Measurment.

[PAFred]

Dose anyone know of any in-expensive device's that are small enough and for the most part accurate that can be affixed to the inside of well pipes for constant measurment of the height of water from the device to the water surface in the well in order for a computer to be connected to it for a continuos read.

I want to be able to monitor the amount of useable water in a well continuosly. To do this I need something that can tell me the distance from the end of a device to the surface of the water in the well in a format that can be input to a formula for example in a spread sheet such as Excel that can tell me total useable gallons and show a month by month graph of the condition of the water supply vers demand.

 

[quark]

PAFred!

You can use Endress+Hauser make ultrasonic level transmitters which are cheaper. You will get conventional as well as smart transmitters. Smart transmitters are based on HART Protocol. For pure water application they are very good.

Note: In the presence of volatile matter they are not advisable.

Regards,

 

[camabee]

Try a submersible 2-wire well level transmitter. eg

http://www.pressuresystems.com

 

Simply take a small pipe / tube and put lower open end be submerged in the water for a certain depth. Then connect a pressure gauge and an air compressor to the upper open end pipe. Adjust air flow to make a stable air flow into the pipe (preferably small flow) to make air bubble in water.
Thus the depth between submerged open end pipe and water surface can be read directly at the pressure gauge.
i.e.: 1 BAR means 10 metre depth, 0.5 BAR means 5 metre etc.

 

[PAFred]

Thats an interesting and very accurate way, your right. I've used this type of measurement in the past on other projects that I've done for the Government, it called the bubbler system. Murphy switch Gage Inc. makes gage's that use this means. However I dont think I could use it for measuring well water due to the depth involve- you would'nt be able to see the bubble imerge thus there would'nt be a stable and accurate way to find that moment. If you know what I mean.

But thanks for reminding me of this type of measurement I very well may be able to use it again somewhere else.

 

[BobPE]

Bubblers are pretty standard in the water industry and are very indestructible. The issue FredPA brough up is very improtant to consider. To get around this we use a small volume rotameter to measure the air flow to a point where air is bearly moving in the sense tube...

I hope this helped somewhat...

BobPE