Hydrostatic
Level measurement
Waterpilot FMX21

Waterpilot FMX21 ©Endress+Hauser
Waterpilot FMX21 ©Endress+Hauser
Waterpilot FMX21 ©Endress+Hauser
Waterpilot FMX21 ©Endress+Hauser

Pressure measuring principle

  • Waterpilot FMX21
  • Waterpilot FMX21
  • Waterpilot FMX21
  • Waterpilot FMX21

Reliable and robust level probe with ceramic measuring cell and HART

The Waterpilot FMX21 transmitter with capacitive, oil-free ceramic measuring cell is typically used in the process and environmental applications for hydrostatic level measurement. With HART output, the measuring ranges can be freely adjusted and a density-compensated level measurement can be activated. It is certified for drinking water and offers integrated temperature measurement. Versions for applications in wastewaters and sludges or usage in salt water are also available.

Additional components

  • Benefits

    • Robust overload-resistant high purity ceramic sensor (99.9% Al2O3)

    • Flexible scaling of 4 to 20mA with superimposed HART 6.0 output

    • Highest level accuracy using temperature compensated density correction

    • Simultaneous measurement of level and temperature...

  • Field of application

    Three different versions for drinking water, wastewater and sewage, saltwater.

    • Process connections: Suspension clamp, cable gland

    • Temperature: –10 to +70°C (14 to 158°F)

    • Measuring range: 0 to 20bar / 200m H20 (0 to 300psi / 600ft H2O)

    • Accuracy: ±0.2...

Features and specifications

Back

Details

  • Measuring principle

    Hydrostatic pressure

  • Characteristic

    Compact probe with ceramic cell for hydrostatic level measurement,

    Diameter = 22 mm: General applications, fresh water

    Diameter = 42 mm: Waste water applications

    Diameter = 29 mm: Salt water applications

  • Supply voltage

    10.5 ...35V DC

  • Reference Accuracy

    0.2%

    0.1% (optional)

  • Long term stability

    0.1% of URL/year

  • Process temperature

    -10°C...70°C
    (14°F...158°F)
    Diameter 29 mm (1.14"): 0°C...50°C
    (32°F...122°F)

  • Ambient temperature

    -10°C...70°C

    (14°F...158°F)

    Diameter 29 mm (1.14"):

    0°C...50°C

    (32°F...122°F)

  • Measuring cell

    100mbar...20bar
    (1.5psi...300psi)

  • Process connection

    Suspension clamp

    Cable mounting screws

  • Communication

    4...20 mA

    4...20 mA HART

  • Certificates / Approvals

    ATEX, FM, CSA, CSA C/US, IEC Ex, INMETRO, NEPSI

  • Marine approvals

    GL/ ABS/ BV/ DNV

  • Drinking water approvals

    NSF/ KTW/ ACS

  • Measuring principle

    Hydrostatic

  • Characteristic / Application

    Compact probe with ceramic cell for hydrostatic level measurement,

    Diameter = 22 mm: General applications, Fresh water

    Diameter = 42 mm: Waste water applications

    Diameter = 29 mm: Salt water applications

  • Specialities

    Automatic density compensation

    Version w/o metal parts in contact to process

  • Supply / Communication

    10.5 ...35 VDC

  • Accuracy

    0.2%

    0.1% (optional)

  • Long term stability

    0.1% of URL/year

  • Ambient temperature

    -10°C...70°C

    (14°F...158°F)

    Diameter 29 mm (1.14"):

    0°C...50°C

    (32°F...122°F)

  • Process temperature

    -10°C...70°C
    (14°F...158°F)
    Diameter 29 mm (1.14"): 0°C...50°C
    (32°F...122°F)

  • Pressure measuring range

    100 mbar...20 bar
    (1.5 psi...300 psi)

  • Main wetted parts

    Diameter 22 mm and 42 mm: Seal, 316L, Ceramic

    Diameter 29 mm: Seal, PPS, Polyolefin, Ceramic

    Extension cable: PE, PUR, FEP

  • Process connection

    Suspension clamp

    Cable mounting screws

  • Max. measurement distance

    200 m H2O
    (656 ft H2O)

  • Communication

    4...20 mA

    4...20 mA HART

  • Certificates / Approvals

    ATEX, FM, CSA, CSA C/US, IEC Ex, NEPSI

  • Marine approval

    GL/ ABS/ BV/ DNV

  • Drinking water approvals

    KTW/ NSF/ ACS

  • Options

    Absolute measuring cell

    Integrated temperature sensor Pt100, 4-wire

    customer specific adjustment

    customer specific cable marking

  • Application limits

    Measuring cell: ceramics

Documents / Manuals / Software

Accessories / Spare parts

Nr
Order code
Specification
    • Order code 52005578

      Pressure compensation Waterpilot

      Consists of: 10x teflon filter. 5x filter socket. Usage: FMX21, FMX167.

    • Order code 52008999

      Protection press.sensor Waterpilot, 5pc.

      Caps to protect the membrane. Usage: FMX21, FMX167, 22mm.

    • Order code 917755-0000

      Protection cover, PFA

      Usage: DB4x/DB5x, FMX165, FMX167/FMX21 42mm.

    • Order code 52006151

      Mounting clamp FMX21, FMX167, 316L

      Usage: FMX21, FMX167. Cable fixing (5.5-10.5mm).

    • Order code 52006153

      Additional weight FMX21, FMX167, 316L

      Heightening of sensor-weight at 300g. Several weights per probe are possible. Diameter 22mm/0.87in + 29mm/1.15in. Usage: FMX21, FMX167.

    • Order code 52008264

      Cable-mounting-screw G1-1/2, 304

      Usage: mounting FMX21, FMX167.

    • Order code 52008938

      Binding posts terminal box FMX21, FMX167

      Quadruple screw terminals for Pt100 cabeling within housing 52006152. Usage: FMX21, FMX167.

    • Order code 52009311

      Cable-mounting-screw NPT1-1/2, 304

      Usage: mounting FMX21, FMX167.

    • Order code 52011868

      Test adapter FMX21, FMX167

      Pressure admission + function test. Diameter 22mm/0.87in + 29mm/1.15in. Usage: FMX21, FMX167.

    • Order code 71222671

      Shorten.kit extension cable FMX21,FMX167

      Shortening kit for cable. Usage: FMX21, FMX167.

    • Order code 52006152

      Terminal box 120x80x55, PC

      Housing incl. screw terminals for probe connection (without Pt100), incl. compensation filter. Usage: FMX21, FMX167.

    • Order code 71325087

      HART communication resistor Ex / non Ex

      Usage: FMG50, FMR20, FMX21 with RIA15.

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