KONGSBERG GT404D4H25T Pressure Sensor & Transmitter
KONGSBERG
New product
The KONGSBERG GT404D4H25T is a high-performance marine pressure transmitter within the Kongsberg GT400 Series Pressure Sensor family. The GT404 range is specifically designed for maritime pressure measurement, with the GT404 application focused on cargo-line and cargo-manifold pressure measurement.
The SM MARINE SERVICE™ stock photograph is particularly valuable because it shows two GT404D4H25T units together with Kongsberg documentation and test information.
The photographed units are:
KONGSBERG GT404D4H25T – S/N 175535
KONGSBERG GT404D4H25T – S/N 175536
Both units visibly carry:
CE 2460
II 1G Ex ia IIC T6 Ga
IECEx PRE 20.0103X
The photograph also includes a “Kongsberg GT400 series Pressure Sensor – Installation Manual”, confirming another important piece of terminology: although Kongsberg's GT404 product literature calls the equipment a Pressure Transmitter, its wider documentation also uses the term GT400 Series Pressure Sensor.
That means both pressure sensor and pressure transmitter are technically relevant search terms for this page.
| Information | Details |
|---|---|
| Manufacturer | Kongsberg |
| Product Family | GT400 Series |
| Product Series | GT404 |
| Exact Type | GT404D4H25T |
| Equipment Category | Marine Pressure Sensor / Pressure Transmitter |
| Serial Number – Unit 1 | 175535 |
| Serial Number – Unit 2 | 175536 |
| Visible Ex Marking | II 1G Ex ia IIC T6 Ga |
| IECEx Reference | PRE 20.0103X |
| CE Marking | 2460 |
| Primary Application | Cargo Line & Cargo Manifold Pressure Measurement |
| Documentation Shown | GT400 Series Pressure Sensor Installation Manual |
| Condition Shown | New / Boxed Stock |
Kongsberg's official IECEx certificate page identifies IECEx PRE 20.0103X specifically as the certificate for its GT400 Series pressure transmitters, with the certificate currently listed through 31 December 2030.
The GT404D4H25T belongs to Kongsberg's GT404 pressure-transmitter family.
Kongsberg states that the GT404 is a type-approved pressure transmitter specially designed for maritime applications, with the principal purpose of measuring pressure on cargo lines. The construction is specifically adapted for marine cargo service.
In practical vessel terminology, the equipment may therefore be requested under several names:
Kongsberg Pressure Sensor
Kongsberg Pressure Transmitter
Kongsberg Pressure Transducer
GT400 Series Pressure Sensor
GT404 Cargo Pressure Sensor
GT404 Cargo Line Pressure Transmitter
Kongsberg Manifold Pressure Sensor
This variation in terminology is important when sourcing older marine equipment because a purchasing department may call it a “sensor,” while the manufacturer's product datasheet calls it a “pressure transmitter.”
Cargo pressure measurement is critical during loading, transfer and discharge operations.
A pressure transmitter converts the pressure acting on its sensing element into an electrical measurement signal. That signal can then be used by compatible shipboard monitoring and cargo-control equipment.
Kongsberg designed the GT404 specifically around this application. Its official documentation describes a wide diaphragm opening intended to reduce cargo-residue buildup and an internal restrictor intended to protect the sensor membrane from pressure shocks.
This makes the GT404 particularly relevant to demanding tanker cargo operations.
Kongsberg documentation describes the GT404 sensing arrangement as a pressure-sensing element incorporating a ceramic Wheatstone-bridge structure.
The individual sensor characteristics are digitally stored and used to compensate the transmitter's pressure and temperature behavior.
This provides the basis for accurate, repeatable electronic pressure measurement in marine service.
The exact type shown in the SM MARINE SERVICE™ photograph is:
GT404D4H25T 25 Bar, GT404 25 Bar Pressure Sensor and Kongsberg 25 Bar Pressure Transmitter are important search combinations for this configuration.
However, for an actual replacement order, the pressure range should be confirmed from the transmitter's configuration documentation or vessel records rather than inferred only from the model code.
Kongsberg's GT404 family itself supports multiple pressure ranges, so full type-code matching is essential.
Kongsberg's GT400-series pressure transmitters use industry-standard electronic measurement interfaces.
