Whisper™ MW–Series: Low Pressure Drop Mass Flow Meters

Whisper™ MW–Series Low Pressure Drop Mass Flow Meters measure mass and volumetric flow rates when there is little available system pressure, with pressure drops as low as 0.07 PSID (4.8 mbarD).

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Whisper devices are built for processes with little available inlet pressure or a large amount of back pressure. These devices have a larger flow body and uniquely arranged laminar flow elements, resulting in pressure drops up to 10x lower than standard devices. Whisper instruments also utilize a much more sensitive pressure sensor package to take full advantage of the lower pressure readings.

FastTrack 5 day shipping options

FastTrack products are built to order and shipped within 5 business days. Eligible products include:

Ranges: 2 SCCM to 100 SLPM
Calibration: Standard or high accuracy
Display: Monochrome, color, or none
Communication protocol: Analog, RS-232, RS-485, or Modbus RTU
Electrical connector: 8-pin mini DIN, DB9, DB15, or locking industrial
Fittings: NPT

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Specs, features, and customization options

Alicat builds each instrument to order to meet your specific process needs. See additional configuration options below or speak with an applications engineer to optimize your device.

Quick Specs

Devices are custom ranged from 0.5 SCCM full scale to 1,000 SLPM full scale.

Standard specs

Full scale ranges: 0.5 SCCM to 1,000 SLPM
Measurement range: 0.01% – 100% of full scale
Accuracy: ±0.75% of reading or ±0.1% of full scale, whichever is greater
Optional high-accuracy: ±0.6% of reading or ±0.1% of full scale, whichever is greater
Repeatability: 0.1% of reading and 0.02% of full scale
Response time: 127 ms
Operating temperature: –10°C to +60°C
Full scale operating pressure: 60 PSIA (4.1 barA)

Mass flow meter operating manual

Device features and accessories

Features

Simultaneously measure volumetric flow, mass flow, gas pressure, and gas temperature.
Field-adjustable engineering units and STP/NTP conditions.
Select process gas from 98+ preloaded NIST-traceable gas calibrations.
Define and store 20 custom gas mixtures of up to 5 constituent gases.
Read measurements from the backlit display and control configuration using the integrated touchpad.
Optional integrated dual flow totalizers and alarms.

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Accessories

FlowVision software (download)

Power supply, cables, and accessories sold separately

Build and performance options

Communication: Analog, RS–232, RS–485, Modbus RTU, Modbus TCP/IP, DeviceNet, EtherCAT, EtherNet/IP, PROFIBUS, PROFINET
Process connections: NPT, SAE, AN, BSPP/G, compression, VCR, VCO
Displays: Backlit monochrome or color; integrated or panel–mount; none
Elastomers: FKM, FFKM, EPDM, Silicone
Calibration: Standard or high-accuracy; custom calibration points

Customize further

Online Ordering*

Select Alicat Whisper configurations available in our online shop

Ranges: 0.5 SCCM to 5 SLPM
Display: Back-lit Monochrome
Communication protocol: Serial communication over micro-USB
Multi-gas calibration: 98-130 gases preloaded, plus COMPOSERTM gas composition firmware.
Battery: rechargeable Li-ion (1880 mAh).

Buy select devices online

*Available in CA, US, MX. If your country is not displayed, or you’re looking for faster shipping, contact us for more options: +1-520-290-6060 or via email at info@alicat.com.

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Our expert team of applications engineers is available to provide additional information, discuss your application, or answer any questions you may have.

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Whisper-Series Low Pressure Drop Mass Flow Meters from Alicat

Learn More

Brochure Manual MW-Series low flow device specs MW-Series mid flow device specs MW-Series high flow device specs

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