FRESH WATER TANK GAUGE - RETRO FIT

[CoronCoron]

My SD 290 has no fresh water tank gauge, so when it's out there is no warning.
Are there any gauges that can be installed as a retro fit?

 

[CaptRonn]

https://www.defender.com/search.html?q=water level gauge

https://www.defender.com/product.jsp?id=4039069

 

[Chris-380]

My SD 290 has no fresh water tank gauge, so when it's out there is no warning.
Are there any gauges that can be installed as a retro fit?

@speakrdude has the info on this