LOW PRESSURE DROP - 3.imimg.com
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alicat.com LOW PRESSURE DROP FLOW METERS & CONTROLLERS DESCRIPTION Alicat Scientific has once again raised the bar when it comes to low pressure drop mass flow instruments. Our new Whisper Series offers the lowest pressure drop available for mass flow metering or control on the market today. In applications where accurate measurement and control are required — and minimum pressure drop is essential — the Alicat Whisper may be your only choice. This is especially true in natural gas flow control, leak checking and other low pressure applications under 1 psig. Whisper meters and controllers are available in full-scale ranges from 0.5 sccm to 500 slpm full scale with a 200:1 turndown ratio and pressure drops ranging from 0.1 psid to 0.7 psid. Compare this to the typical industry standards, which can exceed 30 psid depending on the full-scale range, and your choice is simple…the Alicat Whisper. BENEFITS The chart below shows typical pressure drop curves for the Whisper MW-100SLPM Mass Flow Meter and MCRW-100SLPM Mass Flow Controller. FLOW (SLPM) PRESSURE DROP (PSID) 0.0590 0.1294 0.2090 0.2996 0.0000 0.0500 0.1000 0.1500 0.2000 0.2500 0.3000 0.3500 25.00 50.00 75.00 100.00 0.0547 0.1128 0.1742 0.2392 WHISPER MCRW-100SLPM Controller WHISPER MW-100SLPM Meter FEATURES Whisper retains the same laminar flow technology and lifetime warranty standard to all Alicat mass flow products — without the need for higher inlet pressures. That means no warm-up time, a 10 ms response time for flow measurement and a 100 ms response time for flow control. Of course, the Whisper also includes Alicat’s standard digital display with push-button interface and 30 selectable gas calibrations. The next time your pressure drop is too high, don’t shout…Whisper .
Transcript of LOW PRESSURE DROP - 3.imimg.com
alicat.comLOW PRESSURE DROPflow meters & controllers
DESCRIPTIONAlicat Scientific has once again raised the bar when it comes to low pressure drop mass flow instruments. Our new Whisper Series offers the lowest pressure drop available for mass flow metering or control on the market today.In applications where accurate measurement and control are required — and minimum pressure drop is essential — the Alicat Whisper may be your only choice. This is especially true in natural gas flow control, leak checking and other low pressure applications under 1 psig.Whisper meters and controllers are available in full-scale ranges from 0.5 sccm to 500 slpm full scale with a 200:1 turndown ratio and pressure drops ranging from 0.1 psid to 0.7 psid. Compare this to the typical industry standards, which can exceed 30 psid depending on the full-scale range, and your choice is simple…the Alicat Whisper.
BENEFITSThe chart below shows typical pressure drop curves for the Whisper MW-100SLPM Mass Flow Meter and MCRW-100SLPM Mass Flow Controller.
FlOw (SlPm)
PRES
SuRE
DRO
P (P
SID
)
0.0590
0.1294
0.2090
0.2996
0.0000
0.0500
0.1000
0.1500
0.2000
0.2500
0.3000
0.3500
25.00 50.00 75.00 100.00
PRESSURE DROP (PSID)
PRESSURE DROP (PSID)
0.0547
0.1128
0.1742
0.2392
WHISPER MCRW-100SLPM Controller WHISPER MW-100SLPM Meter
FEATuRESWhisper retains the same laminar flow technology and lifetime warranty standard to all Alicat mass flow products — without the need for higher inlet pressures.
That means no warm-up time, a 10 ms response time for flow measurement and a 100 ms response time for flow control.
Of course, the Whisper also includes Alicat’s standard digital display with push-button interface and 30 selectable gas calibrations.
The next time your pressure drop is too high, don’t shout…Whisper.
alicat.com
wHISPER low Pressure Drop mass Flow meters and Controllers0 to 0.5 sccm full scale through 0 to 500 slpm full scale
WHISPER instruments are highly specialized for very low pressure flow applications and should only be ordered after consultation.
