Could this be tapped into an existing monitor system to act as a secondary monitor panel?

If you use the same sensors it will give you the same reading. If a sensor goes out, both systems will give you a false reading. If you want a secondary monitor get 4 more sensors then you would have a good secondary system.

all tanks are showing whatever the fresh water tank is reading. Might replacing this monitor fix that problem?

All is reading if there is problem for frish cheack sensore

Im confused. Does this come with the sensors to put onto/ into the tank? Or do i have to buy those separate?

It does not come with the sensors. It has the standard hook-ups that snap onto the sensor ends. My tank came with the sensors in it.

what sensors work best with this ?

Kib manufacturers the sensor packs. The probes aren’t super important.

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💡 Stay ahead of your tank game with smart, stylish monitoring!

SLEEK DURABLE DESIGN - Choose white or black to perfectly complement your interior style.
ALL IN ONE TANK INSIGHT - Track fresh, gray, and black tank levels with a glance.
INTUITIVE LIGHT DISPLAY - Easy-to-understand indicator lights keep you informed without guesswork.
SEAMLESS 12 V INTEGRATION - Plug into your existing 12V system for instant monitoring power.
BATTERY HEALTH AT A GLANCE - Stay charged with real-time battery voltage readouts.

The RecPro Tank Sensor Monitor Panel M21 is a compact, durable 12V system panel that monitors fresh, gray, and black water tank levels plus battery voltage. Featuring an intuitive light-based display and controls for water pumps and heaters, it fits seamlessly into your RV or marine setup with a sleek white or black faceplate.

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Manufacturer	RecPro
Brand	RecPro
Package Dimensions	16.69 x 11.71 x 6.2 cm; 159 g
Item model number	RP-M21
Manufacturer Part Number	RP-M21
Colour	White
Special Features	durable
Voltage	12 Volts
Manufacturer	RecPro
Country of Origin	China
Item Weight	159 g

Tank Sensor Monitor Panel M21 | KIB Replacement | Panel Only | Level Sensor | Fresh Water or Holding Tank Level Sensor (White)

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