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Old 27 September 2014, 13:43   #71
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Hi,

which version do you have installed? The one that sends a three decimal floating point number or the one with four?

It might be the accuracy, although I haven't run into this situation.

I have the Microstream sensor, which works a bit better than the Futurelec one and I will try the new Bio-tech with the larger nozzle diameter.
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Old 27 September 2014, 18:49   #72
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Hi,

which version do you have installed? The one that sends a three decimal floating point number or the one with four?

It might be the accuracy, although I haven't run into this situation.

I have the Microstream sensor, which works a bit better than the Futurelec one and I will try the new Bio-tech with the larger nozzle diameter.
Hi.

I flashed the calibration script back to the unit to watch it counting. You can see the counts stop below about 1700 rpm.

This sensor is a turbine type flowmeter. Have you ever seen a positive displacement type flow meter for gasoline? I have used them for water meters in the past.

I guess the lager nozzle size would make it less accurate at low flow rates?

Have you got some web links to the other sensors?
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Old 27 September 2014, 22:03   #73
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All sensors have a minimum - maximum flow range.

I think it's not related to RPMs but fuel flow.

1700 RPM with the boat not on the water does not consume significant amount of fuel to make the turbine in the sensor turn.

The Microstream one is more sensitive. The good thing is that you can use any sensor with the application.

Look at the conrad.com site. There are numerous flow meters.

Will search for positive displacement flow meters for fuel.
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Old 28 September 2014, 17:56   #74
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I think the Micro-stream ones are positive displacement ones. But i cant see one which is suitable for gasoline on their website.

Bio-Tech do turbine and positive displacement models. Some go down to very low flow rates.
What model is your one? Where do you buy these from?
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Old 29 September 2014, 00:36   #75
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Microstream

http://m.ebay.com/itm/331194624136?nav=SEARCH

Bio-tech

http://www.conrad.com/ce/en/Search.h...=mainSearchBar

The one I got has a 3mm nozzle which is to small for my engine I think.


http://www.conrad.com/ce/en/product/...i-POM-97478940

That's the other one I have and is probably the best, but also the most expensive of the three.
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Old 06 October 2014, 15:34   #76
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I think the Micro-stream ones are positive displacement ones. But i cant see one which is suitable for gasoline on their website.

Bio-Tech do turbine and positive displacement models. Some go down to very low flow rates.
What model is your one? Where do you buy these from?
Contacted the Manufacturer of the Microstream sensor. They confirmed that the sensor is used in Gasoline applications as well.

It has a +-2% accuracy and about 2174 pulses per Liter, so better "resolution" than the others.
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Old 28 November 2014, 00:48   #77
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Attention! The Microstream sensor on the above link is fake! It's not from Aichi Dokei! It's a cheap copy. They give only 180 p/L. I confirmed this with the company. They say it's fake.

However I found a link to some used originals at about 19$ + Shipping

http://www.ebay.com/itm/351163931835?redirect=mobile

They work perfectly! Give 2174 pulses per Liter ! Awesome. That's the recommended sensor for this project.
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Old 05 January 2015, 21:39   #78
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Hi again.

Did you get this microstream sensor from ebay?
Any better?
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Old 06 January 2015, 01:29   #79
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Hi again.

Did you get this microstream sensor from ebay?
Any better?
Hi,

Yes I got it from eBay. Just search for of05zat. It costs 29$ now. It did cost 19$ when I bought them. They are used but it perfect condition.

In fact they are so good I bought another six.

They cosy 360$ new so it's a bargain!
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Old 13 January 2015, 14:11   #80
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How does it perform? Do you get a flow reading at engine idle? Does it restrict the flow at higher rpm?
What are the liquid connections? The manufacturers say its a female thread but they have some sort of nipple sticking out in the photos.
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