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Motherwell MTG LATIS

Motherwell MTG LATIS combines multi-element temperature measurement with water-interface detection for bulk liquid storage tanks. It supports inventory and custody-transfer systems that need both temperature profiling and water-bottom information from one probe assembly. Request a quote for Motherwell MTG LATIS from AxFlow.

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Product features

  • Combined temperature and water-interface probe → Reduces the need for separate tank instruments and penetrations.
  • Multiple temperature elements → Provides temperature information at several heights for more representative tank data.
  • Water-interface measurement → Helps identify water accumulation beneath stored liquid products.
  • Published ±2 mm water-interface accuracy → Supports demanding inventory and custody-transfer calculations when correctly applied.
  • Copper or Pt100 temperature elements → Gives flexibility to match existing tank-gauging architecture and accuracy requirements.
  • 4–20 mA water-interface signal → Simplifies integration with established industrial monitoring systems.
  • Tank heights from 2 to 100 m → Covers a broad range of bulk-storage tank dimensions.
  • AISI 316, PTFE/FEP and Viton wetted materials → Supports compatibility with many stored liquids subject to application review.
  • Thermowell option for higher pressure → Extends the operating envelope where additional mechanical protection is required.
  • ATEX intrinsically safe configuration → Supports installation in hazardous tank areas when the certified version is specified.

Product description

Accurate tank inventory calculations depend not only on liquid level but also on product temperature and, in many hydrocarbon applications, the location of the water interface. Motherwell MTG LATIS is a combined multi-element thermometer and water-interface sensor constructed for bulk liquid storage and custody-transfer tank gauging. Combining these measurements in one suspended probe can simplify instrumentation around the tank and provide data needed for more reliable inventory calculations.

LATIS uses multiple temperature elements distributed along the probe together with an active water-interface section near the lower end. Current versions are available with copper or Pt100 temperature elements, while the water-interface signal is provided as 4–20 mA. The immersed parts use materials including AISI 316 stainless steel, PTFE/FEP and Viton to provide chemical resistance across a broad range of stored liquids.

Current Motherwell data states temperature accuracy of ±0.15 °C plus 0.002 × |t| °C and water-interface accuracy of ±2 mm or ±0.25% of active probe length. The probe is published for tank heights from 2 to 100 m, operating temperature from −20 to +80 °C and pressure up to 6 bar without a thermowell or up to 450 psi with a thermowell. ATEX intrinsically safe certification is available, but the exact element count, probe length, connection and material compatibility must be selected for the application.

For tank-farm operators, combining temperature and water-interface measurement can reduce separate penetrations and simplify the data path into the tank-gauging system. Better temperature and water-bottom information supports stock reconciliation, transfer accounting and early identification of unwanted water accumulation. AxFlow can help specify LATIS against tank height, product compatibility, process connection and integration requirements, and can support service and spare-parts planning.


MTG LATIS combines multi-element liquid temperature measurement with water-interface detection. It is intended for bulk storage and custody-transfer tank gauging applications. The measurements can be integrated into a wider tank-gauging or inventory system.
Motherwell publishes water-interface accuracy of ±2 mm or ±0.25% of the active probe length. The specified result depends on correct installation, probe selection and the properties of the stored liquids. Application conditions should therefore be reviewed before final specification.
Current Motherwell data lists tank heights from 2 to 100 m. The probe and cable arrangement must still be selected to suit the actual tank geometry. AxFlow can help define the required length and process connection.
Motherwell publishes an ATEX intrinsically safe LATIS configuration. The complete installation must use the appropriate certified electrical arrangement and barriers. Hazardous-area classification should be confirmed before ordering.
Selection should consider tank height, product chemistry, required temperature elements, water-interface range, pressure and hazardous-area classification. Process connection and system integration must also match the existing tank-gauging architecture. Contact AxFlow for product selection and availability.
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