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Overview
Closed gauging is the mandatory measurement method for tankers carrying toxic, volatile, or high-vapour-pressure liquid cargoes — chemical tankers, product tankers, and vessels carrying cargoes where opening a tank hatch for gauging is either unsafe or prohibited under SOLAS, MARPOL, or cargo-specific carriage requirements. In closed gauging, the measuring instrument must enter the tank through a gas-tight fitting without allowing any cargo vapour or liquid to escape to the deck atmosphere — and must do so reliably, repeatedly, across the full range of cargo types, temperatures, and operating conditions the vessel will encounter in service. An instrument that fails to maintain gas-tight integrity at the tank connection, that requires frequent sensor recalibration after tape or sensor changes, or that lacks the certifications required by flag state, port state, and classification society inspectors creates operational and compliance problems that closed gauging operations simply cannot absorb.
The HERMetic UTImeter Gtex is a portable gas-tight liquid level gauge developed by Honeywell Tanksystem, designed specifically for closed gauging of hydrocarbons and chemicals on marine vessels. It performs three measurements in a single tank entry operation — ullage level measurement, temperature verification, and oil/water interface level detection — across a range of cargo types from standard hydrocarbon products to corrosive chemical cargoes, depending on the variant selected. The instrument connects to vapour control valves and is available with interchangeable adaptors for connection to different valve types, making it compatible with a wide range of existing tank gauging valve installations.
The defining technical advantage of the HERMetic UTImeter Gtex over many other portable closed gauging instruments is the factory-calibrated, self-contained sensor system. The RTD temperature probe has its characteristics stored inside the sensor itself — meaning that when a tape or sensor is replaced, no new calibration is required. The sensor sends true temperature values directly to the electronic package based on its stored calibration data. For vessel operators and terminal gauging teams who depend on instrument accuracy but need to minimise calibration downtime and the cost of returning instruments to service after maintenance, this no-recalibration-after-sensor-change design is a significant practical advantage over instruments that require full recalibration whenever a sensor or tape component is replaced.
Key Features
Gas-Tight Closed Gauging — No Vapour Escape at Tank Connection
The UTImeter Gtex is designed as a gas-tight instrument — when connected to the tank vapour control valve, the gauging operation is completed without cargo vapour or liquid escaping to the deck atmosphere. For chemical tankers and product tankers carrying toxic, noxious, or high-vapour-pressure cargoes where open or restricted gauging is not permitted under SOLAS Chapter II-2 and the IBC/IGC codes, gas-tight closed gauging is the only compliant measurement method. The UTImeter Gtex’s gas-tight design meets this requirement, allowing cargo gauging on closed-gauging-mandatory vessels and cargoes without vapour exposure to deck personnel or the environment.
Factory-Calibrated Sensor — No Recalibration After Tape or Sensor Replacement
The UTImeter Gtex’s RTD temperature probe stores its calibration characteristics inside the sensor itself. When a tape or sensor is exchanged, the new sensor’s stored calibration data is read directly by the electronic package — no new calibration procedure is required. For vessels and terminals where portable gauging instruments are used intensively and tape or sensor replacement is a routine maintenance event, this design eliminates the calibration downtime and associated service cost that instruments requiring recalibration after component changes generate. The practical result is faster return-to-service after maintenance and a lower total cost of instrument ownership over its service life.
Three Measurements in One Single Tank Entry Operation
The UTImeter Gtex measures ullage level, cargo temperature, and oil/water interface level simultaneously in a single probe insertion through the tank gauging point. On a chemical or product tanker conducting pre-departure or arrival gauging across multiple cargo tanks, completing all three measurement parameters in one tank entry per tank — rather than separate insertions for each parameter — reduces the number of gauge point openings required, shortens the total gauging round, and minimises cumulative vapour exposure from repeated gauge point operations on closed-gauging installations.
