can i use variable flow meter in the place of mass flow meter?
476622
You really need to be talking to the manufacturers of the equipment in question. They will know more about what their meters will do than anyone else.
1168897
It depends on the pressure pump and the resistance of the pipe.\nSee http://docs.bentley.com/en/HMFlowMaster/FlowMasterHelp-06-02.html
810714
the velocity of fluid flow is proportional to area.\nfind the total area of one 4 mm tube compared to 2  mm tubes.  Here is a hint, they wont be the same.
396771
go here and check on accu check products on the left hand side. \nhttp://www.accu-chek.com/us/rewrite/home/en_US\n\ncheck on downloads on the left side and see if your meter is in there. Good luck.
657436
I assume the pump performance curve is unavailable, pity. You know what the current rpms, pressure and power is. I would apply the pump affinity laws in order to determine what the increase in rpm(flow) and power it will take to make the pressure you require. It may be  easier getting a bigger motor for the existing pump, than going through the time and effort of a single new pump, pumps in series, piping reconfiguration etc, all of which will work.
584159
water consumption varies with the type of fixture
616616
1)venturimeter and orifice are very cheap as compared to rotameter.\n2) they often don't need any calibration or maintainance once they are installed\n3) Any orifice or venturimeter can be used for measurement of any kind of flow. ( A rotameter used to measure flow of water can't be measured as it is to measure flow rate of mercury. one either needs to change the float or put the rotameter upside down and recalibrate.\n4) a rotameter can't be used for a flaow of liquid containing gas or liquid containing solid\n\nStroha
823030
You could use a resistor in series for the voltmeter and a shunt resistor in parallel with the ammeter.  You can also use a signal amplifier to transform the input signal to one that is within the range of the meter.  If it is a panel type meter, do not forget to change the scale behind the meter.\n\nJeffM
580210
Most fluid flow handbooks have this information. The Foxboro company use to have the very best manual for this.You might find one on ebay. Many thermodynamics text books also have this information.
1082340
Flowmeters are calibrated for a specific gas (e.g. nitrogen for the RTA). To calculate the flow rate of another gas, multiply the reading by the ratio of the conversion factor or the desired gas to the conversion factor for the calibration gas. For example on the RTA (calibrated for nitrogen), if the indication is 200 ml/min and the gas is Argon, the actual flow rate is 200 * 1.443=288 ml/min.\n\nGAS         FACTOR\nNitrogen    1.00\nOxygen      .996\nArgon       1.443\nAir         1.00\nHelium      1.454\nWater Vapor 0.817
1021379
Not real sure of the concept behind this as I have never worked on one. I assume it use a Wheel of some sort that spin with the amount of Volume. Electronic Meters could use a type of sensor that can meter the Volume by different electronic methods such as Ultraviolet light. I will look around and see what Info I can find. This is a good question you ask, that I have never really had a need to ask, now I am curious.\nYea, it depend on the type of application as to the type and function of the meter. Very much to learn here. There are Ultrasonic Meter, Venturi, Magnetic etc. it Awesome. But, the Basic function is to control/meter the amount of whatever you transferring for different reasons.
179215
can you be more specific, ie are you trying to use it in msgr?
596813
There is indeed a machine, called a light meter, that you can use. You an also use a device called a Secchi disk which is much more low tech.
974206
As I said in my answer to your other question, be sure you are making a firm connection.  By how much is the reading changing?  If it's a digital meter, each reading is a separate measurement, and any series of measurements will show at least some differences.
817465
You know three of the four things needed. Try C1V1=C2V2, or an equality.\n\n                          m/ml=m/x
336813
It depends on what data you want to collect.  Cycle time?  Temperature?  Pressure?\n\nAll of these can be done with aftermarket sensors and data acquistion equipment.  If you do not have the expertise in-house to implement something like this, I would suggest that you call up either your molding machine rep for some referrals or a systems integrator.  Either should be able to help you.
31492
the answer to your question is pretty simple in logic.\nthe factor K for venturimeter is higher since the friction due to obstruction to the flow is higher in the case orificemeter. where as in the case of venturimeter the friction due to the difference in flow area is compensated by graduated tapering.