KONGSBERG GT404D4H25T Pressure Transmitter
KONGSBERG
New product
The KONGSBERG GT404D4H25T is a marine pressure transmitter belonging to Kongsberg Maritime's GT404 family, a purpose-designed range for cargo-line and cargo-manifold pressure measurement aboard ships.
Kongsberg officially describes the GT404 as a type-approved maritime pressure transmitter designed for cargo lines and manifolds. The family is available in gauge, sealed-gauge and absolute configurations with pressure ranges extending from approximately 0.6 to 40 bar, depending on the selected configuration.
The GT404D4H25T shown by SM MARINE SERVICE™ is an actual stock/reference unit, and its body marking provides valuable identification information for replacement enquiries.
Manufacturer: Kongsberg Maritime
Product Family: GT404
Exact Type: GT404D4H25T
Product Type: Marine Pressure Transmitter / Pressure Sensor / Pressure Transducer
Serial Number: 175536
CE Identification: 2460
Visible Ex Marking: II 1G Ex ia IIC T6 Ga
Visible IECEx Certificate Reference: IECEx PRE 20.0103X
Primary Marine Application: Cargo Line & Cargo Manifold Pressure Measurement
The exact type and certification markings above are taken from the photographed equipment. They are particularly important when sourcing replacement equipment because different GT404 configurations should not automatically be treated as interchangeable.
The GT404 is an electronic pressure-measuring instrument that converts process pressure into an electrical signal for transmission to the vessel's cargo monitoring, automation or instrumentation system.
Kongsberg's official documentation identifies its principal purpose as measuring pressure on cargo lines and manifolds. Its construction is specifically adapted to this environment, including a large process-facing diaphragm intended to reduce the problems associated with cargo residues.
For SEO and purchasing terminology, buyers may refer to the same general equipment category as:
Pressure Transmitter • Pressure Sensor • Pressure Transducer • Cargo Pressure Sensor • Cargo Line Pressure Transmitter • Manifold Pressure Sensor • Marine Pressure Sensor
The official Kongsberg terminology, however, is Pressure Transmitter.
Cargo-line instrumentation operates under challenging conditions. The transmitter may encounter process residues, pressure changes, vibration and the demanding environmental conditions associated with marine installations.
Kongsberg designed the GT404 with a Teflon-coated stainless-steel diaphragm to reduce cargo-residue buildup. The official documentation also describes an internal restrictor between the front membrane and sensor membrane to help protect the sensing element against pressure shocks.
The transmitter body is stainless steel, and current certification documentation identifies the GT404 with a large-diaphragm flanged process connection and IP66/67 enclosure arrangement.
Inside the GT404 is a dry ceramic pressure-sensing element using an internal strain-gauge Wheatstone bridge.
Kongsberg digitally characterizes each sensing element at known pressure and temperature points and stores this information in sensor memory. This allows individual linearization and temperature compensation, improving measurement accuracy and temperature stability.
The measured process pressure is converted to the electrical output used by the vessel's monitoring system.
The following are official GT404-family specifications. Exact ordering-code specifications must still be confirmed before replacing a GT404D4H25T.
| Parameter | KONGSBERG GT404 Family |
|---|---|
| Product | Marine Pressure Transmitter |
| Application | Cargo Lines / Cargo Manifolds |
| Pressure Types | Gauge / Sealed Gauge / Absolute |
| Family Pressure Range | 0.6–40 bar |
| Output | 4–20 mA, 2-wire with HART |
| Nominal Supply | 24 VDC |
| Supply Variation | 12–32 VDC depending on load |
| Transmitter Body | Stainless Steel / AISI 316 family construction |
| Front Membrane | Stainless Steel, Teflon coated |
| Active Membrane Diameter | 59 mm |
| Process Flange Outside Diameter | 98 mm |
| Flange Fixing | 6 × M6 screws |
| Environmental Protection | IP66/67 in current certification |
| Hazardous Area | Intrinsically safe certified configurations available |
Kongsberg's Lloyd's Register type approval confirms the GT404 as a 24 VDC, 4–20 mA / 2-wire HART pressure transmitter for marine, offshore and industrial applications.
The GT404 uses the widely adopted 4–20 mA current-loop principle, combined with HART communication.
