MCG 300 — Resistance Temperature Detector

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Overview

MCG 300

Terminal operations managers, custody-transfer engineers, process engineers, and compliance officers rely on accurate product temperature data to calculate corrected volumes, manage inventory, and meet regulatory requirements. The MCG 300 delivers ±0.5 °F accuracy in a rugged stainless-steel design engineered specifically for demanding tank environments—not laboratories or controlled industrial settings.

Unlike generic RTDs, the MCG 300 is purpose-built for storage tanks of any size or configuration. Rigid elements from 12–60 inches and flexible probes up to 100 ft accommodate cone-roof, floating-roof, and deep-tank installations. Multiple calibration options—including copper, DIN platinum, and platinum-characterized copper—ensure compatibility with custody-transfer standards around the world.
A dedicated reference lead eliminates lead-wire resistance effects across long cable runs typical in tank farms, preserving accuracy and long-term measurement stability. With proven durability, broad installation flexibility, and seamless integration with gauging and inventory systems, the MCG 300 provides the trusted temperature measurement foundation required for fiscal accuracy, regulatory compliance, and reliable operations.
MCG 300 — Resistance Temperature Detector

Features

Wide Temperature Range

±0.5 °F Temperature Accuracy

Ensures reliable corrected-volume calculations for custody transfer and inventory reporting.

Reference Lead for Accuracy Preservation

Dedicated reference lead removes errors caused by long cable runs in tank farm environments.

Multiple Probe Configurations

Rigid 12–60 in probes and flexible up to 100 ft for deep or large-diameter tanks.

Infrared Calibration

Wide Calibration Compatibility

Supports copper, platinum, and characterized copper elements for compliance with global standards.

Durable Stainless-Steel Construction

Resists corrosion and harsh tank atmospheres for long service life.

System Integration

System Integration Ready

Works with gauging systems and transmitters for temperature averaging, conversions, and corrected-volume calculations.

Details

The MCG 300 is designed for accurate, stable temperature measurement across a wide range of storage, process, and custody-transfer environments.

Applications

  • Custody Transfer: Provides precision temperature data required for legal metrology, ensuring accurate volume correction and reducing billing disputes.
  • Process Control: Maintains consistent product quality by monitoring temperature variances that impact downstream processes.
  • Inventory Management: Supports shrinkage and corrected-volume calculations for daily operations and reconciliation.
  • High-Pressure Vessels: Compatible with thermowells and fittings for elevated-pressure service.
  • Floating-Roof Tanks: Probe configurations and mounting hardware maintain measurement stability as roof position changes.
  • Deep or Large Storage Tanks: Flexible sensor assemblies up to 100 ft allow temperature measurement at required depths.

Technical Specifications

Table Header Table Header
Accuracy
±0.5 °F
Construction
Stainless-steel probe (other materials available)
Probe Lengths
  • Rigid: 12″, 18″, 24″, 36″, 48″, 60″
  • Flexible: up to 100 ft
Calibrations
100 Ω Copper, 100 Ω DIN Platinum, 100 Ω “Platinum-Characterized” Copper
Thermowell Connections
Up to 1.5″ NPT or up to 3″ ANSI flange
Mounting Hardware
For cone-roof, floating-roof, and high-pressure tanks
Element Options
Single or dual element
Installation Options
Normal or spring-loaded mounting
Housing
304 stainless steel with ½” NPT connection

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.

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FAQs

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

Liquid products expand and contract with temperature changes. For accurate billing and inventory reconciliation, the volume of a product must be corrected to a standard reference temperature (often 60 °F or 15 °C). The MCG 300’s precise temperature readings ensure this volume correction is accurate, preventing costly financial disputes.

Yes. Its ±0.5 °F accuracy and compatible calibration curves make it suitable for API, ISO, OIML, and other custody-transfer measurement systems.

Yes. The MCG 300 is built with a robust stainless-steel probe, making it highly durable and resistant to corrosion. Other materials are also available to suit specific chemical applications, ensuring long-term reliability in harsh tank conditions.

The MCG 300 uses a reference lead to cancel out the resistance from the lead wires. This is a crucial feature that ensures the measured resistance is solely from the temperature-sensing element, leading to uncompromised accuracy and reducing potential errors caused by wire length or temperature fluctuations.
Cone-roof, floating-roof, fixed-roof, high-pressure, and large-volume tanks. Rigid and flexible probe options allow broad installation flexibility.