01

Varec 2520 ATG

High-Pressure Automatic Tank Gauge

Get a Quote ↵

Varec 2520 ATG

The Varec 2520 Automatic Tank Gauge is designed for terminal operators, refinery engineers, inventory managers, and EPC project teams who need continuous, inventory-grade level measurement on pressurized vessels without electrical infrastructure at the tank.

Unlike conventional low-pressure float gauges that rely on direct mechanical coupling, the 2520 uses a sealed magnetic drive that isolates the dial and counter from internal tank pressure, preventing vapor escape and protecting the mechanism across the rated pressure range.

Available in 150, 220, and 300 PSI variants, the 2520 supports LPG spheres and bullets, petrochemical pressurized vessels, cryogenic storage, and industrial gas applications with up to 0.2 in (4 mm) accuracy per API Chapter 3.1B.

Roof-mount and ground-level reading configurations meet routine terminal workflows, while optional IP66 enclosure and ATEX II 2G T5 (Class 1, Zone 2) approval on the 150 and 220 PSI versions extend service into hazardous areas.

Pair the 2520 with the 2920 Float & Tape Transmitter for digital output over Modbus, GPU Bi-Phase Mark, Mark/Space, and L&J Tankway, or with the 8920 Loop-Powered Transmitter for 4–20 mA integration into PLCs, DCS, RTUs, and FuelsManager®.

Varec 2520 ATG
Varec 2520 ATG
02

Features

Magnetic Drive Isolation

A sealed magnetic coupling transmits float motion to dial and counter without pressure-bearing shaft penetration, preventing vapor migration across the full rated pressure range.

Power-Free High-Pressure Operation

Fully mechanical float-and-tape operation delivers continuous measurement on pressurized vessels without gauge-head power, sustaining the record programs like EPA SPCC and API 2350 expect.

Inventory-Grade Accuracy on Pressurized Vessels

Precision to 0.2 in (4 mm) in high-pressure service, aligned with inventory-grade accuracy programs like API Chapter 3.1B rely on for petrochemical inventories.

Multiple Pressure Ratings

Supplied in 150, 220, and 300 PSI variants so tanks, spheres, and bullets match design pressure and the applicable code (ASME, PED) without over-specifying.

Ground-Level Reading Option

Optional ground-level display kits place dial or counter at grade, enabling inventory verification during walkarounds without climbing pressurized spheres or elevated bullet racks.

Digital and Analog Upgrade Paths

Accepts the 2920 FTT for digital output (Modbus, GPU Bi-Phase Mark, Mark/Space, L&J Tankway) or 8920 LPT for 4–20 mA, feeding FuelsManager® and SCADA.

Applications

  • LPG Spheres and Bullets: Continuous inventory-grade measurement on pressurized LPG and hydrocarbon vessels at refineries and gas terminals, supporting programs like EPA SPCC and API 2350 rely on.
  • Petrochemical Pressurized Vessels: Magnetic isolation maintains gauge integrity across the rated pressure range on refinery and petrochemical vessels where high internal pressures rule out conventional mechanical couplings.
  • Industrial Gas Storage: Delivers reliable, power-free level visibility on pressurized industrial gas vessels at remote or off-grid facilities where electrical infrastructure is limited or unavailable.
  • Cryogenic Liquid Facilities: Specialized installation kits support mechanical measurement performance under extreme low-temperature operating conditions across LNG and cryogenic liquid storage.
  • Bulk Gas Terminals: Grade-level reading options enable inventory verification during terminal walkarounds across elevated or pressurized vessel batteries, reducing working-at-height exposure.
  • Hazardous-Area Pressurized Storage: ATEX II 2G T5 (Class 1, Zone 2) approval on 150 and 220 PSI versions plus optional IP66 extends service into classified zones.
03

Specifications

Parameter

Specification

Accuracy

Up to 0.2 in (4 mm) per API Chapter 3.1B

Pressure Ratings

150, 220, or 300 PSI (select by tank design pressure and code)

Operating Temperature

–30 °F to +160 °F (–34 °C to +71 °C)

Measuring Range

Standard: 0–60 ft (18 m)

