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Yokogawa Electric Corporation





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ADMAG CA Series Capacitance Magnetic Flowmeters

The ADMAG CA magnetic flowmeter adopts a system to pick up the electromotive force generated in a fluid by electrodes provided outside a ceramic pipe through the capacitance of the pipe. In addition, the flowmeter employs a prominent high-frequency excitation method that reduces flow noise in low conductivity fluid.

ADMAG CA Series Capacitance Magnetic Flowmeters

ADMAG CA Series Capacitance Magnetic Flowmeters
ADMAG CA Series Capacitance Magnetic Flowmeters logo image
ADMAG CA magnetic flowmeter is excellent at measurement in ultra-low conductivity fluids down to 0.01 microS/cm, adhesive fluids, or slurry fluids. Since ADMAG CA employs a non-wetted electrode construction, picking up the signal voltage by electrode plates provided outside a ceramic pipe through the capacitance of the pipe.
ADMAG Highlights
ADMAG CA Catalogs
ADMAG CA General Specifications
ADMAG CA User's Manual
ADMAG CA Drawings
ADMAG Handbook

Features: ADMAG CA Series Capacitance Magnetic Flowmeters

Ultra-low conductivity fluid measurement
  Capacitance type electrodes and very high impedance head amplifier of ADMAG CA make ultra-low conductive fluid measurement possible. High-frequency excitation reduces the effects of flow noise.
Adhesive fluid measurement
  Non-wetted electrodes solve the measurement problem of sticking insulating material.
Slurry fluid measurement
  Non-wetted electrodes are free from electric noise resulting from slurry colliding with the electrodes. Stable measurement in highly concentrated slurry fluids is possible.
High accuracy, +/- 0.5% of flow rate for ultra-low conductivity
  For measurement of fluids with minimum conductivity of 0.1 microS/cm.
  No adhesion, corrosion, or clogging greatly reduces maintenance costs. ADMAG CA is ideal for processes that used to need regular cleaning.
150 mm and 200 mm sizes
  ADMAG CA is the first* ceramic capacitance type magnetic flowmeter in the world that supports 150 mm and 200 mm sizes, for even greater flexibility in applications.
*: As of September 29, 1999.

Specifications: ADMAG CA Series Capacitance Magnetic Flowmeters

Size (mm)
150, 200
Excitation High frequency
Flow span (m/s) 0.5-10
Min. fluid conductivity (µS/cm)
Protection IP67, NEMA4X, JIS C0920 watertight type
Hazardous area classification
±0.5% of flowrate (0.1 µS/cm min.)
±1% of flowrate (1 µS/cm min.)
Repeatability ± 0.1% of flowrate (1 mm/s min.)
Lining material Ceramic
Electrode Construction Non-wetted plate electrodes installed on outside of ceramic tube
Fluid pressure -0.1 MPa to 4 MPa: Ceramic lining size 50 mm or smaller
-0.1 MPa to 2 MPa: Ceramic lining size 80 mm or greater
Fluid temperature -10 deg C to 120 deg C
Process connection JIS 10K/20K/F12, ANSI 150/300, DIN PN10/16: Wafer
Output signal 4-20 mA DC, pulse, or alarm (transistor contact: 30 V DC, 200 mA max.)
Function Variable damping time (1 sec min.), self-diagnostics, loop test, BRAIN communication
Indicator 7-seg. LCD
Power supply voltage 80-264 V AC/47-63 Hz or 100-130 V DC, 20.4-28.8 V DC
Maximum power consumption 14 W

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