High-accuracy, multivariate flow measurement with minimal system impact
“Whisper” series mass flow meters with low pressure drop are the perfect instruments for measuring mass and volumetric flow rates. Low pressure drop minimizes system impact, enabling flow measurement at near-atmospheric pressures or when there is little available system pressure. A very wide usable flow range and on-board calibrations for multiple gases will keep this flow meter in operation for a long time.
Accurate. Measure flows with NIST-traceable accuracy for a variety of gases down to 0.01% of full scale, or define your own gas composition with COMPOSER™.
Easy to Use. As soon as you turn on the flow meter, it’s ready to display live flow, pressure and temperature readings in your choice of engineering units.
Connected. Alicat flow meters feature dual digital and analog communications by default and can be ordered with Ethernet/IP, EtherCAT, DeviceNet, Profibus or Modbus (RTU and TCP/IP) communications for easy integration into your digital industrial or laboratory network.
Available ranges: max 0-1000 slpm, min 0-0.5 sccm/0-500 sμlm (see Part Numbers tab for stock ranges)
Flow measurement range: 0.01% – 100% of full scale.
Standard accuracy calibration, NIST-traceable: +/- (0.8% of the reading + 0.2% of the full-scale range)
Optional high-accuracy calibration, NIST-traceable: +/- (0.4% of the reading + 0.2% of the full-scale range)
Repeatability: 0.2% of the full-scale range
Typical measurement response time constant: 5-10 ms
No warm-up time required
Operating Conditions
Compatible gases: 98 pre-loaded selectable gas calibrations; additional mixtures definable with COMPOSER
Operating temperature: -10°C to +60°C
Max internal pressure (static): 45 psig (60 psia)
Max differential pressure (inlet to outlet): 15 psid
Proof pressure: 175 psig (190 psia)
STP/NTP: user-selectable (defaults to 25°C & 1 atm STP/0°C & 1 atm NTP)
