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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RV Tank Sensor Monitor Panel M21 Panel Only (Black) | 12V Battery Level, Built-in Water Pump Control Switch, Simple Push Button Readout, Made in USA

Product ID: 187076133

Details

Brand
RecPro
Item Weight
0.14 kg
Item dimensions L x W x H
0.5 x 2.88 x
Material
High-Density
Style
Modern

💧Monitors fresh, gray & black tanks

📏Compact 0.5 x 2.88 x 4.63 in size

🔋12V system compatibility

$63.30

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Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚐 Stay ahead on the road with real-time tank insights!

SLEEK MODERN DESIGN - Available in black or white to perfectly complement your RV interior
SEAMLESS 12 V INTEGRATION - Effortlessly connects to your RV’s power system for reliable monitoring
BUILT IN WATER PUMP CONTROL - Control your water pump directly from the panel for ultimate convenience
INSTANT TANK STATUS AT A GLANCE - Intuitive LED display keeps you informed without guesswork
MADE IN THE USA WITH DURABILITY - High-density plastic construction built to last on every adventure

The RecPro RV Tank Sensor Monitor Panel M21 (Black) is a compact, surface-mount digital monitor designed to track your RV’s fresh, gray, and black water tank levels plus battery voltage. Operating on a 12V DC system, it features a simple push-button LED readout and built-in water pump control, all housed in durable high-density plastic. Made in the USA, this sleek panel blends functionality with style to keep your RV running smoothly.

Specifications

ASIN	B07XZJT5MJ
Best Sellers Rank	#174,034 in Automotive ( See Top 100 in Automotive ) #129 in RV Water Pumps & Accessories
Brand Name	RecPro
Customer Reviews	4.4 4.4 out of 5 stars (294)
Item Dimensions	0.5 x 2.88 x 4.63 inches
Item Weight	0.14 kg
Manufacturer	RecPro
Material Type	High-Density Plastic
Maximum Supply Voltage	12 volts_of_direct_current
Measurement Accuracy	High
Measuring Range	6.00 - 12.85 volts_of_direct_current
Model	RP-M21
Mounting Type	Surface Mount
Number of Items	1
Number of Packs	1
Output Type	Digital
Part Number	RP-M21
Style Name	Modern
UPC	193652017509
Unit Count	1 Count
Upper Temperature Rating	60 °C

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