Mass/Flow Meter?
Mass/Flow Meter?
(OP)
I have a need for a flow meter that can measure water: 3nL/pulse, 1 pulse per second, so that the accumulated accuracy for 30nl is better than .3 nL.
Any suggestions? We are trying weighing with a pecision scale but the water keeps evaporating. I can control the evaporation, but would prefer to buy an off the shelf instruments.
Ray
Any suggestions? We are trying weighing with a pecision scale but the water keeps evaporating. I can control the evaporation, but would prefer to buy an off the shelf instruments.
Ray





RE: Mass/Flow Meter?
RE: Mass/Flow Meter?
what about magnetic flow meters
only if we have coductive fluid
adil4adil
RE: Mass/Flow Meter?
market in Pipetters for medical research putposes. These
managed to satisfy our needs.
RE: Mass/Flow Meter?
What is the brand of the unit that finally worked for you?
Rocco8
RE: Mass/Flow Meter?
We used the Matrix Impact2
http://www.apogentdiscoveries.com/LH/Impact.asp
Good enough. Go back up to
http://www.apogentdiscoveries.com
to find other things; automated ... etc.
Ray
RE: Mass/Flow Meter?
http://www.measureanything.com/products/44907-2284/datasheet_44907-2284_DFS2W_disposable.asp
excerpt:
The DFS-2W has a linear flow range of 0.07– 4.5 l/m (.02–1.2GPM), turndown of 64:1, resolution of 60,000 pulses/liter (227,100/Gal.) Process connection is 7mm ( 9 /32 ") hose barb fitting.
Cheers!
Tom Ramey
RE: Mass/Flow Meter?
Thanks, but the resolution doesn't seem adequate. The design reminds me of an idea I had to make a 0 pressure drop flow meter using a higher order control loop to drive a pump just so that the pressure drop around the pump was zero. I envisioned a smooth spiral type of rotor.
Never did anything with it though. Just an idea when we wanted to experimental monitor flow without disturbing the flow.
Thanks again
Ray
RE: Mass/Flow Meter?
not a bad idea, doesn't sound to energy-efficient though, lasers, optical, magnetic, all the non-contact technologies are comig along steadily, in terms of non-invasive flow measurement. Last thing the world needs is another flowmeter, also, there are thousands of designs and embodiments. Anyway, enjoy the Veteran's Day holiday, I'm doing some landscaping/gardening myself, just checking in on email every hour or two to keep the empire rolling. Ciao!