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Mass/Flow Meter?

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

RE: Mass/Flow Meter?

Maybe a Thermal Liquid flow meter? (standard smallest range 0-12.5 mg/hr normally) You can ask manufacurers how low they can go. The smallest corioles meters go down to 50 g/hr, but there are rumours smaller ranges are on the way.

RE: Mass/Flow Meter?

hi Sierra

 what about magnetic flow meters
 only if we have coductive fluid

 adil4adil

RE: Mass/Flow Meter?

(OP)
We have solved the problem.  It turns out that there is a
market in Pipetters for medical research putposes.  These
managed to satisfy our needs.

RE: Mass/Flow Meter?

Ray,

What is the brand of the unit that finally worked for you?

Rocco8

RE: Mass/Flow Meter?

(OP)
tomramey,
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?

Ray --
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!

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