MCG 351 — Average Temperature Probe

Overview

MCG 351

For terminal operations managers, custody transfer officers, process engineers, and EPC specifiers who need reliable and precise average temperature readings for custody transfer and compliance, the MCG 351 Average Temperature Probe (ATP) provides a superior solution. Unlike single-point probes that can lead to errors from temperature stratification, the MCG 351 uses a multi-element RTD design to measure temperature at different levels, ensuring a true average reading. With its rugged stainless steel construction, flexible configuration (up to 16 elements), and intrinsically safe design, the MCG 351 is a globally accepted solution for accurate and dependable custody transfer.
MCG 351 — Average Temperature Probe

Features

True Average Accuracy

The multi-element RTD design provides a more accurate and representative temperature of the entire product, which is crucial for custody transfer integrity.

High Accuracy

Delivers a precision of ±0.45 °F (±0.25 °C) for reliable custody transfer calculations and inventory management.

Wide Temperature Range

Wide Temperature Range

Available in a standard model for service from –58 °F to +215 °F (–50 °C to +102 °C) and a high-temperature option for up to +400 °F (+204 °C), accommodating a wide range of products from chilled chemicals to hot asphalt.

Intrinsically Safe Design

When paired with the MCG 2350 Average Temperature Converter, the probe is suitable for use in hazardous, explosive environments.

Durability

Durable Construction

Features a rugged 316 stainless steel flexible hose and hermetically sealed leads to ensure a long service life and minimal maintenance in demanding environments.

Scalable

Available in configurations with 1 to 16 platinum RTD elements to accommodate tank heights from 2 ft to 82 ft.

Details

Applications

The MCG 351 is a critical tool for a range of precision applications:

Technical Specifications

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Accuracy
±0.45 °F (±0.25 °C)
Temperature Range
Standard: –58 °F to +215 °F; High-Temp Option: –58 °F to +400 °F.
Construction
316 stainless steel flexible hose, hermetically sealed leads.
Elements
1–16 platinum RTD elements, depending on tank height.
Mounting
Standard connections (3/4″ NPS, 1″ NPS, etc.) and anchor weight for vertical stability.
Safety
Intrinsically safe when used with MCG 2350 converter.

Documents and Downloads

Product Flyer

Have a look at the flyer to get all the tech specs and product features. Brochure

User Manual

Read the manual for detailed information and instructions. Manual

Calibrations

Check out a sample cert from our calibration lab. Certificate

Contact Support

If you have a question that we have not covered then just get in touch and we’ll be happy to help.

FAQs

We have tried to answer the most common questions we are asked here.

Liquids in large tanks often have temperature stratification, meaning the temperature varies at different levels. A single-point measurement can be misleading and lead to significant errors (up to ±0.5%) in volume correction and inventory calculations. The MCG 351’s multiple elements provide a true average, which is required by global standards for accurate custody transfer and compliance.

The MCG 351 is designed to work seamlessly with L&J’s gauges and transmitters. It is typically paired with the MCG 2350 Average Temperature Converter, which takes the multi-element input and provides a digital output that can be integrated with various host systems.

The MCG 351 is built with an intrinsically safe design, meaning it operates at a low-energy level that is insufficient to ignite a flammable atmosphere. When connected to the MCG 2350 converter, which contains a critical intrinsic safety barrier, the probe meets global approvals like UL, C-UL, ATEX, and CE for safe use in hazardous environments.