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Kongsberg Dual Sensor Converter | GLB-7B/7A-SPARE-B | Marine Level Monitoring

Kongsberg GLB-7B/7A-SPARE-B dual sensor converter, for marine cargo tank high level alarm systems, interfaces and processes GL-7A/GL-7B capacitive level switch dual sensor signals, 24VDC supply, 4-20mA output (normal 8mA/alarm >12mA), IP67, DNV/ABS/BV/LR approved, IECEx explosion-proof, made by Kongsberg Maritime Norway. Order available.

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Product Details

1. Product Overview

The Kongsberg GLB-7B/7A-SPARE-B is a Dual Sensor Converter manufactured by Kongsberg Maritime of Norway (under the Autronica brand), used in marine cargo tank level monitoring and high level alarm systems. It interfaces and processes dual sensor signals from GL-7A/GL-7B series capacitive level switches, converting the capacitive level detection signals into standard 4-20mA current output signals for reception and processing by the ship's alarm monitoring system (such as Kongsberg/Autronica fire alarm systems, cargo monitoring systems).

On chemical tankers, product tankers, LPG carriers, and other liquid cargo vessels, cargo tank high level monitoring and overfill alarm systems are critical for ship safety. The International Maritime Organization (IMO) and classification societies (DNV, ABS, BV, LR, etc.) require cargo tanks to be equipped with high level alarm and overfill protection systems to prevent overloading during loading that could lead to spillage and environmental pollution. Capacitive level switches are a commonly used level detection device that determines whether the liquid level has reached a set alarm height by detecting the capacitance change between the probe rod and the tank wall. The function of the dual sensor converter is to process and convert signals from two capacitive level sensors (typically one for high level alarm and one for high-high level/overfill alarm, or for dual tank redundant monitoring), outputting standard signals for the ship's alarm system.

The GLB-7B/7A-SPARE-B serves as a spare part model (SPARE-B), used to replace faulty or aging dual sensor converters in the ship's level monitoring system, ensuring continuous and reliable system operation. During long-term ship operation, electronic equipment may age or fail due to environmental factors such as humidity, salt spray, vibration, and temperature changes. Timely spare part replacement is an important measure to ensure ship safety and meet classification society survey requirements.

The 配套 GL-7B Marine High Level Alarm Switch is a mature product from Kongsberg Maritime, adopting capacitive measurement principle. The probe rod is made of acid-resistant steel AISI316L, and the sensor element is made of PTFE or PEEK, suitable for various cargo media (including corrosive chemicals). The technical parameters of the GL-7B level switch include: power supply 24VDC (10~28V), output signal 4-20mA (normal state 8mA, alarm state >12mA), measurement accuracy ±1.0cm, protection degree IP67, operating temperature -45°C~+85°C (T4) / +70°C (T5), IECEx explosion-proof certification and DNV/ABS/BV/LR classification society approval, 2-wire connection (2.5mm² cable).

The GLB-7B/7A-SPARE-B dual sensor converter adopts industrial-grade design, adapting to harsh marine environments (humidity, salt spray, vibration, temperature changes), with compact structure and convenient installation and maintenance. The converter weighs approximately 230g (reference), with dimensions approximately 11×11×4cm (reference, subject to actual product). The product has passed multiple classification society approvals and explosion-proof certifications, meeting the requirements of IMO conventions and classification society regulations, and can be safely used in hazardous areas (such as cargo tank decks where explosive gases may be present).

This dual sensor converter is widely used in the following marine and offshore applications: chemical tanker cargo tank high level alarm, product tanker cargo tank level monitoring, LPG carrier cargo tank overfill protection, crude oil tanker level monitoring, bulk carrier ballast tank level monitoring, offshore platform storage tank level monitoring, FPSO (Floating Production Storage and Offloading) cargo tank monitoring, LNG carrier related level monitoring, and other vessels and offshore facilities requiring cargo tank high level alarm and overfill protection.

Note: This product GLB-7B/7A-SPARE-B is a Kongsberg Maritime dual sensor converter spare part. Among the above technical parameters, the parameters of the 配套 GL-7B level switch are from Kongsberg Maritime official product page. The detailed electrical parameters of the converter itself (such as input impedance, output load capability, response time, internal circuit principle, etc.) are limited in public information, specific subject to Kongsberg official technical documentation; Contact via email for confirmation. Installation and wiring must be performed by professional engineers with marine electrical operation qualifications, strictly following Kongsberg installation manual and marine electrical safety operation procedures. After wiring completion, functional tests and alarm trials should be performed to ensure the level alarm system works properly. When used in hazardous areas, it must be confirmed that the explosion-proof certification matches the on-site hazardous area classification.

