ABB K-TEK AT100 Magnetostrictive Level Transmitter
Overview: Precision Level Measurement Without Recalibration
The ABB K-TEK AT100 is a high-accuracy magnetostrictive level transmitter designed for continuous liquid level and interface level measurement, providing an analog and/or digital signal for monitoring or control. Built around a patented sensor technology, the AT100 delivers level sensing resolution more than 100 times greater than a conventional reed switch type device, and is a direct-insertion, wetted transmitter suitable for almost any liquid level application, including interface measurement, compressor level, and separator level duties.
As an authorized supplier of ABB process instrumentation, Seven Star LLC sources and supplies the K-TEK AT100 level transmitter to refineries, gas processing plants, and petrochemical facilities across Oman and the wider GCC. Because the AT100 is engineered for high accuracy with no routine maintenance, Seven Star LLC helps engineering teams configure the correct probe length, float type, and protocol option for their specific tank or vessel application.
Measurement Principle
The AT100 is based upon the magnetostrictive principle: the sensing tube contains a wire that is pulsed at fixed time intervals, creating a magnetic field around the wire. The interaction of this magnetic field with the magnetic float causes a torsional stress wave to be induced in the wire, which propagates along the wire at a known velocity from the position of the magnetic float toward both ends of the wire. A patented piezo-ceramic sensing element placed in the transmitter assembly converts the received mechanical torsion into an electrical return pulse.
The microprocessor-based electronics measure the elapsed time between the start and return pulses and convert this time-of-flight measurement into a position reading proportional to the level of the float, typically output as a 4 to 20 mA signal. Because the measurement relies on the precise timing of a physical wave rather than a continuously drifting analog sensor, the AT100 is a digital transmitter with no routine calibration required, delivering high accuracy and no maintenance as two of the most common reasons customers select this technology.
Because the measurement is referenced to the position of a magnetic float rather than to any property of the liquid itself, float selection is the single most consequential configuration decision on an ABB K-TEK AT100. The float must be buoyant in the process fluid, so it is specified against the minimum expected specific gravity of that fluid; a float chosen for a heavy hydrocarbon will ride low or sink entirely in a lighter one. Interface measurement uses the same physics deliberately — a second float with a specific gravity between the two liquids rides the interface while the upper float tracks total level, allowing a single probe to report both the oil-water interface and the overall level in a separator. Dielectric constant, vapour-space composition, foam and probe coating, the variables that degrade radar and capacitance measurements, have no bearing on a magnetostrictive reading.
Engineering Design of the AT100
The AT100 supports optional ratings to 800 degrees F (427 degrees C) and 3,000 psi (207 bar), making K-TEK magnetostrictive level transmitters suitable for almost any application, from cryogenic to high-temperature process vessels. HART, Honeywell DE, and Foundation Fieldbus protocol options make the AT100 easy to connect digitally to most control systems, and re-calibration, when needed, can be performed using the module pushbuttons, a HART communicator, or a menu-driven LCD readout on units with the display option.
Explosion Proof and Intrinsically Safe approvals are available across the AT100 range, with certain option combinations (such as the F1 flexible probe or SW3 option) excluded from specific approval categories, so correct configuration selection at the ordering stage is important for hazardous-area compliance. The transmitter can also achieve SIL2 certification per IEC 61508, making it, along with the related AT200 external-mount model, one of the only magnetostrictive transmitters in the industry certified to this exacting safety standard.
Key Features
The ABB K-TEK AT100 delivers precise, low-maintenance level and interface measurement. Key characteristics include:
- Magnetostrictive sensing principle with patented piezo-ceramic sensor for high accuracy and repeatability.
- Digital transmitter design with no routine calibration required.
- Optional ratings to 800 degrees F (427 degrees C) and 3,000 psi (207 bar).
- HART, Honeywell DE, and Foundation Fieldbus protocol options for digital control system integration.
- SIL2 certification available per IEC 61508 for safety-critical level applications.
- Explosion Proof and Intrinsically Safe approval options for hazardous-area installations.
- Level sensing resolution more than 100 times greater than a conventional reed switch device.
Industrial Applications
The AT100 is deployed across refinery process vessels, gas processing separators, and petrochemical storage tanks wherever continuous, high-accuracy liquid level or interface level measurement is required, including challenging applications such as compressor level monitoring and separator interface detection. Its wide temperature and pressure rating options extend its suitability to demanding process conditions found throughout Gulf-region oil and gas infrastructure.