SPECIFICATIONS
SpecificationMW Mass Flow Meter
MCW Mass Flow ControllerMCRW Mass Flow Controller
Description
Accuracy ± (0.8% of Reading + 0.2% of Full Scale) At calibration conditions after tare
High Accuracy Option1 ± (0.4% of Reading + 0.2% of Full Scale) At calibration conditions after tare
Accuracy: Bidirectional meters Only ± (0.8% of reading + 0.2% of total span positive Full Scale to negative Full Scale) At calibration conditions after tare
Repeatability ± 0.2% Full Scale
Operating Range 0.05% to 100% Full Scale Measure
Turndown Ratio 200:1
Typical Response Time MW: 10MCW and MCRW: 100 Milliseconds (Adjustable)
Standard Conditions (STP) 25 ºC & 14.696 psia Mass Reference Conditions
Operating Temperature −10 to +50 ºCelsius
Zero Shift 0.02% Full Scale / ºCelsius / Atm
Span Shift 0.02% Full Scale / ºCelsius / Atm
Humidity Range 0 to 100% Non–Condensing
Measurable Flow RateControllable Flow Rate
MW: 128%MCW and MCRW: 102.4% Full Scale
Maximum Pressure 145 psig
Output Signal Digital Mass Flow, Volumetric Flow, Pressure & Temperature RS-232 or RS-485 or PROFIBUS2
Output Signal Analog Mass Flow 0-5Vdc, 1-5Vdc, 0-10Vdc or 4-20mA
Optional Output Signal Secondary Analog Mass Flow, Volumetric Flow, Pressure or Temperature 0-5Vdc, 1-5Vdc, 0-10Vdc or
4-20mA
Electrical Connections 8 Pin Mini-DIN, DB9 or DB15
Supply VoltageMW: 7 to 30 Vdc (15-30Vdc for 4-20mA outputs)
MCW: 12 to 30 Vdc (15-30Vdc for 4-20mA outputs)MCRW: 24 to 30 Vdc
Supply CurrentMW: 0.040 Amp (+ output current on 4-20mA)
MCW: 0.250AmpMCRW: 0.750Amp
Mounting Attitude Sensitivity MW and MCW: NoneMCRW: Mount with valve cylinder vertical & upright
Warm-up Time < 1 Second
Wetted Materials3
MW: 303 & 302 Stainless Steel, Viton®, Silicone RTV (Rubber), Glass Reinforced Nylon, AluminumMCW: 303 & 302 Stainless Steel, Viton®, Silicone RTV (Rubber), Glass Reinforced Nylon, Aluminum, Brass, 430FR Stainless Steel, Silicon, Glass.MCRW: 303 & 302 Stainless Steel, Viton®, Silicone RTV (Rubber), Glass Reinforced Nylon, Aluminum, 416 Stainless Steel, Nickel, Silicon, Glass
1. High Accuracy option not available for units ranged under 5 sccm or over 500 slpm.2. If selecting PROFIBUS, no analog signal is available. PROFIBUS units do not have the display. See PROFIBUS
specifications for PROFIBUS supply voltages and currents.3. If your application demands a different material, please contact [email protected] or 888-290-6060 for available options.
Standard Operating Specifications (Contact Alicat for available options.)
Pressure Drop Specifications for whisper Series Flow meters and Controllers
FS Flow MW Meter Pressure Drop at FS Flow* (psid) FS Flow MCW or MCRW Controller Pressure Dropat
FS Flow* (psid)
0.5 sccm to 2 sccm 0.06 0.5 sccm to 2 sccm 0.06
5 sccm to 20 sccm 0.07 5 sccm to 10 sccm 0.08
50 sccm 0.07 20 sccm 0.07
100 sccm to 200 sccm 0.06 50 sccm to 200 sccm 0.07
1 slpm to 5 slpm 0.07 1 slpm 0.18
10 slpm 0.08 5 slpm 0.10
20 slpm 0.25 10 slpm 0.12
40 slpm 0.12 20 slpm 0.26
50 slpm 0.14 50 slpm 0.17
100 slpm 0.24 100 slpm 0.30
250 slpm 0.60 250 slpm 0.69
500 slpm 0.39 500 slpm 0.69
* Venting to atmosphere.
Standard Compatible Gas list for whisper Series Flow meters
0 Air Air
1 Argon Ar
2 methane CH4
3 Carbon monoxide CO
4 Carbon Dioxide CO2
5 Ethane C2H6
6 Hydrogen H2
7 Helium He
8 Nitrogen N2
9 Nitrous Oxide N2O
10 Neon Ne
11 Oxygen O2
12 Propane C3H8
13 normal-Butane n-C4H10
14 Acetylene C2H2
15 Ethylene C2H4
16 iso-Butane i-C4H10
17 Krypton Kr
18 Xenon Xe
19 Sulfur Hexafluoride SF6
20 75%Ar / 25% CO2 C-25
21 90% Ar / 10% CO2 C-10
22 92% Ar / 8% CO2 C-8
23 98% Ar / 2% CO2 C-2
24 75% CO2 / 25% Ar C-75
25 75% Ar / 25% He A-75
26 75% He / 25% Ar A-25
27 90% He / 7.5% Ar / 2.5% CO2 Helistar® A1025 A1025
28 90% Ar / 8% CO2 / 2% O2Stargon® CS Star29
29 95% Ar / 5% CH4 P-5
Contact Alicat for other available gases and gas blends. For aggressive gases see our MS Meters and MCS. Controllers.
WHISPER MW-50SCCM shown with welded fittings
Visit alicat.com to view the complete specifications for wHISPER meters and Controllers.
