Cognesense - Measure, Monitor, Protect

MCG 2350

Terminal operators, custody transfer officers, automation engineers, and EPC specifiers require accurate product temperature averaging to support inventory management and regulatory compliance.

The MCG 2350 Average Temperature Converter is a dedicated, microprocessor-based solution engineered specifically for storage tank environments.

By multiplexing inputs from an average temperature probe containing up to 14 RTD elements, the MCG 2350 calculates a true representative average temperature. This eliminates measurement errors caused by temperature stratification and enables accurate corrected-volume and mass calculations.

The device includes a built-in intrinsic safety barrier, allowing direct connection to both explosion-proof and intrinsically safe probes without requiring external barriers.

Unlike single-point temperature devices or generic transmitters, the MCG 2350 provides:

Custody-grade temperature accuracy
High-resolution digital processing
Seamless integration with L&J radar, servo, and encoder gauges

With UL, C-UL, and ATEX/CENELEC approvals, the converter supports globally compliant operation while delivering the precision and reliability required for audit-ready custody transfer and automated tank-farm measurement systems.

MCG 2350 Average Temperature Converter

Details

How It Works

The MCG 2350 continuously scans and multiplexes the RTD elements within an average temperature probe, supporting up to fourteen sensors along the probe length.

The converter determines which RTD elements are submerged in the product and includes only those readings in the calculated temperature average. Using high-resolution digital processing, it produces a true representative product temperature aligned with API MPMS methods for temperature averaging.

This approach eliminates stratification bias that occurs when relying on single-point temperature sensors and ensures accurate corrected-volume and mass calculations required for:

Custody transfer
Inventory reconciliation
Loss control programs

The converter’s internal intrinsic safety barrier allows direct connection to explosion-proof or intrinsically safe probes, simplifying installation in hazardous environments.

When paired with L&J radar or servo gauges, the MCG 2350 becomes part of an integrated custody-measurement platform that synchronizes level, temperature, and density measurements across tank farm systems.

Applications

Custody Transfer Tanks: Provides accurate average temperature measurements for corrected volume calculations, reducing buyer-seller discrepancies and supporting audit-ready custody transfer.
Petroleum Storage Terminals: Eliminates stratification errors in large storage tanks, improving inventory accuracy and reducing reconciliation adjustments.
Chemical Storage Operations: Provides precise temperature data for products where small thermal changes affect density, quality, or chemical behavior.
Automated Tank Farm Systems: Supplies standardized analog and digital outputs for integration with SCADA, DCS, and tank management systems.
Refined Product Blending and Distribution: Maintains accurate averaging in tanks containing multiple fuel layers or additives used in blending operations.
High-Accuracy Mass or Density Calculations: Supports advanced measurement systems that require precise temperature input for volumetric, mass, or density correction calculations.

Technical Specifications

Parameter

Specification

Inputs

Up to 14 RTDs (Pt-100, 4-wire)

Outputs / Protocols

4–20 mA, HART, Modbus, Tankway, proprietary gauge interface

Accuracy

±0.1 °C (RTD dependent)

Temperature Range

–200 °C to +250 °C (probe dependent)

Power Supply

Loop powered or 24 VDC external

Construction

NEMA 4X / IP66 enclosure; aluminum or stainless steel housing

Mounting

Field mount or rack mount configurations

Integration

Compatible with MCG 300 RTDs, MCG 350/351 temperature probes, MCG 1600SFI radar, MCG 1500SFI servo, and MCG 2000MAX transmitter

Certifications

UL, C-UL, ATEX / CENELEC

2026 COST ESTIMATE

Support

If you have questions not covered here, please contact support for assistance.

Why can't a single-point temperature sensor be used in large storage tanks?

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In large storage tanks, liquids often experience thermal stratification, meaning the temperature varies significantly from the top to the bottom. Relying on a single-point sensor can lead to volumetric errors of up to in inventory calculations, which is unacceptable for custody transfer. The MCG 2350’s multi-point averaging eliminates this bias.

Does the MCG 2350 meet international custody transfer standards?

Yes. The MCG 2350 is specifically designed to meet or exceed the requirements set by key international standards bodies, including API, ISO, and OIML, ensuring your temperature data is audit-ready and globally compliant.

What are the benefits of integrating the MCG 2350 with L&J gauges?

Direct integration allows the entire gauging system (level and temperature) to function as a unified custody-transfer solution. The MCG 2350 provides the necessary temperature correction data directly to the gauge or host system, simplifying the architecture and ensuring the final volume or mass calculation is based on the most accurate data possible.

What temperature probes are compatible with the converter?

It directly integrates with MCG 300 RTDs and MCG 351 average temperature probes, as well as other compatible L&J temperature devices.

How is the MCG 2350 different from a standard temperature transmitter?

It performs true multi-point averaging from up to fourteen RTDs, eliminating stratification errors and ensuring custody-grade accuracy.

Can the converter be used in hazardous areas?

Yes. The housing is explosion-proof, and the internal intrinsic safety barrier supports connection to IS or XP probes.

Is the device suitable for retrofit installations?

Absolutely. Its flexible mounting options, communication protocols, and universal RTD compatibility make it ideal for both new and existing installations.