ABB Magnetostrictive Level Transmitter LMT200

Magnetostrictive Level Transmitter LMT200 is a modular range of field mounted, advanced microprocessor-based electronic transmitters, utilizing multiple sensor technologies. Accurate and reliable measurement of liquid level and interface are provided in even the most difficult and hazardous industrial environments.

High accuracy non-intrusive liquid level and interface level detection

The device electronics generates a low energy current pulse at fixed intervals. The electrical pulses create a magnetic field that travels down a specialized wire inside the sensor tube. The interaction of the magnetic field around the wire and the magnetic float causes a torsional stress wave to be induced in the wire. This torsion propagates along the wire at a known velocity, from the position of the magnetic float and toward both ends of the wire.

A patented sensing element placed in the transmitter assembly converts the received mechanical torsion into an electrical return pulse. Magnetostrictive Level Transmitter LMT200 measures the elapsed time between the start and return pulses (Time of Flight) and converts it into a position measurement that is proportional to the level of the float.

Magnetostrictive Level Transmitter LMT200 Features

    • Calibrated from the factory
    • High Accuracy: .01% of Full Scale or +/- 1.27mm
    • Never Requires Re-Calibration: Set It & Forget It
    • Easy setup with waveform display
    • Not affected by agitation, foam or emulsion layers
    • No oscilloscope required
    • Designed to Mount Externally to K-TEK KM26 or other
      Magnetic Level Gauge
    • Superior Sensor (Patent #5,473,245)
    • Local Indication with HMI Display
    • Dual Compartment Housing with Separate Field Terminal
    • Loop Powered to 15.24m (50ft) Probe Length
    • Total and/or Interface Level Measurement
    • Temperature Range: -195.5 to 426.6ºC (-320 to 800ºF)
      with options
    • Field Replaceable / Upgradable Electronics Module
    • Built-in RFI / EMI Filter
    • Digital Communications
    • Online Self-verification

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  • Two Level Indications
  • Glass Viewing Window
  • 316 Stainless Steel Enclosure
  • Built-in surge protection

Specifications | Electronic Transmitter

  • Repeatability: ± 0.005% of Full Scale or 0.305 mm (0.012 in), whichever is greater
  • Non-linearity: ± 0.01% of Full Scale or 0.864 mm (0.034in), whichever is greater
  • Measuring accuracy: ± 0.01% of Full Scale or 1.27 mm (0.050 in), whichever is greater
  • Supply voltage: 12 to 42 Vdc – 4-20mA HART loop powered
  • Output/Communications: 4-20mA HART7®
  • User Interface: Interactive display, DTM, EDDL with NE107 messaging
  • Power consumption:
    4-20mA: at 36.0 Vdc – 3.6mA 0.13 watts; 21mA 0.76 watts ; at 12.0 Vdc – 3.6mA 0.043 watts; 21mA 0.25 watts
    HART mode (4.0mA): at 36.0 Vdc 0.144 watts ; at 12.0 Vdc 0.048 watts
  • Maximum line resistance:
    4-20mA: at 36.0 Vdc and 21mA, 1142 ohms* ; at 24.0 Vdc and 21mA, 571 ohms ; at 12 Vdc and 21mA, < 72 ohms**
    *Maximum allowable with HART® communication is 700 ohms
    **See the current/resistance chart
    HART mode (4.0mA): < 650 to 700 ohms
  • Polarity protection: 4-20mA, Diode in series with loop, FOUNDATION Fieldbus and Profibus PA, polarity insensitive
  • Update rate: 10 measurements per second
  • Minimum measuring span: 76.2 mm (3.0 in), consult factory if smaller span is required
  • Damping: Field Adjustable, Range: 0.1 to 60 seconds
  • Alarm output: NE43, Software or Hardware selectable. Upscale (21 mA) or Downscale (3.6 mA) Surge Suppression Integral surge suppression available with option code S1
  • Ambient temperature: -40 to 85ºC (-40 to 185ºF) Ambient
  • Humidity: 0 to 100% RH
  • Linearization: 21 Point Table Available
  • Enclosure: Dual Compartment
  • Enclosure material: Cast Low Copper Aluminum with Powder Coat or 316 Stainless Steel
  • Device tag material: AISI 316 Stainless Steel
  • Electrical connection: Two M20 x 1.5 or two 1/2in. FNPT, adapters and bus connectors also available
  • Ingress protection: IP66, NEMA 4X

Magnetostrictive Level Transmitter LMT200 Sensor Tube

  • Material:
    Standard: 316/L Stainless Steel
    Options: Alloy 20, Hastelloy® C-276, FEP-TEFLON® jacketed, electropolished 316/316L Stainless Steel, others on request
  • Standard probe length: 304.8mm to 15.24 m (1 to 50 ft); 90-degree probes (SEH Option) 304.8mm to 7.62m (1 to 25 ft)
  • Probe length tolerance:
    Standard/Options: ± 3.2mm (0.125in) up to 3.0m (10ft); +/- 6.4mm (0.25in) up to 6.0m (20ft);
    ± 9.0mm (0.35in) up to 9.0m (29.5ft); +/- 25.4mm (1.0in) up to 15.24m (50ft)
  • Mounting:
    Stainless Steel Clamps for KM26 Magnetic Level Gauge Chamber Included; Optional Vibration Isolation Mounts

Download Datasheet: ABB Magnetostrictive Level Transmitter LMT200