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Philippi tank monitor (and sensors)

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Sportswagoneer View Drop Down
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Joined: 17 June 2018
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Sportswagoneer Quote  Post ReplyReply Direct Link To This Post Posted: 18 January 2021 at 06:52
Hi Harold.

In my Hanse 400 2010, I measured the depth of the tanks at the sensor location and ordered as follows:

Water tank (S3 screw fit): 33cm. Ordered a 300 (30cm) sensor.
Diesel tank (S5 5 bolt): 24cm. Ordered a 200 (20cm) sensor.
I ordered both in European scale (0-190 Ohms) and in “High resolution”. (Really not sure how important the resolution is - but I figured that the tanks were rather shallow - so I might as well.)

They’re working fine with the Cerbo - and as of the last software version you can add specific measurement values to compensate for the tank shape.

Best of luck!


Edited by Sportswagoneer - 18 January 2021 at 06:56
2010 Hanse 400 #700 “Neste Sommer”
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DJgun View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DJgun Quote  Post ReplyReply Direct Link To This Post Posted: 08 April 2021 at 03:02
The tank shape is quite "interesting" to say the least. Hanse and the tank manufacturer have gone to a bit of effort to maximise volume in the space they allocated.

The shape is a little bit like a triangular prism when viewed from the side, I.e. looking from centreline of hull to the tank face.the result of this shape is that by the time the fuel is down to say 75mm deep there is less than 10 litres of fuel in the tank, and you should not be trying to run with less.

The photos of gauge earlier in this post show the non-linearity of fuel level.
Certainly a floating arm will give very  poor resistance- fuel remaining relationship. Linear float sensors will be better but not linear.

Calibrating the sensor by filling up from near empty 10 litres at a time and  recording the measurements  is a good solution, but a pain in the neck to implement at a busy fuel wharf.

Has anyone else done a volume vs depth calculation for the H400 tank?

I find the fibreglass bonding the tank to the hull gets in the way of accurate  dimensional measurements, and the subsequent volume calculations are difficult because of the multiple bends in the bottom of the tank. Maybe the tank supplier can tell us? I will ask them.

Using Arduino with look up table, it should be possible to create a quite accurate fuel gauge procedure accurate level is known when stationary.
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Fendant View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fendant Quote  Post ReplyReply Direct Link To This Post Posted: 08 April 2021 at 05:14
Do you have the 160 ltr Polyethylene tank ? 

If so please PM me, I have made a calibration curve in 2013 and can send you the powerpoint.

Frank
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DJgun Quote  Post ReplyReply Direct Link To This Post Posted: 08 April 2021 at 09:27
Mine has a stainless steel tank, but thank you for the offer. Is your tank also 140 litres?
The sender fitted is a VDO lever arm type

226-801-015-001C  or G


It seems the resistance on my sender is incorrect as I have measured it 240ohms tank full, rather than 180 ohm expected for VDO sender.

Cheers DJ 


Edited by DJgun - 11 April 2021 at 13:57
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Sportswagoneer Quote  Post ReplyReply Direct Link To This Post Posted: 17 April 2021 at 18:39
Originally posted by Fendant Fendant wrote:

Do you have the 160 ltr Polyethylene tank ? 

If so please PM me, I have made a calibration curve in 2013 and can send you the powerpoint.

Fendant: I believe my heavy black plastic tank is the Polyethylene version. Would love to see your calibration curve! Please see PM.
2010 Hanse 400 #700 “Neste Sommer”
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