MA-920 MICRO FLOWMETER is a metal tube variable area flow meter which has local indication with transmitting of minute flow rate of liquids and gases.
TOKYO KEISO's long time production know-how and recent electronics technology have been successfully combined.
The existing micro flow meters generally need a signal linearizer due to mechanical problem of very minute sensing part.
In MA-920, integrated microprocessor takes care of these automatic compensation based on individual stored calibration data and achieves high accuracy even for small flow rate.
The 4 to 20 mA with 2-wire system makes field wiring easier.
※Specifications are subject to change without prior notice.
|·||Covers very low flow rates of 0.6 to 3 L/h|
|·||2-wire 4 to 20 mA DC output|
|·||Magnetic field sensor detects the float movement with electronics to eliminate hysteresis.
High accuracy and repeatability have been achieved
|·||Easy- to- read digital LED display|
|·||No liquid dampers are needed even for gas measurement applications|
|·||Ex d IIC T6 flame proof construction suitable even for Hydrogen atmosphere|
|Measuring fluid||Liquids and Gases
Viscosity limit for liquid flow measurement (Free from solids and particles)
Meter size 1/2 Viscosity (Max.) 2.0mPa・s
Meter size 3/4、1 Viscosity (Max.) 5.0mPa・s
|Measureing range||Liquid (Water) Measuring range is subject to liquid viscosity.
Min. 0.6 to 3 L/h Max. 60 to 600 L/h
Gas (Air, 0°C, 1atm)
Min. 10 to 100 L/h（nor） Max. 2.2 to 22 m3/h（nor）
|Fluid temperature||0 - 120℃|
|Fluid pressure||Max. 2.94MPa
High pressure type19.6MPa Material of high pressure type is SUS 316.
Allowable pressure is subject to the flange rating when the connection is flange type.
Tapered tube: SUS316
PPS resin / Titanium will be used for 1/2" meter size, and PPS resin / SUS316 will be used for 3/4 and 1" meter sizes in gas measurement applications.
|Process connection||Screw (1/4, 3/8, 1/2, 3/4 or 1")
JIS10KFF flange (10A, 15A, 20A, or 25A)
Opt. NPT or other screw
Other flanges than JIS10KFF
(Indication and output)
|10 L/h or more of F.S. (water) ±2%F.S.
Less than 10 L/h of F.S. (water) ±3%F.S.
100 L/h (nor) or more of F.S. (air) ±2%F.S.
|Range ability||10：1 (Accuracy guranteed range)
Range ability of the meter with the full scale range smaller than 5L/min (water)is 10:2.
It may differ depending on the liquid viscosity.
|Output signal||4 to 20 mA DC (2-wire system)
Allowable load resistance: 600Ω or less (at 24 V DC, including wiring resistance)
(500Ω or less for ATEX-certified)
|Power source||24 V DC ±10% (Operating voltage range : 12 to 33 V DC)|
|Indication||Upper (main display): Four digits for measurements and error codes
Lower (sub display): Five digits for supplementary information
Ex d IIC T6 (TIIS-certified)
Ex d IIC T6 Gb (NEPSI-certified)
Ex d IIC T6 (KOSHA-certified)
II 2 G Ex d IIC T6...T4/
II 2 D Ex tD A21 IP65 T85°C (ATEX-certified)