High Temperature Ex Probe

Twin Element Ultrasonic Probe designed for high-temperature, in-service, wall thickness and corrosion surveys across oil and gas, refining, energy and process sectors. Great wear resistance allows for use on hot surfaces up to 300°C. Measures remaining wall thickness from 2.5mm to 50mm - depending on temperature and material.

Engineered to be used with the Cygnus 1 Ex ultrasonic thickness gauge, the High Temperature Ex Probe can measure hot surfaces continuously without cooling period – reducing inspection time and facilitating more effective measurement!

The probe is designed for use with a special probe cable wrapped in a glass-fibre outer braid to protect the cable.

The probe and probe cable are sold separately, enabling lower replacement costs.

Frequency Crystal Ø5.0 MHz 8 mm (0.31 in) Nominal
Tip Size12 mm (0.47 in) Nominal
Range in Steel2.5 – 50 mm (0.1 – 1.97 in)
ConnectorsTwin Microdot 10-32
Surface Temperature50°C to 300°C (122°F to 572°F)

At Cygnus Instruments, we take immense pride in our pioneering spirit, having been at the forefront of developing digital Multiple Echo technology for over 40 years. Our expertise has culminated in a diverse array of ultrasonic thickness gauges, specifically tailored to meet the rigorous demands of industries operating at high temperatures.

For those in pursuit of unparalleled precision in high-temperature environments, our probes stand as a testament to our commitment to innovation and quality. Should you seek guidance or wish to explore our solutions further, do not hesitate to contact us on +65 6252 5909. Our highly trained team is dedicated to assisting you in finding the perfect tools to enhance your testing capabilities.

The Number One Supplier of Intrinsically-Safe Probes

Embarking on the journey to understand high-temperature probes for ultrasonic thickness gauges unveils a fascinating realm of precision and innovation. These specialised probes are not just tools; they’re your gateway to ensuring safety and efficiency in environments where ordinary instruments falter.

Ever wondered exactly what high-temperature probes are, or how they seamlessly integrate with devices like our Cygnus 1 Ex thickness gauge? Curious about the intricate workings and specifications that set our probes apart? Stay tuned as we delve into these topics, offering insights that might just spark your next big question. Feel encouraged to reach out and ignite a conversation with us.

What are High-Temperature Probes, and How Do They Work?

High-temperature probes are specialised accessories designed for ultrasonic thickness gauges, crafted to withstand and operate efficiently in extreme temperature environments. These probes, when attached to handheld devices, become indispensable tools in various applications requiring precise thickness measurements at elevated temperatures.

The core technology enables them to maintain accuracy and reliability, even when exposed to high heat, by employing advanced materials and sophisticated design. These temperature probes are particularly vital in industries where safety and precision are paramount, such as in the inspection of pipelines, pressure vessels, and structural components subjected to high thermal conditions.

The integration of these probes into our ultrasonic thickness gauges ensures that professionals have the necessary equipment to perform critical assessments safely and effectively, across a wide range of high-temperature applications.

Introducing Our High-Temperature Ex Probe

Navigating the challenging terrains of the oil, gas, refining, and energy sectors demands equipment that’s not just resilient but intelligently designed. Our Twin Element Ultrasonic Probe stands as the epitome of such innovation, specifically engineered for environments where high temperatures and corrosive conditions are the norm.

This isn’t merely a tough probe; it’s a strategic tool capable of enduring hot surfaces up to 300°C, facilitating precise wall thickness measurements ranging from 2.5mm to 50mm.

Perfectly complementing the Cygnus 1 Ex ultrasonic thickness gauge, this handheld marvel enables consistent measurements on high-temperature surfaces, significantly enhancing inspection efficiency.

Its durability is further assured by a cable sheathed in a special glass-fibre braid, designed for longevity. Moreover, the thoughtful separable design between the probe and its cable presents a cost-effective approach to maintenance, ensuring that your EX requirements are met with unmatched precision and reliability.


