magnetostrictive level transmitter / stainless steel / with digital display / 4-20 mA
AT100 ABB Measurement & Analytics



  • Technology:


  • Other characteristics:

    stainless steel, with digital display, 4-20 mA, with temperature sensor

  • Level range:

    Max.: 75'00" (22.86 m)

    Min.: 1'00" (0.3 m)

  • Process pressure:

    124.1 bar, 207 bar (1,799.92 psi)

  • Process temperature:

    Max.: 427 °C (801 °F)

    Min.: -196 °C (-321 °F)


The AT100 is Based Upon the Magnetostrictive Principle. The Sensing Tube Contains a Wire, which is Pulsed at Fixed Time Intervals and the Interaction of the Current Pulse with the Magnetic Field Created by the Magnetic Float.

This 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 Piezo-Magnetic Sensing Element Placed in the Transmitter Assembly Converts the Received Mechanical Torsion into an Electrical Return Pulse. The Microprocessor-Based Electronics Measures the Elapsed Time Between the Start and Return Pulses and Converts it into a 4-20 mA Output, which is Proportional to the Level Being Measured.


SIL2 Certified IEC 61508*
High Accuracy: .01% of Full Scale
Superior Piezo Ceramic Sensor (Patent # 5,473,245)
Local Indication with LCD Display
Never Requires Re-Calibration: Set It & Forget It
Dual Compartment Housing with Separate Field Terminal Compartment
Loop Powered to 75’ (22M) Probe Length
Total and/or Interface Level Measurement
Pressure to 3000psig (207 bar), Std. 1800 psig (124.1 bar)
Temperature Range: -320 to 800º F (-196 to 427ºC) with options
Field Replaceable / Upgradable Electronics Module
Built In RFI / EMI Filter
Digital Communications
Two Level Indications
Temperature Indications
Foundation Fieldbus Output
Honeywell DE Output
Glass Viewing Window
316L Stainless Steel Enclosure
20 Point Strapping Table

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