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Guys thank you so much for all the responses, suggestions and chipping in, I appreciate all the effort it makes the load lighter

hydtool, as it is I have the average flow coming in as 2.1m3/hour but it is the outflow rate I am concerned about. Please note picture attached http://files.engineering.com/getfile.aspx?folder=69795088-c956-4cb2-b75c-c4e744c7d45f&file=20161017_134053.jpg

flow coming inside the siphon chamber,i think that if the leak is as large as the incoming flow then definitely it would be noticed at the outlet by a flooding at the surface where the plants...

siphon photo attachedhttp://files.engineering.com/getfile.aspx?folder=99793a62-427a-47d8-b243-6ce57adf2a89&file=20161019_125209.jpg

I have attached some siphon photoshttp://files.engineering.com/getfile.aspx?folder=c768e126-f7c6-4101-a22a-d93cbcaf211f&file=20161019_125220.jpg

hydtools, we added a few weights to help it sink , maybe not enough?

LittleInch, thank you let me look into that

Katmar, thank you I will check for the leak on the outlet pipes feeding the plants, my question still is if there is a leak somewhere how come the siphon still manages to discharge even once, or twice or could be because of the increase in incoming flow rate, is so i have the second graph that...

bimr, would trapezium flumes fit with the pipe diameter i have and where exactly would i insert them? sandcounter,i know ballistics for a projectile are they any for flow in a pipe? and since the height in the pipe is always varying would they work?

Penpipper, A flow meter was used before and it did not work well, so I'm tring to run away from a flow meter

Thank you all for responses The pipe is never full maybe a quarter way full, it is on a flat surface, a bucket cannot be used since the depth between the pipe and water surface is low as shown in the diagram. the flow rate is approximately 0.47m3/hour, worse case 0m/hour, minimum 0.06m3/hour...

bimr, currently the treatment system is using a float siphon so rather than replacing it with a bell one the company wants to minimum purchasing costs and just fix whatever is wrong with the float one

hydtools, yes it's the system I have, thank you for the idea. will do that

No it does not fit well. I'm measuring flow rate from an waste treatment outlet

Oooo did not know, thank you how about venture flume is it applicable to low flow rates? I had also thought of using a positive displacement pump to measure volume per time

Yes I was looking for a device maybe that can give me volume per specific time. is the use of the following feasible for a low flow rate pitot tube, vortex meter, pygmy meter, flume?

Thank you for response , will try and get a proper engineering diagram, currently I'm looking for any leaks towards the outlet, and do not seem to find any

I have 110mm pipe that is receiving outlet wastewater from a treatment system. the flow is continuous but can be zero at times but mostly continuous, It varies constantly diurnal mainly and is very low. I am looking for an alternative way to measure the flow rate of water from the pipe without...

I have attached a pdf to help illustrate how it works, the last page has the essential detailshttp://files.engineering.com/getfile.aspx?folder=632eb85b-b3ce-4deb-bc24-c160243bbefc&file=float_siphon.pdf

Thank you all for responses I have tried again to upload it Im not sure if it worked out well, In case it hasn't the link to the you tube video is https://www.youtube.com/watch?v=mxrBqMxbbS4 the float siphons works by buoyancy principle when water reaches a certain height, it acquires a...