Learn about Variable Area Measuring Principles.
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Variable Area Capabilities
| Technology |
Model/
Series |
Gas Flow |
Liquid Flow |
Steam Flow |
Line Size |
Temperature |
Pressure |
Viscosity |
Accuracy |
Considerations |
| Variable Area |
ALVAMT |
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Liquids must be clean |
Variable Area Flow Meters
| ALVA Family |
| Technology |
Model |
Line Sizes |
Flow Rate |
Viscosity |
Accuracy |
Pressures |
Temperature |
Materials |
Mounting Orientations |
Outputs |
Metal Tube |
ALVAMT |
½"-8"
(8 - 400mm) |
0.01-660 GPM
(0.05 - 2,500 LPM) |
1～300 cP |
±1.5% (Std), ±2.5% w/ PTFE materials |
930 psig (64 barg) |
575 °F (300 °C) max |
304SS (Std); 316SS, PTFE, or Tantalum (Opt) |
Horizontal or vertical |
Analog 4-20 mA, 0-5 VDC, HART, swtch & open collector |
Glass Tube |
Not Available From SMC |
¼" - 3"
(6 - 80mm) |
0.05 to 264 GPM (0.005 to 1000 LPM) |
< 50 cP recommended |
±0.50% ~ ±5.0 of reading depending on make & model |
<100 psig (7 barg) |
Up to 350 °F (180 °C) max. depending on make & model |
Borosilicate, acrylic, or polycarbonate tube, Stainless Steel float, depends on make & model |
Vertical only |
Switch & open collector |