Kongsberg GLA-120/A Level Gauging Sensor

Kongsberg GLA-120/A Marine Tank Level Gauging Sensor

The Kongsberg Maritime GLA-120/A is a ruggedized marine level gauging sensor designed for continuous, high-accuracy liquid level detection across shipboard tank topologies. Engineered to interface with Kongsberg’s integrated marine automation systems (including K-Gauge, AutoChief, and DataChief engine monitoring networks), the GLA-120/A delivers reliable hydrostatic or radar-based ullage measurement under extreme offshore conditions.

This sensor eliminates signal drift caused by sea-motion sloshing, extreme thermal cycles (-25°C to +70°C), and aggressive vapor atmospheres. It operates on intrinsically safe current loops, delivering real-time analog/digital process signals directly to local Signal Processing Units (SPUs) or shipside remote I/O field stations.

Model Details:

• Model: GLA-120/A
• Manufacturer Part Number (MPN): GLA-120/A (Assembly Ref: 394333 / 481-series related)
• Condition Options: Brand New Surplus | Certified Reconditioned | Bench-Tested Marine Surplus
• Certifications Available: DNV-GL, Lloyd’s Register (LR), Bureau Veritas (BV), ABS Type Approval; ATEX/IECEx Ex ia intrinsic safety certificates; 100% bench calibration test bench reports.
• Lead Time & Shipping: In stock for same-day or next-day dispatch. Fast international express delivery via DHL Express, FedEx Priority, and air freight forwarders to any major global port/shipyard.

Features

1. Marine Class Type-Approved Integrity: Designed specifically for vessel hull and tank environments, meeting stringent DNV, LR, and ABS requirements for vibration, damp heat, and electromagnetic compatibility (EMC).
2. Intrinsically Safe Architecture (Ex ia): Safe for deployment in Zone 0, Zone 1, and Zone 2 hazardous tank spaces, ensuring compliance with SOLAS and tanker safety codes.
3. High Measurement Stability: Immune to vessel pitch, roll, surface turbulence, and aggressive tank condensates, maintaining continuous millimetric repeatability.
4. Direct K-Gauge & Alarm Integration: Native protocol and signal matching for Kongsberg K-Gauge cargo monitoring, fuel oil bunker stations, and machinery space alarms.
5. Corrosion-Proof Heavy-Duty Construction: Acid-resistant AISI 316L housing with ingress protection rated to IP66/IP67/IP68 for exposed deck and submerged tank top fittings.

Applications

• Heavy Fuel Oil (HFO), Marine Gas Oil (MGO), and Low-Sulfur Fuel Oil (VLSFO) bunker storage tanks.
• Main engine crankcase, crosshead, and stern tube lubricating oil sump systems.
• Ballast water tank monitoring, draft measurement, and trim/heel calculation systems.
• Bilge wells, sludge tanks, and waste oil holding tanks within machinery spaces.
• Slop, drain, and deck cargo service tanks on coastal and deep-sea commercial vessels.

Frequently Asked Questions

What is the difference between Kongsberg GLA-120 and GLA-120/A?

The GLA-120/A is an updated revision featuring enhanced internal transient surge suppression, modified terminal potting for improved vibration and moisture resistance, and updated internal pre-amplification compatible with the high-speed bus interfaces on K-Chief and newer K-Gauge signal processing systems.

Can the GLA-120/A be installed in explosive gas atmospheres?

Yes. The unit is designed and certified intrinsically safe (Ex ia) for deployment in Zone 0, 1, and 2 hazardous areas, provided it is wired through certified intrinsic safety barriers or connected directly to an Ex-approved Kongsberg Signal Processing Unit.

Can I install this sensor while the vessel is at sea?

Yes, provided the target tank is isolated, vented, depressurized, and gas-free. For service and expansion tanks with dedicated isolation valves or top hatches, the sensor can be exchanged at sea without interrupting other engine-room automation loops.

Are refurbished Kongsberg GLA-120/A units tested before dispatch?

Yes. Every reconditioned and surplus sensor undergoes complete mechanical inspection, solvent cleaning, insulation resistance testing, and dynamic multi-point calibration verification on a certified marine test bench before vacuum packaging and shipping.