Process Control Instruments, Field Devices and Industrial Automation
ENDRESS+HAUSER FMI21-A1D1A1 (1)
  • Overview
  • Benefits
  • Specs
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EH Liquicap FMI21 Capacitive rod probe for continuos level measurement in conductive liquids. 316L, 1.4404 or PP wetted parts. NPT 1 1/2 or G 1 1/2 Process Connection. ATEX and CSA Approvals.

Part# with Options:        FMI21-A1D1A1
Price with Options:        Please Email us your request for quote   

Options:    

Approval
(1) Approval for EH FMI21
Process Connection
(2) Process Connection for EH FMI21
Probe Length
(3) Probe Length for EH FMI21
Housing
(4) Housing for EH FMI21
Electronics & Output
(5) Electronics & Output for EH FMI21
Additional Option
(6) Additional Option for EH FMI21

  Availability 5 Days  ]

Application

The Liquicap T sensor is used in conductive liquids (as of 30 μS/cm) for continuous level measurement and is preconfigured from factory 0 %...100 % to probe length ordered.

As of a conductivity of 30 μS/cm, the measurement is independent of the dc-value (dielectric constant) of the liquid. It can also be deployed in Ex area, Zone 2.

The Liquicap T is particularly suited to the following applications:

  • Small measuring ranges (as of 150 mm)
  • Cistern measurements
  • Aggressive liquids (many acids and alkalis)
  • Independent of the tank material (plastic, stainless steel or concrete) or the tank shape

Used in conjunction with the Fieldgate FXA320 (remote measured value interrogation using Internet technology), Liquicap T is an ideal solution for inventorying

Your Benefits
  • Safe function regardless of tank geometry thanks to probe design
  • No calibration necessary (preconfigured from factory 0 %...100 % to probe length ordered)
  • High quality, non-corrosive materials (carbon fibre, stainless steel) for use in aggressive liquids and liquids which present a hazard to water (WHG-approved (German Water Resources Law))
  • No moving parts in tank - long operating life - dependable function without wear
  • Cost-effective solution for continuous measurement of levels in conductive liquids
  • Optimised storage by simply shortening the probe rods on site (probe shortening set)
Measuring principle

The probe, medium and ground rod (counter electrode) form an electric capacitor.

If the probe is in the air ➀, a certain low initial capacitance is measured.

When the tank is filled, the capacitance of the capacitor increases the more the probe is covered ➁ ➂. As of a conductivity of 30 μs/cm, the measurement does not depend on the dc-value of the liquid.

The electronic insert of the probe converts the capacitance measured to a current, in proportion to the level, in the range of 4...20 mA, thus making it possible to interpret the level.

All input and output channels are safely galvanically isolated from one another.

Measuring Principle Capacitive
Characteristic / Application Two-rod probe
Preconfigured from factory 0%...100%
High quality, non-corrosive materials (carbon fibre, stainless steel)
Suitable for aggressive liquids (many acids and alkalis)
Specialities Probe shorting kit available
Supply / Communication 10 ... 30VDC
Accuracy < 1%
Ambient temperature -40 C ... 70 C
(-40 F ... 158 F)
Process temperature -40 C ... 100 C
(-40 F ... 212 F)
Process pressure absolute / max. overpressure limit Vacuum ... 10 bar
(Vacuum ... 145 psi)
Main wetted parts Probe rods:
316L/1.4404 / PP
Option: carbon fibre PP coated
Process connection G 1
NPT 1
Sensor length Total length of probe 2.5 m
Max. measurement distance 2.5 m (8 ft)
Communication 4 ... 20 mA
Certificates / Approvals ATEX, CSA, CSA C/US
Safety approvals Overfill prevention WHG
Options Display
Application limits Changing, non-conductive media, conductivity < 3 0 μS/cm
Highly viscous liquids > 2 000 cst


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