Display Options

Metric or imperial dial/counter; decimal or fractional

Installation Options

Roof mount or ground-level reading kits; spherical and bullet tank kits available

Magnetic Drive

Sealed coupling fully isolates indicator from tank pressure to prevent vapor escape

Power Requirements

None — fully mechanical operation

Approvals

ATEX II 2G T5 (Class 1, Zone 2) on 150 and 220 PSI versions

Environmental Protection

Optional IP66 enclosure rating

Digital Integration

2920 Float & Tape Transmitter for Modbus, GPU Bi-Phase Mark, Mark/Space, L&J Tankway

Analog Integration

8920 Loop-Powered Transmitter for 4–20 mA to PLC, DCS, RTU, and FuelsManager®

Optional Equipment

Negator Cassette, interface floats, ground-level reading kits, sphere/bullet installation kits

Contact Support
2026 COST ESTIMATE

Contact Support

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

Contact Us ↵

What accuracy does the 2520 ATG deliver on pressurized vessels?

−

The 2520 ATG provides up to 0.2 in (4 mm) accuracy per API Chapter 3.1B in pressurized service. This is the inventory-grade accuracy level that programs like API 2350 overfill prevention, stock reconciliation, and regulatory reporting on LPG and petrochemical storage rely on.

What pressure ratings are available?

+

The 2520 is supplied in 150, 220, and 300 PSI variants. Selection is based on tank design pressure, the applicable pressure vessel code (ASME, PED), and site standards. Consult your Cognesense application engineer to match the rating to the vessel.

How does the magnetic drive improve safety?

+

The magnetic drive transmits float motion to the dial and counter through a sealed magnetic coupling, with no pressure-bearing mechanical shaft penetration. This prevents vapor escape through the gauge mechanism and protects the indicator assembly from pressure-related stress — a critical safety feature on LPG and pressurized hydrocarbon storage.

Is the 2520 certified for hazardous locations?

+

Yes. The 150 and 220 PSI versions carry ATEX II 2G T5 approval (Class 1, Zone 2), and the 2520 can be supplied with an optional IP66 enclosure for additional environmental protection in classified zones.

Can the 2520 feed SCADA or FuelsManager®?

+

Yes. The 2520 accepts the 2920 Float & Tape Transmitter for digital output over Modbus, GPU Bi-Phase Mark, Mark/Space, and L&J Tankway, or the 8920 Loop-Powered Transmitter for 4–20 mA analog integration. Either transmitter connects the mechanical gauge to FuelsManager®, SCADA, RTUs, and modern PLC/DCS platforms without replacing the 2520.

Can the 2520 be read from the ground?

+

Yes. Optional ground-level reading kits place the dial or counter at grade while the float and tape assembly remains at the tank top. This is standard practice at LPG terminals where roof access to pressurized spheres is hazardous or restricted.

Does the 2520 support cryogenic service?

+

Yes. Specialized installation kits and float selections extend 2520 service to cryogenic liquids, maintaining mechanical measurement performance under extreme low-temperature operating conditions such as LNG storage.

How does the 2520 relate to the 2500 ATG?

+

The 2500 ATG covers atmospheric and low-pressure service (aluminum to ~2.5 PSI, cast iron to ~14.9 PSI) on fixed-roof, floating-roof, and low-pressure spheres. The 2520 extends the same float-and-tape approach to pressurized vessels rated 150, 220, or 300 PSI, adding magnetic drive isolation for vapor containment. Together they cover atmospheric through high-pressure bulk storage with a common mechanical platform and a shared digital integration path via the 2920 FTT or 8920 LPT.

Summary

With over a century of pressurized-storage measurement heritage, Cognesense continues to set the global standard for high-pressure tank gauging. The Varec 2520 ATG combines sealed magnetic drive isolation, fully mechanical float-and-tape operation, and API 3.1B inventory-grade accuracy across 150, 220, and 300 PSI service on LPG spheres, petrochemical vessels, and cryogenic storage — without electrical power at the vessel. The result is a safe, reliable, and audit-ready high-pressure gauge trusted wherever you need to measure, monitor, and protect what matters most.

Varec
Measure.
Monitor.
Protect.