Seametrics EX150/EX250 Insertion Magmeters

Seametrics EX150/EX250 Insertion Magmeters has no rotor to stop turning in dirty water and there are no bearings to wear out.

Seametrics EX150/EX250 Insertion Magmeters has no rotor to stop turning in dirty water and there are no bearings to wear out. Like all magmeters, when used in chemical injection applications, these meters should be installed upstream of the chemical line (or far enough downstream to allow complete mixing of fluids before the meter). Adapters mate with standard 1-1/2” (11x/21x) or 2” (15x/25x) FNPT threaded fittings such as saddles and weldolets which may be purchased either locally or from Seametrics.
A rapidly reversing magnetic field is produced in the lower housing. As the fluid moves through this field, a voltage is generated that is measured and translated into a frequency signal proportional to flow rate. This square wave signal can be sent directly to a PLC or other control or can be converted using any of the Seametrics family of indicators and converters.
A modular system of electronics can be installed directly on the flow sensor or mounted remotely. The FT430 (externally powered with pulse) and the FT440 (loop powered), both provide digital rate and total displays, as well as a programmable pulse; the FT440 also provides a 4-20 mA analog output.


  • No moving parts
  • Durable
  • Adjustable depth
  • Hot-tap available
  • Brass or stainless steel
  • Immersibility (optional)
  • Reverse flow output (optional)
  • NSF/ANSI standard 61 & 372 (stainless only)
  • Data logger (optional)
  • Sensus smart output (optional with display)


  • 3” – 48” pipe (up to 72” optional)
  • Clean or “dirty” liquids
  • Conductive liquids
  • Municipal
  • Industrial
  • Irrigation


Pipe Size 3” to 48” (up to 72” optional)
Power Full Power: 12 – 24 Vdc, 250mA                    Low Power: 12 – 24 Vdc, 40mA average with 250mA peaks
Materials Housing Powder-coated cast aluminum
Tubing/Fitting/Sensor Housing Brass or 316 Stainless Steel
Electrodes Hastelloy
Electrode Cap PVDF
O-Ring (15x/25x only) EPDM
Valve Assembly (15x/25x only) Bronze ball valve, both models (Stainless steel valve optional for stainless steel model)
Fitting Size Required 11x/21x: 1.5” FNPT                       15x/25x: 2” FNPT
Maximum Pressure 200 psi (14 bar)
Temperature Ambient 0˚ to 160˚ F (-17˚ to 72˚ C)
Fluid 32˚ to 200˚ F (0˚ to 93˚ C)
Minimum Conductivity 20 microSiemens/cm
Flow Velocity 0.28 – 20 ft/sec (0.08 – 6.09 m/sec)
Accuracy ± 1% of full scale
Output Square wave pulse, opto-isolated, 500 Hz @ 20 ft/sec

6 mA max, 30Vdc forward flow standard; reverse flow optional

Empty Pipe Detection Software, defaults to zero flow
Cable Standard 18’ (6m), #22 shielded twisted pair, 4-conn. Max. cable run at 24 Vdc = 1000’ (300m); at 12 Vdc = 500’ (150m). For other circumstances, contact the factory.
Environmental See meter mounted electronic specification for rating.
Regulatory Mark (applies to full power sensor only configuration and full power FT 430/440 mounted configurations).

Certified to NSF/ANSI standard 61 and NSF 372 (Stainless only)


Datasheet: Seametrics EX150 ,EX250 Insertion Magmeters

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