FGElectromagnetic Flow Meter
for Non-Full Water

FG Photo


An electromagnetic flow meter that measures a wide range of flow rate from non-full water to full water.
As a drainage flow meter, it is suitable for the measurement of understanding sewage usage and drainage quantity as well as reducing sewage charges.

・Measures non-full water.
・Measures from high flow rate to low flow rate with a high degree of accuracy.
・Can be installed in the middle of piping or in discharge ends depending on the situation.
・Introduces a variable sampling method that is well-equipped to handle solid object falls and flow rate changes.
・Excellent durability under severe conditions because it has no moving parts.


Detector Specifications

Model FG150B FG200B FG250B FG300B
Diameters 150mm 200mm 250mm 300mm
Flow rate range
Maximum flow rate Qmax 200 350 550 800
Maximum non-full water flow rate Qw *1 50 100 150 300
Minimum flow rate Qmin 0.2 0.35 0.55 2.00
Accumulated accuracy Up to ± 2% (Maximum flow rate)Achieves high accuracy within the reading scale (RS) tolerance in most of the extensive ranges of flow rates.
Mounting conditions Hydraulic conditions Mount in the piping of smooth and natural flow rates.Mount in the location without the impact of backwater from downstream. *2
Mounting on discharge ends Length of straight pipes Please provide straight piping of 10D or greater in upstream with the same inner diameter as the detector. *2
Mounting in the middle of piping Please provide straight piping of 10D or greater in upstream and 5D or greater in downstream with the same inner diameter as the detector. *2
Pipeline slopes *3 Horizontal mounting model 0% *4
Inclined mounting model 1 – 10% *4
Environmental conditions Measurable fluid temperature 0 to +45℃
Ambient temperature -10 to +55℃ (No freezing)
Liquid pressure 0.3 MPa or less (when full)
Conductivity 0.1 – 4.0mS/cm
Structure IPX 8 (10 days in a year in water of 10-meter depth, or 30 days in a year in water of 3-meter depth)
Other conditions
Body Unplasticized polyvinyl chloride
Electrodes and grounding ring SUS316L・SUS304
Cable One dedicated cable, 12 mm, double-line and shieldedStandard cable length is 10 meters
(It can be extended up to 100 meters using optional relay boxes.)

Transducer specifications

LCD Accumulated flow rate (m3) 9999999.9
Instantaneous flow rate (m3/h) 999.9
External output Analog output 4 – 20 mA DC
Maximum load resistance is 550 Ω or less (Instantaneous flow rate)
* Can be configured by 1 m3/h
– 4 mA when empty
– 3 mA when there is defective memory
– 2 mA in backflow (Option)
Pulse output Open-drain; Pulse unit: 0.1 m3, 1 m3 or 10 m3 (Selection)Max. 25 VDC and 20mA; ON time: 150 ms
Environmental conditions Ambient temperature and humidity -5 to + 45°C; 85% RH or less (No condensing)
Structure IP 30* Please put the meter in an outdoor panel box when installing outdoors.
Power source 100 VAC ± 10% at 50 or 60 Hz
Power consumption 20 VA or less

*1: The maximum non-full water flow rate is a boundary guide between the states of non-full water and full water.
*2: Please contact us for details.
*3: Mount the upstream straight piping and the detector coaxially.
Make sure that the piping inclination in downstream is not lower than that of upstream.
*4: Per mille (‰) is a sign indicating parts per thousand.


Dimensions of Detector

Model FG150B FG200B FG250B FG300B
L(mm) 330 390 460 470
H(mm) 322 372 425 475
φW(mm) 271 322 374 424
φD(mm) 154 202 250 298
Mass (kg) Approx. 20 Approx. 29 Approx. 40 Approx. 54

Dimensions of Transducer


・Specifications are subject to change without notice.
Product Warranties