FMR204A High-performance Electromagnetic Flowmeter
Hitachi has identified the needs for flow measurement and has always offered up-to-date solutions. The FMR204A series of flowmeters are high-performance electromagnetic flowmeters leveraging Hitachi’s experience and expertise, which are also used for large-scale water processing facilities.
Feature
FMR204A Series High-Performance Electromagnetic Flowmeter
FMR204A features the reliability that withstands severe operating environments and high functionality that provides user convenience.
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A variety of functions is already in place
Controls for multiple ranges, flow direction, flow switch, self-diagnosis are provided as standard. Analog/total-flow pulse signals for reverse flow can be output separately using an optional control. -
Reflection switches for better operability
The infrared reflection switches allow the setting of different functions without opening the cover. -
Easy-to-read indicator
The indicator is a backlit liquid crystal display. The number of digits displayed has increased from 6 digits to 8 digits. -
Compatible with commercially available cables (model FMR204AW)
The sensor and converter are connected via a commercially available two-core cable (CVV-S). The cable length can be extended up to 1,000 m. -
An immersion-proof high performance model has been added (model FMR204AR)
An immersion proof sensor suited for installation in areas affected by temporary floods or vibration-prone sites was recently added to FMR204A lineups. -
Enhanced waterproof property (model FMR204AU)
The conventional buried-type waterproof design was enhanced and developed into a submersible type (IP68). -
Earth friendly environment adaptive product
The power consumption has been reduced compared to the conventional products. (Compared with FMR204U / FMR204AU can reduce 50%)
Lineup
Lineups and configuration examples
FMR204AW（High performance immersion proof type, Compatible with commercially available cables）
FMR204AW is a high-performance, immersion-proof flange-type* flowmeter (compatible with commercially available cables). The built-in amplifier in the sensor enables cable extension of up to 1,000 m using a commercially available two-core cable.
FMR204AR（High performance immersion proof type, Used with a dedicated cable）
FMR204AR is a high-performance, immersion-proof flange-type* flowmeter (used with a dedicated cable). The model is suited for installation in areas affected by temporary floods or vibration-prone sites.
FMR204AU（High-performance submersible type (buried type), Used with a dedicated cable）
FMR204AU is a high-performance, submersible flange-type flowmeter. The waterproof structure of the sensor is enhanced for long-term use under water.
Specification
FMR204A High-Performance Electromagnetic Flowmeter Major specifications
| Item | Description | |||
|---|---|---|---|---|
| Classification | Immersion-proof type (compatible with commercially available cables) | Immersion-proof type (used with a dedicated cable) | Submersible type (buried type) | |
| Model | Sensor | FMR204AW | FMR204AR | FMR204AU |
| Converter | EFM204AW | EFM204AU | ||
| Cable type | Commercially available cable | Dedicated cable | ||
| Piping connection | Wafer type: diameter 2.5 - 40 mm Flange type: diameter 50 - 2,600 mm |
Flange type | ||
| Diameter (mm) | 2.5、5、10、15、25、40、50、80、100、150、200、250、300、350、400、450、500、600、700、800、900、1000、1100、1200、1350、1500、1600、1800、2000、2200、2400、2600 | 50、80、100、150、200、250、300、350、400、450、500、600、700、800、900、1000、1100、1200、1350、1500、1600、1800、2000、2200、2400、2600 | ||
| Design | Sensor | IP67 (immersion proof type) | IP68 Submersible type (buried type) | |
| Converter | IP66 (water-proof type) | |||
| Flow measuring range | Minimum range 0 - 0.1 m/s, maximum range 0 - 10 m/s in terms of flow velocity (varies depending on the diameter) | |||
| Accuracy | +/-0.5% of reading (varies depending on the flow velocity and diameter) | |||
| Output signal | Flow signal | 4 - 20 mA DC, load resistance: 1 kΩ max. | ||
| Total flow pulse signal | Transistor contact (open collector) 1 pulse/h to 1,000 pulses/s | |||
| Contact signal | A combination of up to five parameters selected among multiple-range, flow direction, flow switch, self-diagnosis | |||
| Display | Instantaneous flow, total flow (backlit graphical liquid crystal display) | |||
| Optional function | (1) Reverse flow output signal (flow, total flow pulse) (2) External contact input (remote range switching, zero clamp) |
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| Fluid temperature | – 20°C to 120°C (Varies depending on the lining material, pressure etc. Non-freezing) | |||
| Ambient temperature | Sensor | – 20°C to 60°C | ||
| Converter | – 10°C to 60°C | |||
| Power supply | 100 /110 V AC, 50/60 Hz, or 24 V DC | |||