Four Variants — Covering Hydrocarbon, Chemical, and High-Viscosity Applications
The UTImeter Gtex is available in four variants to match the physical and chemical requirements of different cargo types. The standard version with 1-inch sensing probe and FKM gaskets covers key hydrocarbon applications. The Chem version with 1-inch probe and FFKM gaskets and tape connector is designed for corrosive liquid cargoes where standard FKM gasket material would be attacked by the cargo. The Visc version with 2-inch load on the sensing probe is recommended for high-viscosity hydrocarbon products where a standard probe diameter would not penetrate the cargo surface reliably. The Chem Visc version combines the FFKM chemical resistance of the Chem version with the 2-inch probe of the Visc version for high-viscosity corrosive cargoes. Selecting the correct variant for the cargo type is essential for measurement reliability and instrument longevity — FKM gaskets in contact with cargoes requiring FFKM will degrade rapidly and compromise the gas-tight integrity of the instrument.
Interchangeable Adaptors for Connection to Different Vapour Control Valves
The UTImeter Gtex can be fitted with interchangeable adaptors for connection to different vapour control valve types. For independent surveyors and gauging inspectors working across vessels and terminals with different valve installations — HERMetic, Whessoe, or other proprietary vapour control valve systems — interchangeable adaptors mean a single UTImeter Gtex can be used across multiple valve configurations without requiring separate instruments for each valve type. For vessel operators and terminal managers, this also means the instrument is not locked to a single valve manufacturer’s system, providing flexibility if valve infrastructure changes over time.
Standard Tape Cleaning Devices, Window Wiper, and Tape Protection
Tape cleaning devices, a window wiper, and tape protection components are supplied as standard parts with the UTImeter Gtex. On closed gauging instruments used with hydrocarbon and chemical cargoes, cargo contamination of the tape and window is a routine operational condition — without cleaning capability, cargo product coating the tape affects measurement accuracy and creates handling hazards for deck personnel. Including these maintenance components as standard avoids the procurement and operational gap that arises when cleaning accessories are treated as optional add-ons and are not available when needed on deck.
Easy Battery Exchange
The UTImeter Gtex is designed for easy battery exchange in field conditions. On a tanker deck or at a terminal gauge point, a portable gauging instrument that requires tools, disassembly, or workshop facilities for battery replacement creates operational delays at exactly the moment the instrument is needed. Easy battery exchange means the instrument can be returned to service quickly by the operator on deck without requiring assistance or interrupting the gauging round.
Technical Specifications
Product Name: HERMetic UTImeter Gtex
Manufacturer: Honeywell Tanksystem
Type: Portable Gas-Tight Liquid Level Gauge
Gauging Type: Closed Gauging — via vapour control valve
Measurement Functions: Ullage Level, Temperature, Oil/Water Interface
Temperature Sensor: RTD element, factory-calibrated, no recalibration after replacement
Available Versions: Standard (FKM), Chem (FFKM), Visc (2″ probe), Chem Visc (FFKM + 2″ probe)
Probe Diameter: 1-inch (standard/Chem), 2-inch (Visc/Chem Visc)
Valve Compatibility: Interchangeable adaptors for multiple vapour control valve types
Standard Accessories: Tape cleaning devices, window wiper, tape protection
Application: Cargo Control, Custody Transfer, Temperature Verification, Free Water Detection
Compatible Vessels: Marine Vessels (chemical tankers, product tankers, crude tankers)
Safety Approvals: ATEX, IECEx, Factory Mutual, NEPSI, GOST
National Authority Approvals: USCG, MSA, GOST-R
Classification Society Approvals: All major classification societies
Benefits
Eliminates calibration downtime and cost after routine tape or sensor replacement. On instruments that require recalibration after component changes, every tape or sensor replacement generates a calibration event — with the associated time, cost, and instrument unavailability that entails. The UTImeter Gtex’s factory-calibrated self-contained sensor eliminates this cycle entirely. Tape and sensor replacement is a maintenance event, not a calibration event, and the instrument returns to service immediately after the replacement without requiring a calibration procedure.
Enables compliant gauging on closed-gauging-mandatory cargoes and vessel types. For chemical tankers and product tankers carrying cargoes where closed gauging is mandatory under SOLAS, the IBC Code, or flag state requirements, the gas-tight closed gauging design of the UTImeter Gtex is not a feature preference — it is an operational compliance requirement. Having an instrument that is correctly designed and certified for closed gauging operations prevents the compliance exposure that arises from using instruments not rated for closed gauging on closed-gauging-mandatory installations.
