KROHNE H250-C Variable Area Flow Meter

• Maximum process temperature
  • 158°F (PTFE)
  • 482°F (ceramic)
• Flow rates for liquids:
  • Lower limit: 0.66 gph
  • Upper limit: 15,850 gph
• Flow rates for gases:
  • Lower limit: 0.011 scfm
  • Upper limit: 217 scfm
• Measuring range: 10:1
• Accuracy: ±2.5 %
• Operating pressure up to 44,100 psi
• Resistant to extreme chemical, mechanical and thermal loads
• All components replaceable
• High application security, even with extremely small flows
• Excellent long-term stability

The KROHNE H250-C variable area flow meter is an all-metal instrument designed for use with aggressive media.
With all components coming in contact with the medium available in either PTFE or ceramic, the H250-C can be
used with virtually all acids and alkalis. By including a wide range of display, communication and other options,
the H250-C is a reliable and versatile instrument ideal for measuring the flow of liquids and gases in nearly
any application or environmental condition.

KROHNE H250-C variable area flow meters are available in sizes from 1/2″ to 4″ with corresponding flow rates
ranging from as low as 0.66 gph (0.011 scfm for gases) to as high 15,850 gph (217 scfm). The basic accuracy for
flow readings is ±2.5%. Due to its sturdy, all-metal construction, the H250-C ensures high resistance to pressure,
temperature and media. The modular design of the meter and indicator allows users to adapt the H250-C to
customer-specific applications including those in hazardous areas.

The KROHNE H250-C variable area flowmeter 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-C variable area flow meter 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