Seven Star LLC supports refinery instrumentation teams, gas processing operators, and petrochemical maintenance departments across Oman, Muscat, Sohar, and the broader GCC region with sourcing of ABB K-TEK level transmitters, helping projects achieve accurate, low-maintenance level measurement on their most demanding vessels.
Technical Specifications
The table below summarizes the core specifications of the ABB K-TEK AT100 Magnetostrictive Level Transmitter as supplied by Seven Star LLC.
| Parameter | Specification |
|---|---|
| Model | ABB K-TEK AT100 |
| Type | Magnetostrictive level transmitter, direct-insertion (wetted) |
| Measurement | Total and/or interface level |
| Temperature Rating (optional) | Up to 800 degrees F (427 degrees C) |
| Pressure Rating (optional) | Up to 3,000 psi (207 bar) |
| Communication Protocols | HART, Honeywell DE, Foundation Fieldbus |
| Safety Certification | SIL2 per IEC 61508 (available) |
| Hazardous Area Approvals | Explosion Proof, Intrinsically Safe (option-dependent) |
| Output | 4 to 20 mA (proportional to level) |
| Probe length (loop powered) | Up to 75 ft (22 m) |
| Wetted material | 316L stainless steel (standard) |
| Current ABB equivalent | LMT100 (AT100 is the legacy K-TEK AccuTrak model) |
Configuration, Product Status and Installation Notes
The AT100 is loop-powered over a two-wire 4 to 20 mA circuit for probe lengths up to 75 ft (22 m), which covers the great majority of vessel and tank applications without running separate power to the transmitter head. Probes and wetted parts are supplied in 316L stainless steel as standard, and the electronics are carried in a field-mountable housing with a replaceable electronics module, so a failed module can be exchanged on site without breaking the process seal or withdrawing the probe from the vessel. Installation practice is conventional but unforgiving of shortcuts: mount the probe vertically, leave overhead clearance equal to the full probe length so it can be withdrawn during maintenance, keep the float away from agitator wash and inlet turbulence or fit a stilling well, and route the signal pair away from motor and VFD cabling.
Buyers should also understand the product’s lifecycle position before committing to a large order. The ABB K-TEK AT100 is the legacy K-TEK AccuTrak model; ABB’s current-production magnetostrictive range is the LMT series, with the LMT100 as the direct in-tank equivalent. Seven Star LLC supplies the AT100 for like-for-like replacement where an existing installation, loop configuration or documented safety case must not change, and can equally quote the current LMT100 where a new project would be better served by the current platform. Confirm probe length, process connection, float specific gravity, protocol and hazardous-area certification with our instrumentation division before the order is released, because the probe and float are manufactured to the vessel and are not field-adjustable afterwards.
Request a Quote for ABB K-TEK AT100 Magnetostrictive Level Transmitter
Seven Star LLC supplies the ABB K-TEK AT100 magnetostrictive level transmitter with full manufacturer documentation and regional technical support. Contact our instrumentation division for a formal B2B quotation, to configure the correct probe length, float, and protocol for your vessel, or to obtain the complete technical datasheet. Seven Star LLC ensures every unit shipped across Oman and the GCC is genuine ABB/K-TEK hardware, correctly specified, and backed by local support.
Related Products
ABB is one of the world’s leading technology companies in electrification and automation, recognized for its commitment to innovation, reliability, and energy efficiency. With a history spanning more than a century, ABB delivers high-performance products and systems that help industries operate more intelligently and sustainably.
The company’s expertise covers a wide range of fields including power distribution, process automation, robotics, motion control, and digital solutions for smart manufacturing. ABB’s products are designed to enhance productivity, safety, and operational efficiency while reducing energy consumption and environmental impact.
Seven Star LLC supplies a complete selection of genuine ABB products, including industrial drives, PLCs, contactors, sensors, relays, and automation components, serving clients across oil & gas, energy, marine, and manufacturing sectors.
By combining ABB’s advanced engineering with Seven Star LLC’s trusted sourcing and support, customers gain access to reliable, future-ready industrial solutions built to meet the most demanding standards of modern industries.
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