Single instrument covers the full range of cargo types with correct variant selection. The four-variant range — standard, Chem, Visc, Chem Visc — means the UTImeter Gtex platform covers hydrocarbon cargoes, corrosive chemical cargoes, high-viscosity products, and combinations of those characteristics. For vessels trading across multiple cargo types or for terminal operations handling diverse product categories, selecting the correct Gtex variant for each application provides consistent closed gauging capability across cargo types without maintaining separate instrument platforms.
Interchangeable valve adaptors reduce the instrument inventory needed across multiple installations. Rather than maintaining separate instruments for each vapour control valve type across a fleet or terminal infrastructure, interchangeable adaptors allow a single UTImeter Gtex to be used on different valve installations. For ship management companies provisioning instruments across a managed fleet with different valve systems, and for independent surveyors working across diverse installations, this adaptability reduces instrument inventory requirements and procurement complexity.
Comprehensive regulatory compliance across IMO, ISO, API, and national authority requirements. The UTImeter Gtex’s certification coverage across IMO (SOLAS, MARPOL), ISO, API MPMS, IP, ATEX, IECEx, USCG, and all major classification societies means it satisfies the full matrix of regulatory requirements that apply to portable gauging instruments on international trading tankers. For procurement teams and HSE managers responsible for ensuring portable equipment meets all applicable standards, the UTImeter Gtex’s comprehensive approval coverage eliminates the compliance gap risk that instruments with partial certification coverage create.
Who It’s For
The Cargo Officer on a Chemical Tanker Carrying Closed-Gauging-Mandatory Cargoes
You’re the chief officer or cargo officer on a chemical tanker carrying IBC Code cargoes where closed gauging is required under the carriage conditions. You need a portable gauging instrument that maintains gas-tight integrity throughout the measurement operation, covers all three measurement parameters in a single tank entry, and carries the certification references — ATEX, IECEx, classification society approvals — that port state control and class surveyors will expect to see on your portable equipment register. The UTImeter Gtex Chem version, with its FFKM gaskets and tape connector designed for corrosive liquid contact, gives you the closed gauging instrument your cargo types and carriage conditions require.
The Fleet Equipment Manager or Technical Superintendent Standardising Portable Gauging Across a Managed Fleet
You manage the portable gauging equipment inventory across a fleet of product and chemical tankers. You need instruments that cover the full range of cargo types your vessels carry, are certified to all the standards your flag state and classification society require, and are maintainable without generating calibration events every time a component is replaced. The UTImeter Gtex’s four-variant range, comprehensive approval coverage, and no-recalibration-after-replacement sensor design make it a practical standardisation choice across a mixed fleet — one instrument platform with variant selection for cargo type, rather than multiple different instrument platforms for different vessel types.
The Independent Surveyor Working Across Chemical and Product Tanker Custody Transfer Operations
You conduct independent custody transfer gauging on chemical and product tankers at load ports and discharge ports across different flag states and terminal jurisdictions. Your instruments need to be accepted by the cargo interests, terminal operators, and class surveyors at every location you work — which means meeting the full range of IMO, API, ISO, and national authority requirements. The UTImeter Gtex’s comprehensive certification coverage across USCG, MSA, GOST-R, ATEX, IECEx, and all major classification societies gives you an instrument that is unlikely to be challenged on certification grounds at any major trading port or terminal.
Possible Applications
- Chemical tanker closed gauging — IBC Code mandatory closed gauging cargo operations — Gas-tight closed gauging on chemical tankers carrying IBC Code cargoes where closed gauging is a mandatory carriage condition, including toxic and noxious liquid bulk cargoes.
- Product tanker custody transfer measurement at marine load and discharge berths — Closed gauging for cargo quantity measurement at load port and discharge port, producing ship’s figures for bill of lading and cargo receipt documentation on petroleum product tankers.
- High-viscosity cargo gauging — heavy fuel oil, bitumen, palm oil, lubricating oil — Visc version gauging with 2-inch probe for high-viscosity petroleum products and vegetable oils where standard probe diameter would not penetrate the cargo surface reliably to produce a true ullage measurement.
- Corrosive chemical cargo gauging — acids, alkalis, aggressive solvents — Chem version gauging with FFKM gaskets and tape connector for chemical cargoes that would degrade FKM gasket material, maintaining gas-tight integrity on corrosive liquid gauging operations.
