Cognesense - Measure, Monitor, Protect

MCG 1090

Tank farm operators, refinery engineers, chemical plant supervisors, terminal automation teams, and EPC specifiers rely on accurate, fail-safe high-level alarms to prevent spills and maintain regulatory compliance.

The MCG 1090 Level Alarm Probe delivers proven overfill protection using a true self-test mechanism that physically moves the displacer during testing. This verifies both the mechanical movement and electrical alarm signaling, ensuring the system will perform correctly during real high-level events rather than only simulated test conditions.

Designed for hazardous-area service, the MCG 1090 offers:

Remote test capability
Multiplexed communication supporting up to 128 probes
Rugged stainless steel construction for long service life

The probe can operate as a standalone alarm device or integrate with the MCG 7030 Touch Panel Alarm Monitor. Together they help facilities reduce wiring costs, simplify testing routines, and maintain dependable alarm readiness across large tank installations.

MCG 1090 Level Alarm Probe

Details

The MCG 1090 uses a durable displacer and magnetic switch mechanism to provide dependable point-level detection for:

High-level alarms
High-high-level alarms
Low-level alarms

What distinguishes the MCG 1090 from many other alarm probes is its true mechanical self-test system.

Instead of electronically simulating an alarm signal, the probe physically raises the displacer during testing, verifying:

Mechanical movement of the sensing element
Proper actuation of the switch
Integrity of the electrical alarm circuit

This ensures the entire alarm path is validated and confirms that the probe will function correctly under real process conditions.

For installations where tank access is difficult or hazardous, the probe supports remote testing when connected to the MCG 7030 Touch Panel Alarm Monitor.

In large tank farms, the system can multiplex up to 128 probes on a single Tankway communication loop, significantly reducing wiring complexity and installation cost.

The MCG 1090 integrates easily into Cognesense overfill protection platforms, combining mechanical reliability with automated testing and digital alarm monitoring.

Applications

Overfill Protection: Provides independent high or high-high level alarms for spill prevention and regulatory compliance, including API 2350 requirements.
Pump and Valve Shutdown: Provides reliable switching signals for pump shutdown or valve actuation during abnormal level conditions.
Hazardous Storage Tanks: Explosion-proof construction supports safe operation in petroleum, chemical, and regulated storage environments.
Remote-Test Installations: Allows routine alarm verification for tanks located on high platforms, remote areas, or hazardous zones.
Emergency Shutdown Systems: Can serve as an independent alarm input for high-integrity protection systems and safety instrumented functions (SIF).
Idle or Seasonal Tanks: Mechanical self-testing ensures the alarm system remains functional even after long periods without tank level movement.

2026 COST ESTIMATE

Support

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

Does the self-test verify the entire alarm path?

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Yes. The MCG 1090 physically moves the displacer during every test, confirming mechanical motion and electrical switching end-to-end—not just electronics simulation.

Can the MCG 1090 be tested remotely?

Absolutely. When paired with the MCG 7030 Touch Panel Alarm Monitor or Tankway wiring, tests can be triggered remotely from tank-side or the control room.

How many alarm probes can be multiplexed on one communication loop?

Up to 128 probes can be connected on a single Tankway loop, reducing total wiring cost and simplifying installation.

Is the probe certified for hazardous locations?

Yes. It carries UL Explosion-Proof and ATEX flameproof approvals for use in Class I, Div. 1 environments and Zone 1/2 areas.

What alarm types are supported?

Hi, Hi-Hi, and Lo alarms are available with NO/NC contact outputs or digital Tankway signaling.

What materials are available for the displacer?

Standard nylon displacers are offered, with additional materials available depending on specific gravity and chemical compatibility requirements.