2. Specifications

表格

Parameter	Value
Brand	Kongsberg Maritime (Norway, under Autronica brand)
Product Series	GLB series dual sensor converters
Model	GLB-7B/7A-SPARE-B
Product Type	Dual Sensor Converter, spare part model
Application	Marine cargo tank level monitoring and high level alarm system, interfacing GL-7A/GL-7B capacitive level switch signals
Compatible Sensors	GL-7A / GL-7B capacitive level switches (high level alarm switches)
Sensor Measurement Principle	Capacitive
Input Channels	Dual sensor input (2 channels)
Power Supply Voltage	24VDC (10~28VDC, reference GL-7B parameters, subject to converter official documentation)
Output Signal	4~20mA (normal state 8mA, alarm state >12mA, reference GL-7B parameters)
Output Method	2-wire (reference, subject to official documentation)
Measurement Accuracy	±1.0cm (GL-7B level switch accuracy)
Protection Degree	IP67 (housing, reference GL-7B parameters)
Explosion-proof Certification	IECEx (IECEx TUN 13.0030X, reference GL-7B parameters)
Classification Society Approval	DNV, ABS, BV, LR (reference GL-7B parameters)
EMC Certification	IACS E10 (reference)
Operating Temperature	-45°C ~ +85°C (T4) / +70°C (T5, reference GL-7B parameters)
Storage Temperature	Contact via email (subject to Kongsberg official documentation)
Relative Humidity	Contact via email (subject to Kongsberg official documentation)
Vibration Resistance	Contact via email (marine grade, subject to official documentation)
Shock Resistance	Contact via email (marine grade, subject to official documentation)
Sensor Probe Material	Acid-resistant steel AISI316L (GL-7B level switch)
Sensor Element Material	PTFE or PEEK (GL-7B level switch)
Converter Housing Material	Contact via email (subject to Kongsberg official documentation)
Wiring Method	2-wire, 2.5mm² cable (reference GL-7B parameters)
Cable Specification	Ø8~20mm (reference)
Converter Weight	Approximately 230g (reference, subject to actual product)
Converter Dimensions	Approximately 11×11×4cm (reference, subject to actual product)
Sensor Weight	Depends on sensor length (e.g. 1m dual sensor approx. 10kg)
Mounting Method	Bulkhead or platform mounting (Contact via email for confirmation)
Applicable Vessel Types	Chemical tanker, product tanker, LPG carrier, crude oil tanker, bulk carrier, offshore platform, FPSO, etc.
Applicable Media	Various cargo media (including corrosive chemicals, depending on sensor element material selection)
Spare Part Type	SPARE-B (Spare part version B)
Replacement/Compatibility	Compatible with GL-7A/GL-7B level switch systems
Origin	Norway (Kongsberg Maritime, subject to official label)
Minimum Order Quantity	1 unit
HS Code	Contact via email (reference 8543 or 9032)
Stock Status	Order available
Warranty	12 months

5. Model Explanation

Model: GLB-7B/7A-SPARE-B

Product Description: Kongsberg Maritime dual sensor converter spare part, for marine cargo tank high level alarm systems, interfaces and processes GL-7A/GL-7B capacitive level switch dual sensor signals, 24VDC supply, 4-20mA output (normal 8mA/alarm >12mA), IP67, DNV/ABS/BV/LR approved, IECEx explosion-proof, made in Norway

GLB-7B/7A-SPARE-B Configuration Overview:

GLB = Kongsberg Maritime level switch/converter product series identifier
7B = Compatible with GL-7B high level alarm switch series
7A = Compatible with GL-7A level switch series
SPARE = Spare part model
B = Spare part version identifier (Version B)
Product type: Dual Sensor Converter
Input: Dual GL-7A/GL-7B capacitive level switch signals
Output: 4~20mA standard signal
Power supply: 24VDC
Certifications: IECEx explosion-proof, DNV/ABS/BV/LR classification societies
Origin: Norway

Note: The meanings of each segment in the above model are inferred based on Kongsberg product naming system. Specific naming rules and configuration are subject to Kongsberg Maritime official technical documentation; Contact via email for confirmation.