- Free water detection and oil/water interface measurement — cargo quality and MARPOL compliance — Oil/water interface level detection in cargo tanks and slop tanks for free water monitoring, cargo quality management, and MARPOL-compliant slop tank management on closed-gauging tankers.
- Temperature verification for heated cargo management — IMO and API documentation — Cargo temperature measurement to API MPMS Chapter 7 standard for heated cargo temperature records, cargo quality certificates, and API-standard cargo temperature documentation on product and chemical tankers.
- Shore-based chemical and petroleum product storage tank closed gauging — Closed gauging of shore storage tanks at chemical terminals, petrochemical plants, and petroleum product depots where vapour containment during gauging is required for personnel safety or regulatory compliance.
- Multi-valve-type installations — independent surveying across diverse terminal infrastructure — Use of interchangeable valve adaptors to gauge tanks fitted with different vapour control valve types across multiple vessel and terminal locations without requiring separate instruments per valve system.
Trust & Certifications
IMO — SOLAS 74, MARPOL 73/78
The UTImeter Gtex complies with IMO regulations under SOLAS 74 and MARPOL 73/78 — the two foundational international conventions governing safety and pollution prevention on ocean-going vessels. SOLAS compliance is required for safety equipment used on internationally trading vessels; MARPOL compliance covers the pollution prevention requirements relevant to cargo gauging instruments used on tankers. IMO compliance is the entry-level certification requirement for any portable gauging instrument used on internationally trading tankers and is required for class survey and port state control acceptance.
ISO — 4512, 3170, 4268
Compliance with ISO 4512 (gauging equipment for road tankers), ISO 3170 (manual sampling of petroleum products), and ISO 4268 (temperature measurement) provides internationally recognised measurement standard references for the UTImeter Gtex’s gauging and temperature measurement functions. ISO compliance is relevant to procurement teams specifying instruments against international measurement standards and to independent inspection companies whose clients require ISO-referenced measurement accuracy assurance in custody transfer reports.
API — MPMS Chapters 3.1A, 7, 8.1, 17.11
Compliance with API Manual of Petroleum Measurement Standards (MPMS) chapters covering tank gauging (Chapter 3.1A), temperature determination (Chapter 7), sampling (Chapter 8.1), and marine measurement (Chapter 17.11) confirms the UTImeter Gtex meets the American Petroleum Institute’s measurement standards across the full range of petroleum gauging, temperature, and marine measurement functions. API MPMS compliance is required for custody transfer operations involving US-based oil majors, USCG-regulated vessels, and international cargo operations where API-standard measurement documentation is specified by the cargo interests.
ATEX, IECEx, Factory Mutual, NEPSI, GOST — Hazardous Area Approvals
The UTImeter Gtex carries hazardous area approvals from ATEX (European Union explosive atmosphere directive), IECEx (international hazardous area equipment certification scheme), Factory Mutual (US-based third-party safety certification), NEPSI (Chinese hazardous area certification authority), and GOST (Russian/CIS standards). This multi-scheme hazardous area approval coverage means the UTImeter Gtex is accepted for use in hazardous areas across the major trading regions globally — EU ports, US ports, Chinese terminals, and Russian/CIS ports — without the certification gaps that instruments with single-scheme approvals can face in certain jurisdictions.
National Authority Approvals — USCG, MSA, GOST-R
Approval by the US Coast Guard (USCG), the UK Maritime and Coastguard Agency (MSA), and GOST-R (Russian certification authority) confirms the UTImeter Gtex meets the national authority requirements of the major flag states and port state control authorities in the key tanker trading regions. USCG approval is particularly significant for vessels calling at US ports, where port state control enforcement of equipment certification requirements is rigorous.
All Major Classification Societies
Approval by all major classification societies — including Lloyd’s Register, DNV, Bureau Veritas, ClassNK, ABS, and RINA — confirms the UTImeter Gtex meets the portable gauging equipment standards required by vessels classed with any of the major international classification organisations. For procurement teams and technical superintendents managing vessels across multiple class societies, class approval across all major societies eliminates the instrument-per-class-society compatibility concern that single-society approvals create.
