Unusual tank sensor issues.

[Josh-az270]

2006 Attitude Toy hauler. JRV micro monitor. Twin 60 gallon fresh tanks. Fresh was full after 2 days tank reads 1/3. Then empty later in day. Still plenty water left. Connection hose clean and free of debris.
Wth?

Empty tanks at home and black reads 1/3 while empty. No biggie. So I pulled the leads on the 1/3 and 2/3 probes. Nothing touching and it reads 1/3. Wth. Ground 2/3 lead and its correct along with full lead.
Is it the monitor or maybe a skinned 1/3 wire grounding itself?

[enblethen]

Is there enough slack so you can re-solder the joint.
Try cleaning with brake clean. I f it is a crimp splice, you could try to crimp it again. Solder would be best option.

[Josh-az270]

enblethen wrote:
Use some Brake clean to remove corrosion, then spray with clear lacquer.

Not the ring terminals. The actual 4-1 wire resistor splice don't look good.

[enblethen]

Use some Brake clean to remove corrosion, then spray with clear lacquer.

[Josh-az270]

So after another look, the resistor pack looks corroded. Question, will the kib pigtail work with my Jrv micro monitor?

I know it will never stay perfect but I'm the kind of guy that likes for things to (just work) lol

[Pipeman]

Black tank, wait for it to start burping(air bubble, it's almost time to dump. Grey tank, I have 2, the bathroom tank fills fastest and I have been known to be standing in grey water while showering. Empty immediately. The kitchen grey tank takes longer to fill but I usually empty it when I dump the black tank, in tandem with the bathroom grey tank. It seems the gauge for our fresh water works great. When boondocking, we can usually last about 10 days without having to dump the black water.That's me having a navy shower every day. I have two water bladders, one is a 50 gallon and the other is 45 gallons. When the 5er is dropped I go and fill both of them and have water ready to go when needed. I use a RV pump to pump the water into my gravity fill port. My dually has an 8 ft box so both bladders can be used at the same time.

[enblethen]

I use a cup of two of cheap dishwasher liquid in black tank to reduce build up. Put it in after dumping and adding water. Cleans while moving down the road.
no need in grey tank as dish soap enters while doing the dishes.
OP disconnected some of the sensors and still has reading! that would mean not a sensor issue!

[mchero]

Lynnmor wrote:
It is the slime on the tank walls between the "nails" that creates the electrical path causing high readings. Any slime, crud or corrosion on the nails can only cause a lower reading.

I concur, it's the slime. What can be used to strip that slime. I was thinking one of those LARGE bottles of something like Cascade dishwashing soap.
I will have to dig up my bore scope and take a look at the inside of the gray tank. Luckily my commode is on top of the black tank so I can tell from the sound of the liquids falling down the hole. A visual to verify.

[enblethen]

I don't follow some saying it is your "sensors" when you have them disconnected.
Dis connect them all and see if you still have readings. Again disconnect at the monitor panel.
Fresh water may not have enough minerals in the water to make the sensors read the water.

[Josh-az270]

wa8yxm wrote:
Well. I'm sorry to tell you that is not "Unsuual" at all. In fact it's quite normal... The "Sensor" well closest thing to it is a nail or screw driven through the tank wall wire connected outside. I'm not kidding that's all it is. and if it's Moist/Wet it figures that tank is at least that full. Slime can do that.

I totally agree with the gray and black tanks. But the fresh don't really make sense.

[Dusty_R]

Check out SeeLevel tank monitor. Very accurate and gives readings in %.

Dusty

[Lynnmor]

It is the slime on the tank walls between the "nails" that creates the electrical path causing high readings. Any slime, crud or corrosion on the nails can only cause a lower reading.

[wa8yxm]

Well. I'm sorry to tell you that is not "Unsuual" at all. In fact it's quite normal... The "Sensor" well closest thing to it is a nail or screw driven through the tank wall wire connected outside. I'm not kidding that's all it is. and if it's Moist/Wet it figures that tank is at least that full. Slime can do that.

[BobsYourUncle]

Josh-az270 wrote:

I like you style, only issue is I'm always dry camping around 20-30 miles in on dirt. I'm dump the gray when needed but naww on the black. Lol worse part is the fresh tanks are black so I have no visual. Lol

Dry camping = be very conservative on usage. Navy shower, if you must shower. Minimal water to flush, wash dishes or yourself etc. Paper plates and disposable cutlery, stuff like that.

When I dry camp I carry 2 big extra water jugs to pour in to the fresh tank.
I can go a week dry camping, but I am extremely careful with water consumption. Showers really kill the water fast.

[enblethen]

The conductors could be corroded where they exist the cable sheath on either end. That is why you need to disconnect at the monitor panel to see whether it is in the cable or monitor.