Starting at $1,470.71
  • Usually ships in 6-8 weeks



  • Sturdy stainless steel measuring cone
  • Operating pressure up to 44,100 psi
  • -321 to 572°F (-196 to 300°C) max operating temperature
  • Flow rates for liquids:
    • Lower limit: 0.47 gph
    • Upper limit: 26,418 gph
  • Flow rates for gases:
    • Lower limit: 0.002 scfm
    • Upper limit: 1736 scfm
  • Measuring range: 10:1
  • Accuracy: ±1.6 %
  • High application security, even with extremely small flows
  • Excellent long-term stability
  • Wide range of flange, threaded, clamp process connections
  • Resistant to extreme chemical, mechanical and thermal loads
  • All components replaceable
  • Heating jacket available for the measuring section
A completed application data form is required for this meter. Please be prepared, we will contact you about your order.


The KROHNE H250-RR sets a new standard in variable area flow meter technology. Combining a rugged, all-metal design with numerous display, communication and other options, the H250-RR is a reliable and versatile instrument ideal for measuring the flow of conductive and non-conducting liquids and gases in difficult applications and extreme environmental conditions.

The KROHNE H250-RR variable area flow meter is available in sizes from 1/2" to 4" with corresponding flow rates ranging from as low as 0.47 gph (0.026 scfm for gases) to as high 26,418 gph (1736 scfm). The basic accuracy for flow readings is an excellent ±1.6%. Due to its sturdy, all-metal construction, the H250-RR ensures high resistance to pressure, temperature and media. The modular design of the meter and indicator allows users to adapt the H250-RR to customer-specific applications including those in hazardous areas.

KROHNE H250-RR variable area flow meters operates of the float principle. Depending on the flow rate, the float will assume a certain vertical position in the tube. The float position is transmitted by a magnetic coupling system to the scale. This simple, time-tested design will ease installation time and lower maintenance demands.

The KROHNE H250-RR variable area flowmeter is available with the following indicator options:

KROHNE M9 Indicator

  • Simple, low-cost installation: Measure and display without auxiliary power supply
  • Large scale for good readability
  • 2 limit switches (NAMUR or 3-wire transistor)
  • 2-wire analog output 4 to 20mA with HART - Profibus PA interface
  • 6-digit flow counter with pulse output (non Ex)
  • Optional stainless steel housing for corrosive atmospheres
  • ATEX, FM, CSA approvals for use in hazardous areas; SIL 2 certified

KROHNE M10 Indicator

  • Digital indicator with I/O
  • 2 limit switches (NAMUR or 3-wire transistor)
  • 2-wire analog output 4 to 20mA with HART
  • 12-digit flow counter with pulse output and reset input
  • Pressure resistant, enclosed housing
  • ATEX, FM, CSA approvals for use in hazardous areas


This product can be used in the following applications:

Here's how some of our customers use this product...

High Pressure Helium

The Background: Our customer is an industrial facility that requires a means of monitoring the flow rate of high pressure helium used in plasma spraying applications.

The Problem: The sensing technologies of many types of flow meters are unable to accurately measure the flow of high pressure gases.

The Solution: We recommended the Krohne H250-RR variable area flow meter which has a rugged, all metal construction of the tube, with no ports or taps, which allows metering of very high temperature and high pressure fluids. Properly configured the H250-RR can meter fluids over 570°F or 5800PSI.