics below showing the installation on the water tank, display pages of tank percentage level as well as total and remaining water in gallons, depth and temperature of water below boat, generator voltage, frequency, temperature, and oil pressure, and the SR systems monitor data I added to the network a couple of years ago. To install everything probably took three hours and another hour to program it.
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