Is the WNT water flow meter weather proof? Can it be installed outdoors?
These are IP67 rated. Protected from total dust ingress. Protected from immersion between 15 centimeters and 1 meter in depth.
i have a WMT2-A-C-03 water flow meter , so how do i change the pulse setting from 0.1 gal/pulse to 1 gal/pulse
The pulse output is fixed to the meter and cannot be changed in the field. You would need a WMT2-A-C-03-1 to achieve 1 gal/pulse output.
I Need a variable area flowmeter that will work with hydrogen, will any of the poly bodied units like the RMA/B work, or do I need a glass vial?
Yes, can use the Series RM or VF with hydrogen.
Are metric versions of the WNT available?
Yes, metric WNTs are available when purchased in quantities of 100 or more.
I have a question about the Series 160 Pitot tube. I am wondering whether you can use this as a water flow measurement instead of air flow measurement. Best, Thanks
Our Series 160 pitot tube is specifically designed to monitor or control air velocity or air flow and not water flow. Our Series DS in-line flow sensors can be used for flow rate sensing of compatible gases and liquids for schedule 40 pipe.
Would a UFM-1 and a PPM-100 be a good match to monitor and total domestic water usage for an apartment building? The UFM-1 would be able to be powered from the 24VAC output from the PPM-100, correct? Would the PPM-100 be able to interpret the pulse signal
The Model UFM-1 compact ultrasonic flowmeter sends out pulse signals which can be picked up by the Series PPM pulse panel meter. Also, the Series PPM has an isolated 24VDC power supply which the UFM-1 can use. The Series PPM meter has a 6-digit readout which means that it can read up to a million (gallons, liters, m3, etc.). After surpassing the million mark that readout will reset to zero and begin counting again. If needed, the Series PPM can be configured to read continuously, surpassing the millionth mark, by setting the conversion factor on the unit.
What are wetted materials in following flow meter part numbers? Are they compatible with HCl? MMF-10-TMV MMF-10 MMF-2-TMV MMF-2 Is MMF available in 4or 5 SCFH full scale? What is ball material for these ranges above?
The Series MMF flowmeters have the following wetted materials: Body: Styrene Acrylonitrile Float: Stainless Steel, Black glass, Nylon Valve: Polyurethane For the -2 range, the ball material is 302 stainless steel. For the -10 range, the ball material is nylon. Unfortunately, these materials are not compatible with HCl. Also, the 4 or 5 SCFH range is NOT a standard range for the MMF. The -10 range number would be the logical choice to pick since the 4 or 5 SCFH range would be encompassed.
What is the calibration frequency, if required, for a RMB flowmeter?
Calibration frequency would be once a year if necessary. We offer a NIST calibration certificate which expires in one year. Contact Customer Service at 800-872-9141 Ext. 656 for current cost.
I have a model V4 flow switch the Micro switch failed I replaced it. I reinstalled and couldn’t accurate switch. Attempted to set as sensitive as possible I couldn’t get it to actuate, I replaced the magnet with one from another unit it works fine! Where
Unfortunately, we do not sell the replacement magnet. It would be best to return the unit to the factory for repair.
I use the TFM-LP Series Flow Meters for some of my OEM project. I am using the Stainless Steel Model at this point because the unit is measuring deionized water, 18 meg ohm deionized water in a clean room environment. Can I use the TFP-LP model with Deion
The Dwyer Series TFM-LP Liquid Turbine Flow Meter is compatible with DI water. The PPS material, also known as Ryton, is also compatible with DI water.
What is the maximum flow rating on your Series V6 FLOTECT Flow switch?
The maximum flow rating would depend on the specific model of V6 taking into consideration taking into account the line size and whether a tee is installed or not.
Are your flowmeters (particularly the brass body models) RoHS compliant? Can you provide a statement to that effect?
You can find the RoHS Compliance letter in the tab marked APPROVALS on RM Series.
Where is the date code or lot number located on the flowmeter Model RMA-3-SSV?
The date code is on the label.
For the VFA-44-BV product, what is the minimum flow that I can reliably control with a pressure head of up to 4 bar? Will the needle valve function properly at that pressure/flow combination? Thank you.
At a pressure of 4 bar (58 psi), the needle valve should function properly and provide reliable control over the whole range, which is 8-40 gallons of water per hour.
I purchased 4 OP-F-3 orifice plates. I do not find a torque value in the IOM for our flanges. What should these be torqued to? We typically buy 2", 3", and 4" orifice plates and are seeking to standardize on Dwyer. When you provide torque valves include a
For all orifice plate installations, please follow the recommended flange torque rating based on the specific flanges used.
Will a DR4244 show an accurate measurement of flow with Methane or is there a converstion We need to use?
The scale on the DR direct reading flow meters is in millimeters. Therefore, they will come with a conversion chart to convert from millimeters to flow rate for air and water. You will then need to correct that chart to be used for Methane by correcting for the difference in specific gravity. These flow meters can be used to accurately measure the flow of Methane though.
I see that the SFI-300 MIDWEST Sight Flow Indicator has a flow direction shown as an arrow. What will happen if water flows in the opposite direction? Will the rotating impeller rotate in both directions? I want to use the indicator on a wakeboard boat to
The inlets and outlets for SFI-300 are designed for flow to only be in one direction. You could physically push flow in the opposite direction, but you would risk damaging the impeller, and you would not get a true indication of flow.