Kongsberg Level Monitoring System Related Products (ordered separately, Contact via email):

表格

Product Model	Product Name	Description
GL-7B	Marine High Level Alarm Switch	Capacitive, 24VDC, 4-20mA output, IP67, IECEx
GL-7A	Level Switch	Capacitive level sensor
GLB-7A	Dual Sensor Converter	Interfaces GL-7A level switches
GLB-7B/7A-SPARE-B	Dual Sensor Converter Spare Part	This product
INS-GLB-7B_SPAREA	GLB-7B Installation Kit	Installation accessories
GLN-7B/7A-SPAREB	Dual Sensor Converter (another version)	Similar product

Official Documentation Reference:

Kongsberg Maritime GL-7B Marine High Level Alarm Switch official product page
Kongsberg Maritime GLB series Dual Sensor Converter technical data sheet
Kongsberg Maritime cargo tank level monitoring system installation and operation manual
IECEx explosion-proof certificate (IECEx TUN 13.0030X)
DNV / ABS / BV / LR classification society type approval certificates

6. Why Choose Us

Professional Procurement, Genuine Kongsberg Quality Guaranteed — All Kongsberg Maritime marine automation spare parts obtained through professional procurement channels, ensuring genuine Kongsberg original products, with product identification, factory inspection certificates, and technical documentation, 12-month quality warranty. Pre-shipment appearance inspection, model confirmation, and packaging check performed.
Worldwide Delivery, Professional Marine Spare Parts Logistics — DHL/FedEx/UPS international courier and sea/air freight available, global delivery available, can be delivered directly to ship ports or ship agents. Marine electronic spare parts use shock-proof moisture-proof rust-proof professional packaging (anti-static bag + foam cushioning + desiccant + corrugated box), ensuring safe transport. Expedited logistics and customs clearance available, delivery to 200+ countries, meeting urgent ship repair and spare part needs.
Professional Technical Support, Marine Level System Full-process Service — Dual sensor converter selection consultation (confirming level switch model, sensor quantity, tank type, media type, alarm height, output signal requirements, classification society requirements), installation guidance (bulkhead/platform mounting specifications, sensor probe installation, converter wiring, 2-wire connection, cable specification selection, grounding requirements), system commissioning (level alarm function test, 4-20mA output calibration, alarm threshold setting, integration with ship alarm system, functional trial), fault analysis (no output troubleshooting, signal drift diagnosis, false alarm/missed alarm analysis, sensor fault judgment, converter fault troubleshooting, cable fault detection, spare parts replacement guidance), and marine level monitoring system spare parts list review, helping users correctly select, install, commission, and maintain marine level alarm systems.
Flexible Procurement, Marine Project Bulk and Spare Parts Framework Agreements — Single unit and bulk project orders, tiered discounts. Complete marine level monitoring system package solutions available (converter + level switch + installation kit + cable + junction box + technical service combination) and annual spare parts framework agreements, helping ship owners and ship management companies optimize procurement cost, ensure spare parts supply, and meet classification society survey requirements. Customized quotations and long-term cooperation solutions available for chemical tankers, product tankers, LPG carriers, crude oil tankers, bulk carriers, offshore platforms, FPSOs, and other vessel types.
Pre-shipment Verification, Test Report Available — Appearance, packaging, model checks before shipment; converter test report available if necessary (appearance inspection, model and silkscreen verification, power-on test, input/output signal test, 4-20mA output calibration, insulation resistance test, packaging check, accessory inventory), ensuring delivered product in good condition, parameters qualified. For urgent project needs (urgent marine spare part replacement, classification society survey rectification, ship docking maintenance, system modification and upgrade), priority inventory coordination and expedited shipping available.

7. Frequently Asked Questions (FAQ)

Q1: What is Kongsberg GLB-7B/7A-SPARE-B? What are the main parameters?

A: Kongsberg GLB-7B/7A-SPARE-B is a Dual Sensor Converter spare part manufactured by Kongsberg Maritime of Norway (under the Autronica brand), used in marine cargo tank level monitoring and high level alarm systems. It interfaces and processes dual sensor signals from GL-7A/GL-7B series capacitive level switches, converting capacitive level detection signals into standard 4-20mA current output signals for the ship's alarm monitoring system.

Core parameters: Brand Kongsberg Maritime, model GLB-7B/7A-SPARE-B, product type Dual Sensor Converter (spare part), application marine cargo tank high level alarm system, input dual GL-7A/GL-7B capacitive level switch signals, output 4~20mA (normal 8mA, alarm >12mA, reference), power supply 24VDC (10~28VDC, reference), 2-wire connection, measurement accuracy ±1.0cm (GL-7B level switch), protection degree IP67 (reference), explosion-proof certification IECEx (reference), classification society approval DNV/ABS/BV/LR (reference), operating temperature -45°C~+85°C (T4, reference), sensor material AISI316L probe with PTFE/PEEK element, converter weight approx. 230g (reference), origin Norway (reference).