This makes the transmitter suitable for integration into compatible cargo-monitoring and control systems while providing a robust industrial measurement signal.
The official type-approval documentation specifies:
Power Supply: 24 VDC
Output: 4–20 mA
Wiring: 2-wire
Communication: HART
For purchasing and search purposes, this makes terms such as Kongsberg HART pressure transmitter, GT404 4–20mA sensor, and 24VDC marine pressure transmitter highly relevant.
Cargo areas aboard tankers can require intrinsically safe instrumentation.
Current certification documentation covers the GT-series as pressure transmitters converting pressure into a 4–20 mA current-loop signal and includes GT404 within the certified family.
Most importantly, the actual SM MARINE SERVICE™ GT404D4H25T photographed here is marked:
II 1G Ex ia IIC T6 Ga
and:
IECEx PRE 20.0103X
The IECEx certificate reference visible on the unit corresponds to Kongsberg GT-series pressure-transmitter certification documentation.
This is important: always match the certification of the replacement unit to the vessel's required installation. A generic GT404 family specification should not override the exact Ex marking on an individual transmitter.
The GT404 is not simply a generic engine-room pressure sensor.
Kongsberg's K-Gauge cargo-system literature specifically identifies the GT404 as the cargo line and manifold pressure transmitter. The same system documentation includes measurements for line/manifold pressure, pump pressure, vapour pressure and other cargo-system variables.
This makes the GT404 particularly relevant for:
Oil Tankers • Chemical Tankers • Product Tankers • Cargo Handling Systems • Cargo Manifolds • Cargo Pipelines • Shipboard Cargo Monitoring Systems
During loading, transfer and discharge operations, reliable pressure measurement gives vessel personnel and associated monitoring systems important information about cargo-system operating conditions.
The exact SM MARINE SERVICE™ stock unit is marked GT404D4H25T.
The H25T portion naturally makes 25 bar a commercially important search term, and Google is already associating your page with the title “GT404 Marine Cargo Line & Manifold Pressure Sensor 25 Bar.”
However, I am deliberately separating search terminology from an unverified exact nameplate range: the photographed body does not visibly print a separate 0–25 bar range.
Kongsberg's official GT404 documentation confirms that the overall family covers ranges up to 40 bar.
So the page can strongly target GT404D4H25T 25 Bar as a model/search phrase while avoiding an unsupported claim that every D4H25T configuration has an independently verified 0–25 bar calibrated range unless its configuration documentation confirms it.
Your Google results also repeatedly return:
KONGSBERG GT404D3H25T 25 BAR PRESSURE TRANSMITTER
That exact model is independently found in current marketplace listings, and trade data also records GT404D3H25T as a Kongsberg pressure sensor.
Therefore, GT404D3H25T is worth capturing as a related-model search keyword.
But:
GT404D3H25T ≠ automatically GT404D4H25T.
We should not claim that D3 and D4 versions are direct replacements without Kongsberg configuration documentation confirming equivalence.
That distinction protects the technical credibility of the page while still allowing Google to understand the relationship between searches for the two GT404 variants.
Kongsberg's current certification portfolio includes multiple marine pressure-transmitter types alongside GT404, including:
GT300 • GT301 • GT402 • GT403 • GT404 • GT406
The same certification family also includes differential-pressure transmitters such as:
GT420 • GT422 • GT423.
These are useful Kongsberg marine-instrumentation family terms, but they should not be represented as interchangeable substitutes for GT404D4H25T.
For example, Kongsberg describes GT403 as a submersible transmitter suitable for applications including ballast/bunker tank level, pump pressure, draft, trim and list, whereas GT404 is specifically oriented toward cargo-line/manifold pressure measurement.
The GT404 family is especially relevant where shipboard cargo-system pressure needs to be monitored electronically.
Typical applications include:
Check the 24 VDC loop supply, polarity, wiring continuity, cable termination, intrinsic-safety barrier where applicable, and receiving input channel before condemning the transmitter.
Compare the indication with a calibrated reference. Inspect the process interface for contamination and verify that the transmitter range/configuration corresponds to the monitoring system setup.
Check wiring, grounding, screening, cable condition and process-pressure stability. Kongsberg specifies screened twisted-pair cable and grounding arrangements for GT404 installations.
Inspect the current loop and monitoring-system input, then verify actual process pressure and transmitter condition.
