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Our goal is to provide a variety of choices for any flow measurement application at industry leading prices.

Metal Tube Variable Area Meter


The ALVAMT rugged metal tube variable area meters (rotameters) are ideal for high pressure, high temperature and other demanding flow applications where safety is a concern. Features include: mechanical readouts for use in locations where power is not available or in hazzardous areas; analog and digital LCD local display options, multiple process connection options; several avaliable materials of construction for metering of aggressive fluids and corrosion resistance; and HART enabled 4-20mA output to provide for remote monitoring and control. The ALVAMT’s excellent repeatability makes it a good choice for batching applications. For versions without electronic output, no power supply is required. The ALVAMT’s low-pressure drop provides additional value by allowing for economical pump selection.


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  • Versatile design may be used for gas, steam, and liquids
  • High resolution and fast response time; – 5 to 50 msec
  • Wide temperature range from -40 up to 750 °F (-40 to 400 °C)
  • High pressure operation up to 6100 psi (420 bar)
  • Process connections including NPT threads, ANSI flanged, & Tri-Clamp available
  • Electronics either intrinsically safe EEx ia II CT5, or Ex proof EEx d II CT6
  • Wide array of materials available including Hastelloy B & C,Ti, Cu, Al, etc..
  • PTFE and other liner materials available
  • NIST-traceable calibration
Process Connections:ANSI, DIN, JIS, and sanitary flanges; NPT & BSP threads
Sizes:½ ~ 10″ (15 ~ 250mm)
Measuring Range:Water (70°F) – 0.04~1320 GPM (10 ~ 300,000 l/h)Air (70°F, 14.7 psia) 0.17-2650 CFM (0.3 ~ 4,500 m³/h)
Temperature:Mechanical counter: -112 to 752 °F (-80 to +400 °C)Electronic transmitter: -40 to 480 °F (-40 to +250 °C)
Pressure:½” ~ 2″ (DN15~DN50): 6100 psi (42.0MPa)3″ ~ 10″ (DN80~DN250): 580 psi (4MPa)
Accuracy:Mechanical counter: ±1.5 % of rangeElectronic transmitter: ±1.0% of range
Turn down ratio:Minimum 10:1
Viscosity:½” (DN15) <30 mPa.s1″ (DN25): <250 mPa.s2″-10″ (DN50-250): <300 mPa.s
Metering tube:316/316L SS, WNR 1.4401/1.4404 6Mo, Monel,Hastelloy C,B, Titanium Gr. II, 316 SS (dual certified) with E/TFE liningPTFE: 185°F (85°C) maxHigh Temperature (H): 575 °F (300°C)
Hazzardous approvals:Ex ia II CT1-T6Ex d II CT6
Protection:IP67, IP65/NEMA 4X
Ambient temperature:Mechanical counter: -40 to 250 °F (-40 to 120 °C)Electronic transmitter: -40 to 140 °F (40 to 60 °C)
Cable entry:M20 × 1.5, ½”G, ½”NPT, ¾”G, ¾”NPT
Display and electronics:P8 Type – Stainless steel housing , dial indicating flow valueP10 Type – 2-wire (4-20)mA / HART output, Exi or Exd and alarmsP10I Type – Mechanical indicator with Exd protection,selectable switchesP10B Type- P101 indicator with LCD display and 3.6V li
Meter Structures:Top enter or bottom enterRight enter, right exitLeft enter, left exitRight enter, left exitLeft enter, right exitBottom enter, right exitBottom enter, left exit

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