Main applications: Chemical tanker cargo tank high level alarm, product tanker cargo tank level monitoring, LPG carrier cargo tank overfill protection, crude oil tanker level monitoring, bulk carrier ballast tank level monitoring, offshore platform storage tank level monitoring, FPSO cargo tank monitoring, other vessels and offshore facilities requiring cargo tank high level alarm.

Note: This product is a spare part model (SPARE-B), used to replace faulty dual sensor converters in marine level monitoring systems. The detailed electrical parameters of the converter itself are limited in public information, specific subject to Kongsberg official technical documentation; Contact via email for confirmation. Installation and wiring must be performed by professional engineers with marine electrical operation qualifications, and functional tests and alarm trials should be performed after wiring completion.

Q2: How does a capacitive level switch work? How is it different from other level switches?

A: A capacitive level switch is a level detection device based on the principle of capacitance change, widely used in marine cargo tank high level alarms and industrial level monitoring.

Capacitive level switch working principle: The capacitive level switch consists of a metal probe rod (inner electrode) and the container wall (outer electrode), forming a capacitor. When the liquid level is below the probe position, the medium between the probe and container wall is air or gas, with a small capacitance value. When the liquid level rises to contact the probe, the medium between the probe and container wall is replaced by liquid. Since the dielectric constant of liquid is much greater than air, the capacitance value increases significantly. The converter circuit detects the change in capacitance value. When the capacitance value exceeds the set threshold, it determines that the liquid level has reached the alarm height and outputs an alarm signal. For non-conductive liquids (such as oils, chemicals), the probe is usually coated with PTFE or PEEK insulation, forming a coaxial capacitor structure, where level change alters the capacitance value.

Capacitive level switch advantages: 1. No moving parts — no floats, baffles, or other mechanical moving parts, high reliability, long life, not prone to jamming. 2. Good corrosion resistance — probe can be AISI316L stainless steel coated with PTFE/PEEK, suitable for corrosive chemicals. 3. Wide media applicability — can be used for conductive and non-conductive liquids (oils, chemicals, liquefied gas, etc.). 4. Pressure and temperature resistant — can be used in high pressure, high temperature, or low temperature applications (such as LPG carrier low temperature cargo tanks). 5. Good explosion-proof performance — can be designed as intrinsically safe, suitable for explosive hazardous areas. 6. Easy installation — usually installed vertically from tank top, compact structure. 7. High accuracy — alarm point accuracy up to ±1cm.

Comparison with other level switches: Float type — simple principle, low cost, but has moving parts prone to jamming, not suitable for viscous/corrosive media, float may leak. Ultrasonic type — non-contact, no moving parts, but affected by foam/steam/dust, tank internal structures may interfere, higher cost. Radar type — non-contact, high accuracy, suitable for complex media, but high cost, tank internal structures may interfere. Hydrostatic type — continuous level measurement, but affected by media density changes, requires tank bottom installation. Conductive type — simple principle, low cost, but only for conductive liquids, electrodes prone to corrosion and scaling.

Why choose capacitive level switches for marine cargo tanks: Wide variety of cargo types (oils, chemicals, liquefied gas) with varying dielectric constants — capacitive can be calibrated for different media. Cargo may be corrosive — requires PTFE/PEEK coating and 316L stainless steel. Cargo tanks are hazardous areas — requires intrinsically safe explosion-proof design. Marine environment has high vibration — no-moving-part capacitive is more reliable. Tank top installation is convenient, no need for tank bottom openings. Meets IMO and classification society requirements for high level alarms.

Kongsberg GL-7B high level alarm switch adopts capacitive measurement principle, AISI316L probe, PTFE/PEEK sensor element, suitable for various cargo media, with IECEx explosion-proof certification and DNV/ABS/BV/LR classification society approval. It is a mature product for marine cargo tank high level alarms. The GLB-7B/7A-SPARE-B dual sensor converter is used to interface and process GL-7B level switch signals. To confirm selection, please provide cargo media type, tank type, alarm height, media temperature, classification society requirements, etc.; Contact via email.

Q3: What are the regulatory and classification society requirements for marine cargo tank high level alarm systems?