EC Directives — EMC (89/336/EEC), MED (96/98/EC), ATEX 100a (94/9/EC)
Compliance with the EC Electromagnetic Compatibility Directive (89/336/EEC), the Marine Equipment Directive (96/98/EC), and the ATEX 100a equipment directive (94/9/EC) confirms the UTImeter Gtex meets EU requirements for electromagnetic compatibility, marine equipment approval, and explosive atmosphere equipment. The Marine Equipment Directive (MED) wheel mark is specifically relevant for equipment used on EU-flagged vessels — it is the EU certificate of compliance for marine safety equipment and is required by EU maritime authorities for portable gauging instruments on EU-flagged tankers.
Honeywell Tanksystem — Manufacturer Credibility
The HERMetic UTImeter Gtex is a Honeywell Tanksystem product. Honeywell is a globally recognised industrial technology company with established presence across process control, safety systems, and petroleum measurement instrumentation. Honeywell Tanksystem’s HERMetic product range has a long service history across the tanker and petroleum terminal sector. For procurement teams and technical managers making instrument sourcing decisions, Honeywell’s manufacturer credibility provides assurance of long-term parts availability, technical support infrastructure, and product development continuity that smaller or less-established instrument manufacturers cannot offer to the same degree.
Accessories & Variants
HERMetic UTImeter Gtex — Standard Version (FKM Gaskets, 1-Inch Probe)
The standard UTImeter Gtex with 1-inch sensing probe and FKM gaskets is the appropriate variant for key hydrocarbon applications — crude oil, petroleum products, fuel oil, and other standard hydrocarbon cargoes where FKM gasket material is compatible with the cargo chemistry. This is the most widely used variant for product and crude oil tanker operations.
HERMetic UTImeter Gtex Chem — FFKM Gaskets and Tape Connector for Corrosive Liquids
The Chem version replaces the standard FKM gaskets with FFKM (perfluoroelastomer) gaskets and adds an FFKM tape connector, providing chemical resistance to corrosive liquid cargoes — acids, alkalis, aggressive solvents, and other chemical cargoes that would degrade FKM gasket material. The Chem version is the correct selection for chemical tankers carrying corrosive IBC Code cargoes.
HERMetic UTImeter Gtex Visc — 2-Inch Probe for High-Viscosity Hydrocarbons
The Visc version adds a 2-inch load on the sensing probe, providing the probe weight required to penetrate high-viscosity cargo surfaces reliably for accurate ullage and interface measurement. Recommended for heavy fuel oil, bitumen, palm oil, and other high-viscosity petroleum or vegetable oil cargoes where the standard 1-inch probe may not descend consistently through the cargo surface.
HERMetic UTImeter Gtex Chem Visc — FFKM Gaskets and 2-Inch Probe
The Chem Visc version combines the FFKM chemical resistance of the Chem version with the 2-inch probe of the Visc version — for high-viscosity corrosive chemical cargoes where both chemical material compatibility and probe weight are required for reliable closed gauging measurement.
Interchangeable Valve Adaptors
Interchangeable adaptors are available to connect the UTImeter Gtex to different vapour control valve types across different vessel and terminal installations. Contact Alright Engineering Solutions to confirm adaptor availability for your specific vapour control valve system.
Related Portable UTI Gauging Instruments
HERMetic UTImeter Rtex — Restricted type portable UTI meter from the HERMetic range for marine vessels and shore tanks via HERMetic vapour control valves, with optional Visc version for innage and reference height measurement
MMC UTI Meter D2401-2 — MMC restricted type UTI meter with Tefzel-coated anti-static tape and API Chapter 7 temperature compliance
T2000-TFC-01 Portable UTI Meter — Restricted type UTI meter with Ex ia IIB T4 intrinsic safety and ±2mm tape accuracy
GX-8000 Sample Draw Multi Gas Monitor — Portable marine sample draw multi-gas monitor for cargo tank atmosphere testing and confined space entry
Get in Touch
If you need the HERMetic UTImeter Gtex for closed gauging on a chemical tanker, product tanker, or petroleum storage tank installation — whether for immediate vessel supply, fleet standardisation, or guidance on selecting the correct variant for your cargo type and valve system — contact Alright Engineering Solutions to confirm availability and request a formal quotation.
Our team can advise on version selection (standard, Chem, Visc, or Chem Visc), valve adaptor compatibility with your existing vapour control valve installation, and certification documentation requirements for your flag state and classification society.
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