A valid analog signal does not necessarily prove that every digital communication function is correct. Check the loop configuration, compatible HART equipment and electrical installation.
The GT404 design is intended to reduce residue buildup, but the process-facing area should still be inspected according to vessel procedures when measurement accuracy is questioned.
Do not bypass the approved intrinsic-safety arrangement to troubleshoot a hazardous-area transmitter. Confirm the approved barrier, wiring, earthing and transmitter certification.
When ordering a replacement KONGSBERG GT404, do not send only the words “GT404 pressure sensor.”
For the safest identification, provide:
Full Model / Type Code
GT404D4H25T or the exact code on the existing transmitter.
Pressure Range / Calibration
Confirm the required measuring range from the existing installation/documentation.
Ex Certification
Especially important for tanker and hazardous-area installations.
Output Signal
Verify the required 4–20 mA / HART arrangement.
Process Connection
Confirm flange and installation details.
Electrical Connection
Check cable entry/gland and installation requirements.
Serial Number / Nameplate Photo
A clear photograph helps prevent errors when identifying older or variant units.
SM MARINE SERVICE™ supplies and sources KONGSBERG GT404 marine pressure transmitters, pressure sensors, pressure transducers and associated marine instrumentation spare parts for vessel owners, ship managers, shipyards, marine service companies and international purchasing departments.
Search and enquiry references can include:
GT404D4H25T • GT404D3H25T • GT404 • Cargo Line Pressure Transmitter • Cargo Manifold Pressure Sensor • Kongsberg 4–20mA HART Transmitter • Kongsberg Marine Pressure Sensor
Available equipment may include:
New • Used • Refurbished • Reconditioned • Tested Working
Availability, exact configuration and condition should be confirmed at the time of quotation.
SM MARINE SERVICE™ supports marine operators requiring replacement automation, navigation and instrumentation equipment, including difficult-to-source or model-specific marine components.
For Kongsberg pressure-transmitter enquiries, customers can provide the model number, pressure range, nameplate photograph and required quantity, allowing the requested configuration to be checked before quotation.
Stock and sourcing support is available from Bangladesh and China, with international delivery for marine customers worldwide.
GT404D4H25T is a type code within the Kongsberg GT404 marine pressure-transmitter family. Kongsberg designed GT404 for cargo-line and cargo-manifold pressure measurement.
Kongsberg officially calls GT404 a pressure transmitter. “Pressure sensor” and “pressure transducer” are also commonly used buyer/search terms for this category.
Its principal documented marine application is measuring pressure on cargo lines and cargo manifolds.
Yes. Current certification identifies GT404 as a 4–20 mA, two-wire transmitter with HART.
Kongsberg specifies 24 VDC nominal and states that the transmitter can tolerate 12–32 VDC depending on load; intrinsically safe installations have additional limitations.
The photographed SM MARINE SERVICE™ unit carries II 1G Ex ia IIC T6 Ga and IECEx PRE 20.0103X markings. The replacement's exact approval must be matched to the required installation.
GT404D4H25T 25 bar is an important model/search phrase and related H25T variants are publicly associated with 25-bar-class searches. However, for replacement purposes the exact calibrated range should be verified from the transmitter configuration or vessel documentation rather than inferred solely from the model string.
No equivalence should be assumed. They are closely related GT404 search/model references, but the D3/D4 configuration difference must be checked before replacement.
Depending on stock and sourcing availability, SM MARINE SERVICE™ can support new, used, refurbished and reconditioned marine equipment.
Send the full model number, clear nameplate photograph, pressure range if known, required quantity and vessel/application information.
SM MARINE SERVICE™ supplies and sources Kongsberg marine pressure transmitters and other marine automation/instrumentation equipment for worldwide customers.
KONGSBERG GT404D4H25T Marine Pressure Transmitter / Pressure Sensor for cargo-line and cargo-manifold pressure measurement. GT404 marine transmitter family with stainless-steel construction, large process diaphragm, 4–20 mA two-wire HART technology and hazardous-area configurations. Exact SM MARINE SERVICE™ stock reference: GT404D4H25T, S/N 175536, marked II 1G Ex ia IIC T6 Ga and IECEx PRE 20.0103X. New, Used, Refurbished and Reconditioned Kongsberg marine equipment 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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