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Thickness Gauge Using Ultrasonic Technology

Fast facts

Thickness Gauges from Cygnus – Precision, Reliability, and Confidence in Every Measurement
We at ZRS are proud distributors of Cygnus Instruments—the world leader in ultrasonic thickness measurement. With proven Multiple-Echo technology, you get accurate measurements through paint, rust, and coatings—without having to grind away the protective layer. This saves time, preserves the material, and reduces the risk of errors.

The technology works by detecting multiple ultrasonic echoes within the material, making it possible to measure the actual wall thickness even when the surface is painted or corroded.

Whether you work underwater, in an industrial setting, or inspect tanks, pipes, and structures, there’s a model to suit your needs. Cygnus combines British engineering, rugged construction, and intuitive operation—all so you can trust every measurement, every time.

ZRS offers consulting, service, and support—with a focus on long-term value and technical reliability. Together, we’ll help you choose the right meter for the job.

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Measures the thickness of metal without having to remove the paint. Measures through paint layers up to 20 mm thick.
Verifies the measurement value by comparing two consecutive measurements.
Can use measurement probes with one or two crystals, depending on the measurement situation
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More information about
Thickness Gauge Using Ultrasonic Technology

Find what you are looking for

Cygnus

The instruments use digital multiple-echo technology to obtain accurate thickness measurements through coatings and corrosion. Cygnus ultrasonic thickness gauges are available for use above and below water and are EX-rated.

Cygnus manufactures ultrasonic testing equipment—which is non-destructive—for maintenance and inspection across a wide range of applications. Examples include ship inspections, inspections of oil and gas platforms, bridge abutments, pipes, and scaffolding. For underwater use, Cygnus offers the Cygnus Dive for divers and the Cygnus Rov, which is specially designed for underwater vehicles.

Below is a list of the various thickness gauges available. Contact us for more information.

The products are manufactured in the United Kingdom and are well-built, sturdy, and durable, as reflected in their three-year warranty

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DT-25 Mechanical thickness gauge

The DT-25 soft material thickness gauge is used to perform precise thickness measurements on soft materials and complies with international standards.

The easily adjustable downward speed of the press foot is controlled by a unique hydraulic damping system that ensures superior repeatability and eliminates human-dependent results.

The applied pressure is determined by an adjustable counterweight system, an easy-to-use feature that allows for continuous pressure adjustment.

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Cygnus 1 Ex Ultrasonic Thickness Gauge

This tamper-proof thickness gauge is specially designed for use in explosive environments, the petroleum industry, coal mines, and dusty areas. With three measurement modes and advanced data logging offers the accurate through-wall measurements of heavily corroded metals.

Characteristics:

Use in explosive zones (0, 1, 2)
Large color LCD screen
Three measurement modes for different materials
High-Temperature Measurement
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Cygnus 2+ Hands-Free Ultrasonic Thickness Gauge

A simple yet versatile thickness gauge designed for hands-free use, featuring an end-mounted display and three measurement modes for measuring the wall thickness of a wide variety of materials (including plastics) and metals with all degrees of corrosion and pitting.​

Characteristics:

Hands-free design for easy use
Designed for plastic and metal
Three measurement modes
Measures by color
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Cygnus 4 General Purpose Ultrasonic Thickness Gauge

Cygnus 4 – Compact Thickness Gauge for Daily Inspection and Maintenance
Cygnus 4 is a user-friendly and rugged ultrasonic gauge for non-destructive measurement of wall thickness in metals—without the need to remove paint or protective coatings. It is ideal for inspectors and technicians in sectors such as energy, marine, industrial, and infrastructure.

Using Cygnus’s patented Multiple-Echo technology, the instrument provides accurate measurements even on painted or coated surfaces. This saves time, increases safety, and reduces the risk of measurement errors.

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Characteristics:

Rugged construction (IP65/IP67) – withstands moisture, dust, and harsh environments
Intuitive menu and quick-start feature—easy to use even for inexperienced users
Powered by Multiple-Echo technology – for reliable and repeatable measurements
Measures through paint and surface coatings—no pretreatment required
Compact and lightweight—perfect for working at heights, in tight spaces, or out in the field
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Cygnus 4+ General Purpose Ultrasonic Thickness Gauge

Cygnus 4+ – a rugged and flexible thickness gauge for demanding environments
Cygnus 4+ is a versatile and reliable ultrasonic thickness gauge, designed for accurate measurement of remaining wall thickness in metals and other materials—even in demanding and hard-to-reach environments.

The instrument is suitable for a wide range of applications in maintenance, inspection, and corrosion monitoring, such as in the energy, process, marine, petrochemical, and construction industries.

With its intuitive interface and clear color display, it is easy to use, even when wearing gloves or in difficult working conditions.

Characteristics:

Live A-scan display – provides full control over every measurement through visual interpretation of the ultrasound signal
Sequential data logging – saves and organizes measurement values for traceable documentation
High-temperature probe (up to 300 °C) – enables measurement during operation without cooling breaks
Three measurement modes—including single echo, echo-to-echo, and measurement using pattern signals—for greater flexibility
Rugged and IP66/IP67-rated—designed for field work in harsh environments
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Cygnus 6+ PRO Ultrasonic Thickness Gauge

Cygnus 6 PRO – Advanced ultrasonic gauge for inspection in demanding environments
The Cygnus 6 PRO is a powerful and rugged thickness gauge with advanced features for accurate and efficient material inspection. With live A-scan and B-scan display, manual measurement, data collection, and multiple measurement modes, it is ideal for professionals in industries such as energy, marine, offshore, petrochemicals, and heavy industry.

