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MCG 1500SFI

Servo Level Gauge

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MCG 1500SFI

Terminal operations managers, tank farm automation engineers, custody transfer and compliance officers, and EPCs require ultra accurate custody transfer measurement, safe calibration in hazardous environments, seamless system integration, and regulatory compliance.

The MCG 1500SFI servo gauge delivers up to ±0.4 mm accuracy, along with density and BS&W measurement and explosion proof safety. It supports ground level calibration and multiple communications protocols.

Unlike conventional servo gauges that require tank top access and frequent maintenance, the MCG 1500SFI combines ±0.4 mm precision, infrared ground level calibration, field upgradeable electronics, and multi protocol compatibility in a compact explosion proof design. Its brushless motor and minimal moving parts ensure long term reliability in demanding custody transfer, process, and storage environments.

Designed for both new installations and retrofit upgrades, the MCG 1500SFI improves operator safety, reduces maintenance requirements, and ensures audit ready accuracy for custody transfer, density, and BS&W measurement worldwide.

MCG 1500SFI
MCG 1500SFI Servo Level Gauge
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Features

Custody-Grade Precision

Provides ±0.4 mm accuracy with ±0.1 mm sensitivity, ensuring audit-ready billing and highly reliable reconciliation across custody-transfer operations.

Extreme Temperature Range

Operates from –40 °C electronics to +315 °C product temperature, enabling use with cryogenic liquids, hot asphalt, molten sulfur, and severe-service applications.

High-Pressure Capability

Supports atmospheric, 150 psi, and 300 psi ratings, allowing safe, compliant use in LPG, LNG, bullets, spheres, and pressurized process vessels.

Flexible System Integration

Offers Modbus, HART, Foundation Fieldbus, Profibus, WirelessHART, and Tankway for seamless retrofit compatibility and simplified project engineering.

Explosion-Proof Safety

Features UL, ATEX, and CE explosion-proof certification with gas-tight construction for safe operation in global Class I hazardous areas.

Low-Maintenance Design

Field serviceable brushless servo mechanism and minimal moving parts reduce mechanical wear, lowering downtime and extending long-term measurement performance.

Applications

  • Custody Transfer: Ensures fair trade and accurate reconciliation by providing ±0.4 mm measurement precision for billing, inventory control, and fiscal reporting.
  • Density Measurement: Measures fluid density using calibrated displacement, supporting regulatory compliance and product-quality verification across custody and process operations.
  • BS&W Interface Gauging: Detects product, water, and sediment interfaces with high sensitivity to prevent contamination and maintain product integrity.
  • Pressurized LPG/LNG Tanks: Optional 150 psi and 300 psi designs allow safe, accurate gauging in pressurized liquid-gas applications, including bullets and spheres.
  • Cryogenic Service: Handles extremely low-temperature products such as LNG and ethylene while maintaining stable servo-displacement performance.
  • High Value Liquids: Servos perform best in light products, refined fuels, & high-value fluids by providing mechanical stability and accurate displacement-based measurement.
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Specifications

Accuracy

≤ ±0.4 mm (±0.016 in)

Sensitivity

±0.1 mm (±0.004 in) sensitivity

Technology

Servo displacement level measurement Infrared calibration

Measuring Range

0–75 ft (22 m) standard, up to 150 ft (46 m) optional

Temperature Accuracy / Resolution

±0.5 °F (±0.3 °C) / 0.1 °F (0.06 °C)

Density Accuracy

±5 kg/m³ for custody-grade density and BS&W measurement

Display

4-line × 20-character LCD (local or optional ground-level display)

Communications

L&J Tankway standard; optional Modbus, HART, Foundation Fieldbus, Profibus, Wireless HART, and legacy system emulation

Baud Rate

Selectable 300–9600

Field Wiring

4-wire Tankway (supports up to 128 field devices per data highway)

Power Consumption

200 mA @ 110 VAC

Lightning Protection

Comprehensive surge protection

Control Options

Valve & pump control, discrete inputs/outputs, up to 4 relay dry contacts

Drum Chamber/Process Temperature

–40 °F to +600 °F (–40 °C to +315 °C)

Electronics/Ambient Temperature

–40 °F to +185 °F (–40 °C to +85 °C)

Pressure Rating

Atmospheric 25 psi standard; optional 150 psi and 300 psi versions for LPG/LNG and high-pressure tanks

Construction

Aluminum (25 lb / 11.4 kg) or Stainless Steel housing

Mounting

2″ NPT or ANSI 150#/300# flange

Certifications / Safety Approvals

UL/C-UL Explosion-Proof (Class I, Div. 1, Groups C & D; Group B optional), CENELEC / ATEX II 1/2 G EEx d IIB T6, CE compliant

Contact Support
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Contact Support

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

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What makes the MCG 1500SFI unique compared to other servo gauges?

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The MCG 1500SFI is a Smart Flash Infrared (SFI) servo gauge with a brushless design that uses only three moving parts — the drum assembly, gear assembly, and stepper motor — significantly reducing mechanical wear and maintenance compared to conventional servo gauges. Its Intelligent Scale Board (ISB) communicates with the CPU via a bi-directional infrared data link through the magnetic coupling, enabling field calibration without opening the explosion-proof housing.

How is calibration performed?

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Calibration is performed using the MCG 2150 Infrared Remote Calibrator, which is intrinsically safe and can be used in hazardous areas. All power-on functions — programming, calibration, and diagnostics — are performed through the explosion-proof housing via infrared, so the housing cover never needs to be removed in a classified location. The optional MCG 1350M Ground Level Display also supports full programming and calibration from grade level, eliminating the need to climb the tank.

Can it be used for custody transfer?

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Yes. The MCG 1500SFI delivers ≤ ±0.4 mm accuracy with ±0.1 mm sensitivity and 0.4 mm resolution, meeting the precision requirements for custody transfer measurement. It measures product level, product/water interface (BS&W), and density with custody-grade repeatability, making it suitable for fiscal metering, billing reconciliation, and inventory accounting in petroleum terminals and tank farms.

Is it compatible with existing gauging systems?

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Yes. Simple plug-in highway interface modules enable emulation of most existing field protocols and analog outputs, including Modbus (RS-485, 2-wire and 4-wire), HART, Foundation Fieldbus, Profibus DP, WirelessHART, TCP/IP, and 4–20 mA analog. This makes the MCG 1500SFI a drop-in replacement or upgrade for virtually any existing tank gauging system.

What types of tanks can it handle?

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The MCG 1500SFI is designed for atmospheric, 150 psi, and 300 psi pressure-rated tanks with a standard measuring range of 0–75 feet (22 m) and an optional range of 0–150 feet (46 m). It handles drum chamber temperatures from −40°F to +600°F (−40°C to +315°C), making it suitable for crude oil, refined products, LPG/LNG, cryogenic liquids, hot asphalt, molten sulfur, and other process fluids. Housing options include aluminum (standard) and 316 stainless steel, with flange sizes from 2″ to 10″ ANSI.

Summary

With over a century of tank gauging expertise, Cognesense delivers the MCG 1500SFI, a globally trusted servo gauge that combines custody grade precision, infrared safety, and flexible system integration in one solution.

Engineered for accuracy down to 0.4 mm, the gauge measures level, density, and BS&W even in harsh environments. Its brushless design and field upgradeable electronics reduce lifecycle costs and maintenance requirements.

Certified to UL, ATEX, and CE standards and compatible with both modern and legacy communication protocols, the MCG 1500SFI enables operators to measure, monitor, and protect their most critical storage assets safely, accurately, and efficiently.

L&J
Measure.
Monitor.
Protect.