RAMC Variable Area Flow Meter

At first glance the instrument looks impressive with its all stainless steel design. A closer look reveals a unique patented "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 utputs 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.

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

RAMC A1                RAMC T6


Process Connection Diameter Flanged Process Connection  Dimension " L "  (mm / inches) NPT Process Connection  Dimension " L "  (mm / inches)
1/2" 250/9.8 295 /11.6
3/4" 250/9.8 295 /11.6 
1" 250/9.8  295 /11.6 
 1 1/4" 250/9.8  295 /11.6 
 1 1/2" 250/9.8  295 /11.6 
2"  250/9.8  310 / 12.2
2 1/2" 250/9.8  325/ 12.7
3" 250/9.8  325/ 12.7
3 1/2" 250/9.8   N/A
4" 250/9.8  N/A
5" 250/9.8   N/A
6" 260/10.2  N/A
Part Standard Optional
Flanges Stainless Steel Titanium, Hastelloy, Monel
Threads NPT Stainless Steel **
Metering Tube Stainless Steel Titanium, Hastelloy, Monel, PTFE Coated
Float Stainless Steel Titanium, Hastelloy, Monel, PTFE Coated
Indicator Housing  Stainless Steel / Aluminum **
Air (60° F, 14.7 PSIG)
Max. Flow [SCFM] Connection Size Part Number  
2.5 1/2" Flanged  RMC1011 Request a Quote
5 1/2" Flanged  RMC1012 Request a Quote
8 1/2" Flanged  RMC1013 Request a Quote
13 1/2" Flanged  RMC1014 Request a Quote
25 1/2" Flanged  RMC1015 Request a Quote
32 1" Flanged  RMC1016 Request a Quote
45 1" Flanged  RMC1017 Request a Quote
70 1" Flanged  RMC1018 Request a Quote
100 2" Flanged  RMC1019 Request a Quote


Air (20° C, 1 bar abs.)
Max. Flow Nm3/h Connection Size Part Number  
2.8 1/2" Flanged  RMC2011 Request a Quote
6 1/2" Flanged  RMC2012 Request a Quote
9 1/2" Flanged  RMC2013 Request a Quote
15 1/2" Flanged  RMC2014 Request a Quote
28 1/2" Flanged  RMC2015 Request a Quote
36 1" Flanged  RMC2016 Request a Quote
55 1" Flanged  RMC2017 Request a Quote
75 1" Flanged  RMC2018 Request a Quote
110 2" Flanged  RMC2019 Request a Quote
Water (60° F, 14.7 PSIG)
Max. Flow [GPM] Connection Size Part Number  
34 GPH 1/2" Flanged RMC1001 Request a Quote
1.1 1/2" Flanged RMC1002 Request a Quote
2.2 1/2" Flanged RMC1003 Request a Quote
4 1/2" Flanged RMC1004 Request a Quote
5.5 1" Flanged RMC1005 Request a Quote
10 1" Flanged RMC1006 Request a Quote
15 1" Flanged RMC1007 Request a Quote
22 2" Flanged RMC1008 Request a Quote
38 2" Flanged RMC1009 Request a Quote


Water (20° C, 1 bar abs.)
Max. Flow [l/m] Connection Size Part Number  
2.2 1/2" Flanged  RMC2001 Request a Quote
4.2 1/2" Flanged  RMC2002 Request a Quote
8.5 1/2" Flanged  RMC2003 Request a Quote
17 1/2" Flanged  RMC2004 Request a Quote
22 1" Flanged  RMC2005 Request a Quote
38 1" Flanged  RMC2006 Request a Quote
55 1" Flanged  RMC2007 Request a Quote
85 1" Flanged  RMC2008 Request a Quote
140 2" Flanged  RMC2009 Request a Quote

Yokogawa can size and build a metal or glass Rotameter for your specific application. Whether it is a gas or liquid, extremely hot or cold for any industry you may be in. Please fill out as much information as you can on the form below and we will quickly contact you and assist with getting you the Rotameter best suited to your application.

To receive a quote, click on the link below and complete the questionnaire in the message field.

Request a Custom Application Quote


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Product Overviews

    Product Overview

    The Variable Area Flowmeter is one of the oldest and mature principles in flow measurement with its simple design: a float rises inside a conically shaped glass tube as the flow increases and its position on a scale can be read off as the flow rate.In the 1990s, Yokogawa strengthened its focus on flowmeters through cooperation with and the eventual acquisition of the German flowmeter manufacturer ROTA. In so doing Yokogawa gained access to 100 years of flowmeter expertise and completed its flowmeter portfolio by adding the Rotameter (variable area) and Rotamass (Coriolis) product lines.

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