For the GT404, Kongsberg documentation identifies a 4–20 mA current output, and the transmitter supports HART communication.
This allows the pressure measurement to be transmitted to compatible shipboard instrumentation and monitoring systems.
Relevant search and technical terminology includes:
4–20 mA Pressure Transmitter
2-Wire Pressure Sensor
HART Pressure Transmitter
24 VDC Marine Pressure Sensor
Kongsberg Electronic Pressure Transducer
The photographed GT404D4H25T units are marked:
and:
Kongsberg's official certificate database identifies IECEx PRE 20.0103X as its GT400 Series IECEx certification.
Kongsberg also maintains a current Presafe 20ATEX08383X certification entry for the GT400 Series, listed through 31 December 2030.
This is especially relevant for cargo areas where hazardous atmospheres may be present.
The exact Ex approval, electrical parameters and installation requirements must always be checked before replacing a transmitter in an intrinsically safe circuit.
An important feature visible in the SM MARINE SERVICE™ stock photograph is the Kongsberg test document.
The sheet shows test temperatures of:
0°C
22°C
60°C
and states:
“All test passed according to specification.”
This is useful evidence of the testing documentation supplied with the photographed equipment.
It should not, however, be interpreted as meaning that 0–60°C is the complete operating-temperature specification. These are the test temperatures shown on the supplied document, not necessarily the entire permissible operating range.
The photograph also contains an original-looking document titled:
This is particularly useful for identifying the terminology used around the wider GT400 family.
Kongsberg's own technical references also refer users to GT400 Series Pressure Sensor Applications Guidelines for installation and application details.
Installation and replacement must follow the correct documentation for the actual configuration and vessel installation.
Kongsberg specifically warns that the system must be depressurized before assembly of pressure transmitters.
For cargo or hazardous-area applications, replacement work should therefore include proper isolation, depressurization and compliance with vessel safety procedures.
For Ex installations, the intrinsic-safety arrangement must also remain compliant with the approved installation.
The GT404 family is particularly suitable for applications involving:
Kongsberg has also documented GT400-series transmitters as part of its wider marine tank-sounding and automation ecosystem, including integration with K-Chief-related applications.
Another model frequently appearing in searches is:
This is closely related in naming and is useful as a related GT404 search term, particularly for 25-bar pressure-transmitter searches.
However:
GT404D3H25T and GT404D4H25T must not automatically be treated as interchangeable.
Differences within the full ordering code can correspond to configuration differences. A replacement should therefore be selected from the complete type code, pressure requirement, process connection, electrical configuration and certification.
Kongsberg maintains a broader GT400 pressure-transmitter family.
Official documentation and current certifications include multiple models such as:
GT402 – Marine Pressure Transmitter
GT403 – Marine Pressure Transmitter
GT404 – Cargo Line / Manifold Pressure Transmitter
GT406 – Pressure Transmitter
GT420 / GT422 / GT423 – Differential Pressure Transmitter families
For example, Kongsberg's GT402 documentation covers a much wider pressure-range family, while GT403 has specific submersible and level-measurement applications.
These model families are related for search and sourcing purposes, but they are not automatically substitutes for GT404D4H25T.
The GT400 family has extensive marine certification coverage.
Current Kongsberg certificate records include:
IECEx – PRE 20.0103X
ATEX – Presafe 20ATEX08383X
American Bureau of Shipping – 23-2480571-PDA
ClassNK – TA25021M
China Classification Society – BG23PTB00013_01
Lloyd's Register – LR23144839TA
This broad certification footprint reinforces the GT400 family's positioning as purpose-built marine instrumentation.
Check loop supply, polarity, wiring, terminals, cable condition, safety barrier where fitted and the receiving analogue-input channel.
Compare the indicated value against a suitable calibrated reference. Verify the configured pressure range and inspect the process interface.
Check whether the process pressure itself is fluctuating. Then inspect wiring, shielding, grounding, cable termination and process connection.
Confirm actual line conditions and system configuration. Calibration/zero should only be investigated using the appropriate maintenance procedure and equipment.
Check the current loop, compatible HART equipment, wiring/load requirements and transmitter configuration.
