Fresh water level

[db30]

Hi just a quick one , I have a hymer e690 1995, fresh water gauge only goes to 50% even though tank is full , would any one have similar gauge as in pic , I want to copy the wire colour setup on the side of the tank to make sure mine is wired correctly

 

[bigwood]

I am not sure how the water level works on you’re Hymer but the sensors on our Autosleeper fur up very quickly even though we clean the tank regularly. The gauge reads half like yours even with a full tank.
We now work on managing two or three days between fills from our 60 litre tank rather than trusting the gauge.

 

[pwilmo]

Mopeka Water Sensors are very accurate and the sensors are compatible with the Mopeka Tank app.

fitted to the bottom of the water tank, no drilling.

 

[Jimbohorlicks]

Most tank gauges are in accurate. On some you can sort of recalibrate by taking off the dial and adjusting a screw on the back. Best to fill up first and then alter the gauge to read full.,.and then check it again when you are low.

 

[pwilmo]

Mopeka water sensors are very accurate, they rely on ultrasound measurement

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[Jimbohorlicks]

I was referring to the mh tank sensors that the OP has not the mopeka ones

Mopeka water sensors are very accurate, they rely on ultrasound measurement

 

[tonyidle]

Hymer use the 5 rods sensor. The rods get furry and occasionally the epoxy filled holder at the top suffers water ingress. The "gauge" isn't adjustable.

 

[pwilmo]

Jimbohorlicks
No offence taken, matey, but thanks for your polite gesture.
I knew what you meant CHEERS

 

[the1andonly]

my CBE water level system is pointless. I use float switches in the tank with simple LEDs visible in the shed next to the filler point

 

[autorouter]

Hymer use the 5 rods sensor. The rods get furry and occasionally the epoxy filled holder at the top suffers water ingress. The "gauge" isn't adjustable.

This sensor is often built into a screw cap on top of the tank. and can be easily removed and cleaned if necessary. It is simply a resistive sensor. One rod is always in the water. As the water level reaches the next rod, the resistance between the two rods drops, and the chip registers 25%. When the water reaches the next rod, it registers 50%, and so on.

The rods need to be clean to allow the (tiny) current to flow. Also the cap area needs to be clean to prevent any current paths through dirt etc, which can also give false readings.

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