A: Marine cargo tank high level alarm and overfill protection systems are strictly required by International Maritime Organization (IMO) conventions and classification society regulations, and are critical systems for ensuring ship safety and preventing marine pollution.

Main international regulatory requirements:

MARPOL Convention (International Convention for the Prevention of Pollution from Ships):
- Annex I (Prevention of Pollution by Oil): Requires oil tankers to be equipped with cargo oil tank high level alarm and overfill control devices
- Annex II (Control of Pollution by Noxious Liquid Substances in Bulk): Requires chemical tankers to be equipped with cargo tank high level alarms
- High level alarm should 发出 audible and visual alarm when cargo reaches 95% of tank capacity
- Overfill control device should automatically stop loading or trigger alarm
IBC Code (International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk):
- Requires each cargo tank on chemical tankers to be equipped with high level alarm device
- Alarm device should be independent of level measurement system
- Alarm point usually set at 95% of tank capacity
- High-high level alarm (usually 98% tank capacity) should be set for overfill protection
IGC Code (International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk):
- Requires LPG/LNG carriers to be equipped with cargo tank high level alarms
- Considers special requirements for low temperature liquefied gas (temperature, pressure)
SOLAS Convention (International Convention for the Safety of Life at Sea):
- Requires ship safety equipment (including level alarm systems) to meet relevant standards
- Alarm system should 发出 audible and visual alarms in wheelhouse and cargo control room

Classification society requirements: DNV (Det Norske Veritas), ABS (American Bureau of Shipping), BV (Bureau Veritas), LR (Lloyd's Register) all require cargo tanks to be equipped with high level alarm systems. All classification societies require level alarm systems to pass Type Approval. Alarm systems should be functionally tested during annual surveys and special surveys.

System design requirements: 1. Independence — high level alarm system should be independent of conventional level measurement system, ensuring alarm system works when main system fails. 2. Redundancy — important cargo tanks should have dual level switches (high level + high-high level), dual sensor converter supports dual input. 3. Alarm function — audible and visual alarms should be 发出 in wheelhouse, cargo control station, deck, etc. 4. Explosion-proof requirements — cargo tank deck is hazardous area, sensors and electrical equipment should meet explosion-proof requirements (intrinsically safe Ex ia). 5. Test function — should have regular test function, 方便 crew to test alarm system without entering tank. 6. Recording function — alarm events should be recordable and traceable. 7. Power supply requirements — should be powered by main and emergency power supplies, ensuring operation during power loss.

Kongsberg GL-7B/GLB system compliance: GL-7B high level alarm switch has IECEx explosion-proof certification (Ex ia), suitable for hazardous areas. Has DNV/ABS/BV/LR classification society type approval. 24VDC power supply, can be powered by ship main and emergency power supplies. 4-20mA output, can connect to ship general alarm system. Dual sensor converter supports dual input, can 实现 high level + high-high level dual alarm. Meets MARPOL, IBC Code, IGC Code, and other international regulatory requirements.

Ships should strictly comply with flag state regulations and classification society rules when installing and using high level alarm systems, and regularly perform functional tests and surveys to ensure the system is always in normal working condition. GLB-7B/7A-SPARE-B, as a spare part, is used to timely replace faulty converters, ensuring continuous compliant operation of the system. To confirm whether the system configuration meets specific classification society requirements, Contact via email, we can assist in confirmation.

Q4: In stock? Lead time? Price?

A: Currently Order Available. Specific stock of Kongsberg Maritime marine automation spare parts fluctuates with market.

Lead time: Standard 4-8 weeks (Kongsberg marine spare parts are professional marine products, some common spare parts may be in stock, specific subject to formal quotation).
Price: Subject to formal quotation, depends on specific model, quantity, supply channel, whether includes technical service and on-site commissioning support, etc. Bulk procurement enjoys tiered discounts.
Package solutions: Complete marine level monitoring system package solutions available (converter + level switch + installation kit + cable + junction box + technical service combination), combined procurement price more favorable. If the project requires level switches and installation kits, it is recommended to purchase at the same time.
Expedited service: For urgent needs (urgent marine spare part replacement, classification society survey rectification, ship docking maintenance, system fault emergency repair), we can try to coordinate stock or expedited ordering, please contact sales team.
Please indicate: required quantity, desired delivery time and destination (can be delivered directly to port/ship agent), vessel type and classification society, compatible level switch model, whether installation kits and cables needed, whether installation commissioning and technical support services needed when inquiring; we will coordinate fastest delivery and optimal price.

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