Inspect the process-facing diaphragm according to approved vessel procedures. Do not use a cleaning method that may damage the sensing surface or coating.
Investigate pressure shocks, installation conditions, wiring, environmental exposure and process conditions rather than simply replacing the transmitter repeatedly.
For a replacement enquiry, provide the complete information wherever possible:
Manufacturer: Kongsberg
Series: GT400
Exact Model: GT404D4H25T
Pressure Range: Confirm from original configuration
Ex Marking: Confirm from nameplate
IECEx / ATEX Reference: Confirm where required
Output: Confirm electrical configuration
Process Connection: Match original installation
Serial Number: Useful for identification
Photograph: Front/body/nameplate photo recommended
This is safer than ordering simply by the description “Kongsberg pressure sensor.”
SM MARINE SERVICE™ supplies and sources KONGSBERG GT400 Series pressure sensors, GT404 marine pressure transmitters, cargo-line pressure sensors, cargo-manifold pressure transmitters and related marine automation/instrumentation spare parts.
The photographed stock provides exact references for:
GT404D4H25T – S/N 175535
GT404D4H25T – S/N 175536
Depending on stock and sourcing availability, marine equipment can be offered in:
New • Used • Refurbished • Reconditioned • Tested Working Condition
Customers searching for GT404D4H25T, GT404D3H25T, GT404 pressure sensor, GT400 Series pressure transmitter, Kongsberg cargo-line sensor or Kongsberg manifold pressure transmitter can contact SM MARINE SERVICE™ with their exact requirement.
It is a type within Kongsberg's GT404/GT400 Series marine pressure-transmitter family, used for marine pressure measurement, particularly cargo-line and manifold applications.
Both terms are relevant. Kongsberg's GT404 product documentation calls it a Pressure Transmitter, while the documentation shown with the supplied equipment uses the title “GT400 series Pressure Sensor.”
Kongsberg specifically identifies GT404 for cargo-line pressure measurement, with cargo-line/manifold monitoring being its key marine application.
The H25T model is strongly associated with 25-bar search terminology, but the exact calibrated range of a replacement should be confirmed from configuration documentation rather than inferred solely from the ordering code.
Yes. Kongsberg documents the GT404 as a current-output pressure transmitter with 4–20 mA and HART capability.
The two photographed units are visibly marked II 1G Ex ia IIC T6 Ga and IECEx PRE 20.0103X. Exact certification must be checked for the individual replacement unit.
Kongsberg identifies it as an IECEx certificate for the GT400 Series pressure transmitters. Its current certificate page lists expiry on 31 December 2030.
The supplied documentation visible in the photograph lists tests at 0°C, 22°C and 60°C and states that all tests passed according to specification.
The photographed stock includes documentation titled “Kongsberg GT400 series Pressure Sensor – Installation Manual.” Availability of documentation with any particular unit should be confirmed when ordering.
Do not assume interchangeability. Verify the complete configuration before substitution.
SM MARINE SERVICE™ supplies and sources Kongsberg marine pressure sensors, transmitters and marine automation/instrumentation spare parts for worldwide customers.
KONGSBERG GT404D4H25T GT400 Series Marine Pressure Sensor / Pressure Transmitter for cargo-line and cargo-manifold pressure measurement. SM MARINE SERVICE™ stock units S/N 175535 and 175536 are marked II 1G Ex ia IIC T6 Ga and IECEx PRE 20.0103X and are shown with Kongsberg GT400 Series Pressure Sensor Installation Manual and temperature-test documentation. GT404 / GT400 Series marine pressure sensors, pressure transmitters and related Kongsberg spare parts available with worldwide shipping and technical support.
Marine Automation & Navigation Equipment Supplier
Available Condition:
• New Equipment • Used Equipment • Refurbished Equipment • Reconditioned Equipment
Stock Location:
• Bangladesh • China
Services:
• Worldwide Shipping • Technical Support • Spare Parts Supply • Marine Equipment Sourcing
SM MARINE SERVICE™ Samir Market, DT Road, Pahartali, beside CDA Market, Chattogram, Bangladesh
Mobile / WhatsApp / Viber: +88 01818 929292
Email: info@smmarineservice.com
Website: www.smmarineservice.com
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