When a tank storage facility in St. Maarten needed a reliable way to prevent overfill incidents and satisfy aviation fuel storage code, they turned to L&J Technologies. The storage facility is made up of eight low pressure storage tanks containing aviation fuel levels monitored with Radar Level Gauges. Looking for a way to satisfy the code requirement for aviation fuel storage which requires an independent HLA (High Level Alarm), the Operations Manager realized that their existing radar gauges did not satisfy the redundancy he needed. For this reason, L&J Technologies suggested the L&J engineering MCG 1090 Level Alarm Probes along with an MCG 7030 Touch Panel Alarm Monitor.
The MCG 1090 Level Alarm Probes that were installed on all eight storage tanks utilize two displacers, one for high and one for high-high level alarms. These high-level alarm probes are typically mounted in difficult environments which makes regular scheduled testing challenging. To make testing easier, the MCG 1090 Level Alarm Probes each contain a solenoid to physically move the displacers as an actual level change would. By simulating the mechanical actuation that the rising liquid level would trigger, the MCG 1090 Level Alarm Probes are able to offer a truly complete self-testing capability. This self-testing capability makes scheduled testing less time consuming and increases the reliable protection available against an overfill incident.
By pairing the MCG 1090 Level Alarm Probes with the MCG 7030 Touch Panel Alarm Monitor for the redundant tank HLA system, the Operations Manager is now able to independently monitor and manage the entire system. They can schedule automatic self-checking at pre-programmed intervals, with status reporting, prior to any scheduled receiving operation and implement emergency shut-offs if necessary from the operations office which is remote from the eight storage tanks. Besides handling communications to the storage tanks, the MCG 7030 Touch Panel Alarm has a relay to energize a horn, and it also includes four other relays to perform functions for additional alarm conditions.
