H250 M40, Variable Area Flow Meter
H250 M40, Variable Area Flow Meter
The H250 M40 is a variable area (VA) flow meter, or rotameter, that’s designed for flow measurement of liquids and gases in water and wastewater applications.
- modular design: from mechanical indicator to 4-20 mA, HART 7, FOUNDATION fieldbus, Profibus-PA, and totalizer
- any installation position: vertical, horizontal or in fall pipes
- flange: DN15 to DN150, 1/2 to 6″
- NPT, G, hygienic connections, etc.
- -320 to 752˚F; maximum 1000 barg / 14,500 psig
- icon / logo Security Integrity Level 2 (SIL 2)
Description
The H250 M40 is the standard variable area flow meter (VA flow meter), or rotameter, for flow measurement in municipal water and wastewater treatment applications. This variable area flow meter combines mechanical flow measurement of liquids or gases with state-of-the-art communication capabilities. This flow device is modularly extendable, so additional electronic modules can be added or replaced at any time without process interruption. In this way, its functionality adapts to new requirements – from analog flow measurement without auxiliary power to digital integration into a fieldbus system.
The H250 M40 is available in various materials and in many different versions. This sturdy all-metal flow meter can be also used in applications with high pressures (up to 1000 barg / 14500 psig), wide temperatures (-320 to 752˚F), or for aggressive media. It even allows installation in horizontal or fall pipes up to DN150 / 6″. A special version for use in hygienic applications is also available.
The H250 M40 is intrinsically safe and explosion-proof. Certain variants of this rotameter with limit switch or analog output are also suitable for use in Safety Instrumented Systems (SIS). Electronic device diagnostics and additional application diagnostics are available to increase application reliability, for example, the detection of a float blockage due to impurities or pressure surges and in the reporting of pulsating flow or gas compression oscillations of the float.
Features of the H250 M40 Variable Area Flow Meter*
- simple, low-cost installation: able to measure and also display without auxiliary power supply
- unique modularity and serviceability: limit switches, 2-wire 4-20mA, totalizer with LCD and pulse output, and also fieldbus interfaces
- NE 107 device and application diagnostics with CFM (Continuous Float Monitoring), for example, for float blockade detection
- universal ex-concept: explosion proof in addition to intrinsically safe
- various stainless steel and alloy sensor materials
- optional stainless steel housing for corrosive atmospheres
- ingress protection IP66 and IP68, IP69K optional
- NEMA4X and NEMA6
- full scale value for liquids: 5 to 32,000 GPH
- full scale value for gases: 25 to 100,000 SCFH
- turndown ratio 10:1 (optional 100:1)
- maximum measuring error: ±1.6% (according to VDI/VDE 3513-2) or ±1.5% of full scale
- suitable for use in Safety Instrumented Systems with SIL 2, in redundant design (1oo2), and also in SIL 3 applications (type A device)
- optional hygienic design for use with potable water
*Product features and options depend on device configuration. Contact us to make sure that your functionality requirements are available in a single device.
Common Water and Wastewater Applications for VA Flow Meters / Rotameters
- oxygen sparging into aeration basins
- air injection to reduce iron content
- hygienic version for use with potable water