The device is IP67-rated, features a high-resolution color display, a smart user interface, and up to 2 weeks of battery life—optimized for field work in harsh environments.

Cygnus 6 PRO combines precision, flexibility, and durability—for those who demand reliable measurements and advanced functionality in a single tool.

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Characteristics:

A-scan and B-scan in real time
Can measure through coatings up to 20 mm thick
High-Temperature Probe for Extreme Environments
Suitable for industrial applications
3 measurement modes (Multiple-Echo, Echo-Echo, Single-Echo)
Extensive internal data logging and USB-C transfer
Sturdy aluminum housing, IP67
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Cygnus Underwater Ultrasonic Thickness Gauge ​

Cygnus Underwater – Thickness Gauge for Divers
Cygnus Underwater is a handheld ultrasonic gauge designed for underwater use, specifically developed for diving inspections at depths of up to 300 meters. It uses multiple-echo technology to measure wall thickness through coatings—without damaging the material.

With a clear display, glove-friendly buttons, and a rugged design, it is ideal for offshore, marine, and underwater inspection applications where fast and reliable measurements are required.

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Characteristics:

3 measurement modes for different corrosion levels, material types, and measurement through coatings
Depth Sensor – displays the diver's current depth in real time
Live A-scan – provides visual confirmation of each measurement
Very easy to use—only 3 function buttons and up to 4 screen views
Comprehensive data logging – supports both linear and grid-based logging
Deep Coat function – ignores thick surface coatings during measurement
Built-in real-time clock (RTC) – time and date stamps for each measurement point
Automatic Gain Control – automatically optimizes probe performance
Multiple-Echo Mode – for reliable measurement through coatings, in accordance with classification society requirements
MSI (Measurement Stability Indicator) – confirms that the measurement is stable and therefore reliable
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Cygnus DIVE Underwater Ultrasonic Thickness Gauge

Cygnus Dive – the most widely used thickness gauge for underwater inspection
Cygnus Dive is the professional diver’s top choice for underwater wall thickness measurement—easy to use, built for harsh environments, and reliable on every dive. With proven Multiple-Echo technology, you can measure through paint, rust, and marine deposits without damaging the substrate.

Whether you're inspecting ship hulls, offshore structures, or underwater pipes, Cygnus Dive provides you with fast and accurate measurements, right in your hand—even when wearing thick gloves.

Cygnus Dive is the perfect tool for underwater NDT inspection—designed to last, be reliable, and perform in real-world conditions. At ZRS, we help you choose the right model and offer service, support, and accessories.

Clear LED display on the back of the unit—easy to read in all conditions
Fast, accurate measurement through coatings—thanks to Multiple-Echo
Easy to use with three buttons—minimal training required
Sturdy design made of marine-grade aluminum—withstands depths of up to 300 m
Meets the requirements of classification societies—for certified inspection
Internal data logging (optional) – store measurement values for later analysis
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Cygnus Underwater Ultrasonic Thickness Gauge

The original ultrasonic meter for underwater inspections, perfect for measuring Leaks and coatings on ships and other vessels underwater structures.​
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Characteristics:

Industry Standard for Underwater Measurement
Multiple-Echo Technology for Precise Measurement Through Coatings
Extensive experience in use in harsh environments
Ideal for inspecting ships and structures
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Cygnus Mini ROV-Mountable Thickness Gauge – Ultrasonic

Ultrasonic rangefinder for underwater use – optimized for small ROVs
Specially designed for mounting on small observation ROVs, with or without a manipulator arm. This underwater sensor enables ultrasonic measurement of material thickness in locations that were previously difficult or impossible to reach with larger ROVs or divers—and there’s no need to remove surface coatings!

 

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Characteristics:

Mounted on small ROVs for use in confined spaces
Ideal for inspecting structures without removing coatings
Compact and rugged for underwater inspection
Easy to use
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High-Temperature Ultrasonic Probe

High-Temperature Sensor with Dual Elements for Ultrasonic Measurement
Designed for demanding environments—this dual-element ultrasonic transducer is ideal for in-service thickness measurement and corrosion monitoring in the oil and gas industry, refineries, the energy sector, and the process industry.

With exceptional durability and a robust design, the sensor enables accurate measurements on hot surfaces up to 300 °C, without the need for downtime or surface cooling.

It reliably measures remaining material thickness from 1.5 mm up to 250 mm, depending on temperature and material—and helps you detect fatigue, corrosion, and other material losses before they become critical.

Characteristics:

Designed for in-service thickness measurement at high temperatures
Perfect for inspections in extreme heat
Compatible with Cygnus meters
Provides accurate measurements under harsh conditions
Extremely durable with high repeatability
Wide measurement range for various materials
Ideal for corrosion monitoring in harsh industrial environments
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Twin Crystal Ultrasonic Probes

These taster are ideal for measuring corroded metals and can measure through coatings up to 1 mm thick. They offers both Echo-Echo and Single–Echo mode for flexible use.​

Characteristics:

Echo-Echo mode for measuring through coatings up to 1 mm thick
Single-Echo mode for direct measurement on exposed surfaces
Ideal for measuring corroded metals
Provides accurate and reliable results
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Single Crystal Ultrasonic Probes

This taster is particularly useful for to measure through coatings and provide accurate results on corroded surfaces.​

Characteristics:

Multiple-Echo Mode for Measurement Through Coatings
Accurate measurements even on corroded surfaces
Robust design for harsh working conditions
Reliable results under all types of measurement conditions

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If you're interested in Thickness Gauge Using Ultrasonic Technology or any of our other products, you can use the form to request a quote. Please don't hesitate to contact us if you have any questions about our products—we'll get back to you as soon as possible.

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