Low Pressure Drop Gas Mass Flow Meters
Ranges of 0 to 0.5 ml/min Up to 0 to 500 l/min. Under 10ms Response Time—Field Adjustable. 130+ Gas Calibrations with Every Unit: Air, Ar, CH4, CO, CO2, Ethane, H2, He, N2, N2O, Neon, O2, Propane, Butane, Acetylene, Ethylene and more. Pressure, Temperature, and Volumetic and Mass Flow Simultaneously Displayed. No warm-up time required. NIST 5 Point Certificate Included. No Straight Runs of Pipe Required. Analog and RS232 communications included. 200:1 turndown ratio. Portable Battery Powered units (-B models). More
Item# (PN): FMA-LP1600A-series Shipping and Payment
The FMA-LP1600A Series mass and volumetric Omega's flow meters use the principle of differential pressure within a laminar flow field to determine the mass flow rate. A laminar flow element (LFD) insdie the meter forces the gas into laminar (streamlined) flow. Inside this region, the Poiseuille equation dictates that the volumetric flow rate be linearly related to the pressure drop along a fixed distance of the LFE. This, along with the viscosity of the gas, is used to accurately determine the volumetri flow rate. Separate absolute temperature and pressure sensors are incorporated and correct the volumetric flow rate to a set of standard conditions. This standardized flow rate is commonly called the mass flow rate and is reported in units such as standard cubic feet per minute (SCFM) or standard liters per minute (SLM).
Standard units include a 0 to 5 V output (4 to 20 mA optional) and RS232 communications. The gas select feature can be adjusted from the front of the keypad or via RS232 communications. Volumetric flow, mass flow, or absolute pressure, and temperature can be viewed or recorded through the RS232 connection. It is also possible to multi-drop up to 26 units on the same serial connection to a distance of 125'. These flowmeters are also available in a portable version for use in the field (-B models).
The online configurator may not contain all available options. If you do not find what you are looking for, please contact us.
SPECIFICATIONS:
Accuracy: ±(0.8% of rdg ± 0.2% FS)
Repeatability: ±0.2%
Turndown Ratio: 200:1
Response Time: 10 ms typical default response time for 63.2% of a step change. A variable register allows response time to be field adjustable via RS232 communications.
Output: 0 to 5 Vdc standard
Operating Temperature: -10 to 50°C (14 to 122°F)
Zero Shift: 0.02% FS/°C/atm
Span Shift: 0.02% FS/°C/atm
Humidity Range: 0 to 100% non-condensing
Pressure (Maximum): 50 psig
Measurable Flow Rate: 125% FS
Supply Voltage: 7 to 30 Vdc (15 to 30 Vdc for 4 to 20 mA output)
Supply Current: 40 mA typical current draw; 100 mA available supply recommended
Cable Connection: 8-pin mini DIN
Wetted Parts: 302 and 303 SS, FKM, silicone RTV, nylon 616, aluminum
Ingress Protection: IP40
-LSS (Option):316LSS, 303SS, 430FRSS, Perfluoroelastomer standard, FKM, EPDM, Buna, Neoprene
Communications: RS232 standard, RS485 (optional)
What is a mass flow meter and how does it work?
A thermal mass flow meter measures the flow rate of gas mass based on the convective heat transfer of a heated surface to the flowing fluid. The components of a basic thermal mass flow meter include two temperature sensors with an electric heater between them. The heater can protrude into the fluid stream or can be external to the pipe.
In the past, mass flow was often calculated from the outputs of a volumetric flow meter and a densitometer. Density was either directly measured, or was calculated using the outputs of process temperature and pressure transmitters...
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