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Old 11 April 2014, 10:41   #1
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Fuel Flow Meter

Hi All, a couple of RIBs back i had a Navman which had a really handy function that i could add fuel to and the system told me how much was left at any time. I have an under deck tank on my Delta which holds 295L and i would love to find an instrument like the F210. Does anyone know of one on the market ?
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Old 12 April 2014, 05:42   #2
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This site's content is perhaps a little blunt, but has the information that you require:
Http://www.giyf.com

I'm not that blunt, so here is some info:

I have a lowrance HDS range plotter/sounder that does this (HDS 5m gen2)

it has a fuel flow sender model "EP-60r" which sends the fuel flow rate via NMEA2000 to the plotter or other NmEA2000 fuel flow gauge. You tell the plotter how big your tank is, and when you fill it up (either all the way or just how much you add) and it displays various fuel related thinks like a virtual level, consumption rate, range etc
Garmin do one called the GFS 10 sensor, which communicates via NMEA2000 or their CANnet interface. You would plug this into a suitable plotter/display unit.

Some modern engines have a flow sensor built in to the engine that can output flow rate onto a NMeA or proprietary data bus

There are also liquid level sensors that are fuel compatible. For example the lowrance EP-65r .These output a level value (full to empty) via NmeA2000 which will display a tank level gauge on your plotter that you can calibrate to a volume of fuel, but are not accurate enough to determine fuel flow rate

A level sensor in conjunction with a fuel flow rate sensor is an ideal combination; the flow sensor is perhaps 10% accurate, and if you just do a partial tank top up each time then these errors will compound to give you a false level reading if used on its own ( filling to the brim effectively re-calibrates the level).
Combine the level and flow sensor together and you will know if you have a leak or other loss from the system unaccounted for by the flow rate, and whether the flow meter errors are adding up, necessitating a full-top up .
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Old 12 April 2014, 11:15   #3
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You have to go NMEA now so a lowrance LMF 400 and a fuel flow sensor. Problem is it's expensive and you are talking about 300-400 all in.
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Old 12 April 2014, 14:26   #4
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inline fuel flow sensors are notoriously inaccurate, especially at low speeds.
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Old 13 April 2014, 13:00   #5
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Expensive ,,,, but very accurate and well made. I've had (the same) one for 14 years
( when the :$ was MUCH better )

Flow meter and totaliser

http://www.floscan.com/html/blue/ser...ail.php?sid=16
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Old 13 April 2014, 13:27   #6
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Got to agree, Floscan meters are very good. I use it almost as much as the rev counter.
UK dealer is Merlin in Poole, but be prepared for a big bill
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Old 13 April 2014, 18:10   #7
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3rd for the floscan. Fantastic kit wouldn't want to be without really.
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Old 14 April 2014, 07:53   #8
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Floscan $

Even with shipping and VAT these are probably cheaper than UK sourced. Remember you want the metric version ( as opposed to Galls >> US galls!)
USPS are usually the lowest shipping

https://www.dbmarine.com/sales/produ....asp?M=Floscan
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Old 14 April 2014, 11:25   #9
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Quote:
Originally Posted by Pikey Dave View Post
inline fuel flow sensors are notoriously inaccurate, especially at low speeds.
Level sensors are worse, especially in swell, and differing attack angles.

To be honest, I was pretty surprised at how accurate my Lowrance EP-60 was.

jky
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Old 16 April 2014, 07:02   #10
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I don't have a fuel flow, but can add a "+1" to the other Lowrance NMEA2000 sensors - I have cyl head temp & coolant pressure on my plotter.

I did look into this - I think the trick generally is getting one matched to your flow & calibrating it properly.


Level gauges are at best a rough indication.
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