How many sensing points are there on a 6" DS-300 In-Line Flow Meter?
The 6” DS flow sensor has 4 sensing holes. (3” and larger all have 4 holes, sensors smaller than 3” have 2 holes).
What is the difference between a Gas Mass Flow Meter to a Gas Mass Flow Controller?
The major difference between the GFM and the GFC is the that GFM is just used to measure the flow going through the meter. The GFC has the added feature of a electromagnetic valve to control the flow to a desired set rate. Our newer GFM flowmeters (GFM2, GFM3, and GFM4) have some added features to the base GFM unit, such as optional relays, push button configuration, and pressure and temperature monitoring, respectively.
I recently purchased an WM2-A-C-01, For my application the pipe is vertical with the water flowing downward. The instructions mention that it should be mounted horizontally. Is it ok to mount vertically?
Multi-jet meters use multiple ports surrounding an internal chamber to create multiple jets of water against an impeller. The impeller rotation speed depends on the velocity of the water flow. If your water is flowing downward it will not rotate the impeller as it does in a horizontal pipe or in a up flow condition. Therefore, you cannot install this instrument in a vertical down flow application and receive accurate readings.
Instruction Sheet specs on RM series flowmeters list 100 PSI max pressure, but have seen several RMC flowmeter labels with 35 PSI max pressure rating. Some clarification on pressure ratings please? Thank you.
The older version of the RMC used to have a pressure limit of 35psi because the backplate was assembled from 2 seperate pieces. The pressure rating increased to 100psi when we began to stamp the backplate from 1 solid piece.
We use 4 different VA flow controls, we have VA12418 (M) and VA12420 (H). We also have the same size but marked (L). What are the correct part numbers for the "L" and what does it mean?
The letters on the knobs of the VA Series tell us what type of valve is on the flow meter. There are many different types of valves and they are sized based on what the maximum flow rate would be (ex. Valve M has a different maximum flow than Valve H). It really doesn’t tell us anything about the part number of the flow meter. This part number should be on the meter itself or on the correlation data sheet that came with it.
I am looking to use an "Air" flowmeter RMA-6-SSV to monitor CO2 flow. I am wondering if there are are any concerns or correction factors I need to apply.
A specific gravity correction factor will need to be considered when monitoring other gases with a meter calibrated for air. The correction factor equation is as follows: Q2=Q1 x sqrt (1/S.G.) Where: Q1= Observed Flowmeter reading Q2= Standard Flow Corrected for Specific Gravity 1= Specific Gravity of Air or Water S.G.= Specific Gravity of media being used in flowmeter originally calibrated for air or water.
This equation can be found in the beginning of the Flow section in the catalog. Alternatively, special ranges and scales can be provided; for specific information please contact our customer service department.
For further information, see our "Tech & Specs" Video Blog: Fix your Flow... Specific Gravity and Pressure Corrections for Variable Area Flowmeters (Episode 4), in Dwyer's Video Library.
We have several VA Flowmeters. We are flowing Helium through them and need to know what the flow rate is for the actual helium based on the conversion rates to Air. Do we multiply or divide by 2.69?
Yes, you will need to multiply your reading by 2.69.
Is a Dwyer Certificate of Conformance offered with any of the flowmeter models?
A standard Dwyer Certificate of Conformance can be offered with all Dwyer Mini-Master®, Rate-Master®, and Visi-Float® flowmeters on all water ranges (or other compatible liquids).
Which flowmeters are available with NIST traceability?
All Dwyer Mini-Master®, Rate-Master®, and Visi-Float® flowmeters are available with NIST traceability on all air ranges except for RMA-1, RMA-11, RMA-150, RMA-151, VFA-1, VFA-21 and VFB-60 models.
Are special ranges available for the Rate-Master® and/or Visi-Float® Flowmeter?
Yes, other ranges are available which are not specified in our catalog. Please feel free to contact Dwyer with questions on these ranges.
Is the Rate-Master® or Visi-Float® Flowmeter compatible with any media?
The Rate-Master® Flowmeter is manufactured from a polycarbonate plastic and the Visi-Float® Flowmeter is manufactured from acrylic. Compatibility charts need to be reviewed to determine if these materials of construction are compatible with your media.
Why are top mounted valves recommended for flowmeters used for vacuum service?
To maintain atmospheric pressure in the indicating bore and therefore preserve accuracy; an inlet restriction would reduce pressure in the bore. This is essentially the opposite situation to outlet back-pressure in a pressure system which increases pressure in the bore and also affects accuracy. Remember that all standard Dwyer flowmeters are calibrated for standard atmospheric pressure and temperature in the bore.
What factor is used to correct for different flowmeter inlet pressure?
If the flowmeter is exhausting to atmosphere, no correction factor is needed. If back-pressure is present due to downstream plumbing or restrictions, this error can be corrected utilizing the conversion curves in our full-line catalog or the following equation.
Pressure: Q2 = Q1 x √((P1 x T2)/(P2 x T1))
Where:
Q1 = Observed Flowmeter Reading
Q2 = Standard Flow Corrected for Specific Gravity
P1 = Actual Pressure (14.7 psia + Gage Pressure)
P2 = Standard Pressure (14.7 psia, which is 0 psig)
T1 = Actual Temperature (460 R + Temp °F)
T2 = Standard Temperature (530 R, which is 70°F)
How are Dwyer flowmeters properly read?
The flow rate is read at the maximum width portion of the float regardless of shape.
