Most traditional flow metering technologies, such as turbine meters or positive displacement meters, employ volumetric techniques. This means that the meter output or displayed value on the screen is in volumetric units of measure, such as GPM or LPM. There are a number of flow measurement applications that require the flow rate to be measured in mass units, including chemical mixing/batching, custody transfer, and emissions monitoring. Making use of volumetric flowmeters in these applications can prove to be challenging because converting the volumetric units to mass units requires the volumetric reading to multiplied by a media density value. For liquid fluid media, the density value changes with temperature; for gas media the density changes with both temperature and pressure. The changing density leads to inaccuracy when volumetric meters are applied in these situations. Mass Flowmeters solve this problem by providing a direct mass flow reading which is immune to changes in process temperature and pressure.
SmartMeasurement offers two Mass Flowmeter technologies. The ALCM Series of Coriolis Mass flowmeters is ideal for liquid flow measuring applications and is available for line sizes ranging from ½” through 8” and flow rates ranging from 150 to 1,000,000 kg/hr. For compressed gas applications, the ATMF line of Thermal Mass flowmeters is available in both in-line and insertion versions to accommodate line sizes ranging from ¼” to over 30”.
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| Mass Flowmeter Family | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Technology | Model | Fluids | Line Sizes | Pressure | Temperature | Process Connections | Accuracy | Outputs | Special Features | Approvals |
Coriolis mass flow
Coriolis mass flow |
ALCM family | Liquids & Gas (pending) | 0.5" ~ 8" (15mm~200mm) | 930 psi (6.8MPa) | -58~572°F (-50~ 300°C) | ANSI, DIN flanges | ±0.15% of Reading | Analog, HART Modbus Compliant RS485 RTU communications | No need for pressure & temperature input | CE - CSA/FM & ATEX pending |
Multivariable DP mass flow
Multivariable DP mass flow |
ALDPMV & Acone (primary element) | Gas, Liquid and steam | Any size allowed with primarily element meters | 5800PSI (40 MPa) | -40～256°F (–40～125℃) | Mounting brackets, thread and flange | 0.075%, 0.2%. 0.5% | Analog, HART Modbus Compliant RS485 RTU communications | Pressure & temp transmitters included | CE ExdIIBT5, ExdIICT6 ExiaIICT6 & ExibIICT6 (ATEX pending) |
Thermal mass flow meters
Thermal mass flow meters |
ATMF family Inline & insertion | Gas | > ¼" < 40" (6 ~1000mm) | 580 PSI (4.0 MPa) | IL <392°F (200°C) IS 158°F (70°C) remote | NPT threads, ANSI, DN flanges, ballvalve | ±1% of Reading,± 0.5% Full Scale | Analog, Modbus Compliant RS485 RTU communications | No need for P&T input - Standard output mass flow, no volume output | CE and CSA/FM & ATEX Zone I,II 2 G Ex d IIB+H2 T6 Gb |
Vortex mass flow
Vortex mass flow |
ALVTN family Inline & insertion | Gas and Steam | ½" ~ 24" (15 ~ 700 mm) | 980PSIG (6.8 MPa) | -30-662°F(-35-350℃) | ANSI, DIN flanges, ball valve | ±1% of Reading | Analog, Modbus Compliant RS485 RTU communications | Pressure & temperature transmitter included | UL, CSA, FM, Class I Group B, C, D, Class II Groups E, F, G |