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    Apter Power supports FD-MH50A identification, quotation and replacement planning for the installed flow-monitoring loop.

FD-MH50A

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KEYENCE FD-MH50A is a separate-amplifier electromagnetic flow sensor head for conductive water and non-corrosive fluids in the 2.5 to 50 L/min rated range.
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Technical specifications for FD-MH50A

  • Manufacturer:
    KEYENCE
  • Part Number:
    FD-MH50A
  • Product Family:
    KEYENCE
  • Product Type:
    Electromagnetic Flow Sensor Head
  • Stock:
    1
  • Measurement Method:
    Electromagnetic
  • Rated Flow Range:
    2.5 to 50 L/min
  • Display Range:
    2.5 to 100 L/min
  • Process Connection:
    Rc3/4 (20A)
  • Applicable Fluid:
    Water and non-corrosive conductive fluid
  • Minimum Conductivity:
    5 µS/cm
  • Fluid Temperature:
    0 to 85 °C
  • Enclosure Rating:
    IP67
  • Pressure Resistance:
    2.0 MPa
  • Weight:
    1.07 kg
  • Tariff Code:
    Please confirm the destination before shipping
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Process Fit Installation Flow Recovery Product Applications

Features:

  • Separate sensing head: The wetted measurement point can remain near the pipe while the matching amplifier provides indication and outputs.
  • Conductive-liquid measurement: The electromagnetic method supports water and compatible non-corrosive process fluids.
  • Serviceable process fit: The threaded connection allows a defined replacement point after safe isolation and drainage.
FD-MH50A belongs in a complete flow-monitoring loop that includes the correct amplifier, pipe arrangement and conductive process liquid.

Air pockets, an incompletely filled measuring section or unsuitable fluid can imitate a sensor fault and should be eliminated before replacement.

Commissioning compares the recovered indication with a known operating condition and checks every disturbed joint for leakage.

Apter Power can help confirm the KEYENCE FD-MH50A Electromagnetic Flow Sensor Head, amplifier match, process connection and liquid-service conditions before quotation.
KEYENCE FD-MH50A Electromagnetic Flow Sensor Head Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Liquid suitability: Confirm the process medium is conductive, non-corrosive and compatible with the wetted path.
  • Pipe condition: Choose a location that remains full and does not trap air at the measurement point.
  • Flow direction: Preserve the approved orientation and documented direction during replacement.
  • Connection match: Verify the installed Rc3/4 interface before the line is opened.
  • Safe isolation: Depressurize, drain and lock out the process before disturbing the sensor head.
  • Joint preparation: Keep sealing material and debris out of the flow passage.
  • Cable protection: Route the head lead away from sharp bends, heat and mechanical damage.
  • Leak test: Repressurize in a controlled manner and inspect every disturbed joint.
  • Unstable zero: Check pipe fill, trapped air, grounding and process movement before condemning the head.
  • Unexpected reading: Compare the amplifier setup and a known flow condition before changing calibration.
  • No indication: Separate head, cable, amplifier and power faults during diagnosis.
  • Release evidence: Retain leak-test and operating-comparison results with the maintenance record.
  • Cooling-water monitoring: Confirms flow through industrial equipment when the liquid meets the stated conditions.
  • Rinse systems: Tracks conductive wash-water delivery in repeatable process cycles.
  • Machine utilities: Supplies a defined flow signal to a matching amplifier and control system.
  • Maintenance replacement: Restores an exact head identity without changing the approved process connection.
Description
FD-MH50A provides the sensing head for a KEYENCE FD-M flow-monitoring installation, measuring conductive liquid through an Rc3/4 process connection while signal processing remains at the matching amplifier.

Successful use of FD-MH50A depends on a full pipe, adequate fluid conductivity and a mounting location that avoids entrained air or unstable flow. These process conditions matter more than a simple powered-state check.

Before replacing FD-MH50A, maintenance staff should record the amplifier identity, process connection, flow direction and commissioned zero-flow condition. The replacement is accepted only after leak testing and a comparison against a known process rate.
Alternative Names
FDMH50A FD MH50A
Technical notes
FD-MH50A is a sensor head for conductive liquid service, not a stand-alone flow controller. Isolate and drain the line before removal, confirm the matching amplifier and Rc3/4 connection, then restore flow gradually. Stop commissioning if the pipe is not full, conductivity is uncertain, leakage appears, or the displayed zero cannot stabilize.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What should a technician check before replacing FD-MH50A for a fluctuating reading?
Verify that the measuring section stays full, remove trapped air, confirm fluid conductivity and inspect the cable and amplifier. Replace the head only after those process and loop causes are excluded.
Can FD-MH50A be commissioned with an unknown amplifier already installed?
No. Record and confirm the compatible amplifier before energizing the loop; an unverified amplifier can create misleading behavior and an invalid acceptance test.
How should maintenance prove FD-MH50A after opening the process line?
Repressurize gradually, inspect the joint for leakage, establish a known flow condition and compare the indicated result before returning the loop to automatic control.
What should an engineer do if FD-MH50A will be installed where the pipe can drain empty?
Change the approved piping or mounting arrangement so the sensing section remains full. Do not compensate for an empty-pipe condition by widening software limits.
Can FD-MH50A be selected for oil or another low-conductivity liquid?
Not from appearance or connection size alone. Confirm that the actual liquid meets the published conductivity and compatibility requirements; otherwise select a suitable measurement technology.
What order information should be supplied when requesting FD-MH50A?
Provide the exact head code, connected amplifier, process medium, normal flow, connection size and any cable or mounting constraints so the replacement scope can be checked.

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