RAMC Variable Area Flow Meter

RAMC Variable Area Flow Meter

At first glance, the instrument looks impressive with its all stainless steel design. A closer look reveals a “float blockage” detection system. Operational safety is of the utmost importance in any flowmeter, and the RAMC is no exception – wetted parts are available in a variety of materials, and intrinsically safe outputs are available as an option. If you value flexibility in a flowmeter – from the measurement of air to highly aggressive liquids – in situ replacement of the indicator without loss of performance – and the interchangeability of floats – then the RAMC is the right choice for you.

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The RAMC combines all the advantages of the variable area principle with robust design, reliable measurement, with or without power, HART, culminating in a truly universal flowmeter for gases, liquids and steam applications.

Measurement Principle

Variable-area flow meter: a float rises in a conical tube; its height corresponds to flow.

Float position is magnetically transmitted to an indicator (mechanical pointer) or electronic transmitter.

Designed for bottom-up vertical flow.

Fluid Types & Applications

Suitable for gases, liquids, and steam.

Clean fluids (low contamination) are preferred for its float design.

Can be used in demanding / harsh environments (corrosive media) — materials options.

Materials & Construction

Wetted parts standard: stainless steel.

Optional wetted materials: titanium, Hastelloy, Monel, PTFE-coated, etc.

Indicator housing: stainless steel or aluminum.

Flow Indication & Safety

Float blockage detection: can detect if float is stuck / blocked, triggering alarm via electronic transmitter.

Limit switches: supports standard or fail-safe inductive limit switches.

Can be used in safety (SIS) systems: diagnostic / proof-test provisions

Measurement Range

Wide measuring range: e.g., for water at 20 ℃: approx. 2.5 L/h to 130 000 L/h.

For air (20 °C, 1 bar): from ~75 L/h to ~1,400,000 L/h.

Viscosity compensation: there is a “viscosity-independent” range; for higher viscosities, friction on the float affects its position.

Process Connections & Sizes

DN 15 to DN 150 (½″ to 6″) for flanged versions.

Connections: flanged, threaded (NPT), etc.

Output Options / Transmitters

Mechanical pointer (no power) version available.

Electronic transmitter version (2- or 4-wire) with analog (4-20 mA) + HART (HART 5 / HART 7) protocol.

Option for SIL / safety-rated limit switches

Features

  • Very versatile — works for gases, liquids, steam.
  • Reliable and rugged — ideal for harsh industrial conditions.
  • Low power or no power option (mechanical).
  • Good for safety-critical loops (limit switches, diagnostics).
  • Flexible and upgradeable — can change scale, floats, or electronics in the field.
  • Chemical processing (especially corrosive liquids)
  • Gas flow measurement in process plants
  • Steam flow in energy systems
  • Safety loops where limit detection is needed