Our commitment to precision is reflected in the design of our temperature probes, particularly suited for high-temperature environments. Each probe is crafted with the following specifications to ensure unparalleled accuracy and reliability:

  • Frequency Crystal: 5.0 MHz 8 mm (0.31 in) Nominal, guaranteeing that our probes deliver precise readings with every use.
  • Tip Size: 12 mm (0.47 in) Nominal, designed for optimal contact and signal clarity.
  • Range in Steel: Capable of measuring thicknesses from 2.5 to 50 mm (0.1 to 1.97 in), our probes offer exceptional versatility for a wide range of applications.
  • Connectors: Fitted with reliable Twin Microdot 10-32 connectors, ensuring secure and stable connectivity.
  • Surface Temperature: Engineered to perform in extreme conditions, these probes operate seamlessly in surface temperatures ranging from 50°C to 300°C (122°F to 572°F), making them ideal for high-temperature scenarios.

These specifications highlight the superior performance and durability of our handheld ex probes, making them the perfect choice for professionals seeking accuracy in challenging environments.

Designed to Work in Tandem with the Cygnus 1 Ex Thickness Gauge

Introducing the Cygnus 1 Ex ultrasonic thickness gauge, our premier testing device engineered with intrinsic safety to redefine reliability in hazardous zones. This rugged, handheld sensor is the epitome of precision, designed to thrive in the most demanding environments. Whether it’s fuel depots, chemical plants, oil refineries, or hazardous storage areas, our gauge remains unrivalled.

Its seamless calibration process guarantees accuracy in critical measurements, ensuring you can rely on its readings when it matters most. Coupled with our specialised high-temperature probes, the Cygnus 1 Ex effortlessly navigates the complexities of Zone 0 Explosive Atmospheres, offering peace of mind in situations where safety cannot be compromised.

Trust in our gauges and probes to deliver unmatched safety and precision in environments where the risk is at its peak.

Why Should You Buy High-Temperature Ex Probes from Us?

Cygnus Instruments, nestled in the South West of the UK, has journeyed from its humble beginnings in ship hull non-destructive testing (NDT) to emerge as a leading light in the ultrasonic testing (UT) landscape, serving an array of industries globally.

This journey commenced in the 1970s, marking a pivotal transition from conventional methodologies to the groundbreaking “Multiple Echo” UT technique, renowned for its efficacy even through substantial marine coatings. Today, our legacy of ingenuity flourishes, with our expertise now spanning across the marine, oil & gas, and subsea IRM sectors, among others.

Our repertoire includes robust Echo-Echo and Single-Echo gauges, advanced data loggers showcasing live waveforms, and pioneering solutions like the Hatch Sure for leak detection and Flooded Member Detection units. At Cygnus Instruments, our commitment to excellence and innovation is unwavering, underpinned by our ISO-9001 certification and stringent intrinsically safe standards.

Customer Reviews

Discover what our valued clients say about our ultrasonic thickness gauges and service. Visit our reviews page to read firsthand testimonials and understand why we’re the trusted choice in the industry. Let their experiences guide your decision to partner with Cygnus Instruments for your precision measurement needs.

Get in Touch Now to Learn More About Our Products?

At Cygnus Instruments, we take pride in our 40+ years of pioneering expertise in developing high-temperature probes for ultrasonic thickness gauges. Our highly trained team is ready to assist you in selecting the perfect accessories and probes to meet your unique requirements.

Should you have any inquiries or need expert advice, please don’t hesitate to reach out to us on +65 6252 5909 or drop an email to sales@cygnus-instruments.sg. For your convenience, we also offer a contact form for personalised queries. Trust in our global experience and dedicated support to guide you through your high-temperature application needs.

T5BH-Ex: Ideal for hot surfaces up to 300 degrees C

Frequency Crystal Ø5.0 MHz 8 mm (0.31 in) Nominal
Tip Size12 mm (0.47 in) Nominal
Range in Steel2.5 – 50 mm (0.1 – 1.97 in)
ConnectorsTwin Microdot 10-32
Surface Temperature50°C to 300°C (122°F to 572°F)



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