Temperature Is Our Business

Our Temperature Sensors receive SIL 3 Certification

SIL Cert

In April we were pleased to receive certification from Exida to show that our Thermocouples and RTD Temperture Sensors have obtained the level of integrity to meet SIL 3 standards and have been rated to IEC 61508.

All of our products are produced in our state of the art factories and are manufactured to the most stringent standards possible. And we are delighted that this certification along with others we hold proves that our Sensors and Heaters can be trusted for accuracy and reliability in the most demanding environments. 

VortexWell – Solving Resonance Failure Issues



At Okazaki, we’ve always made it our absolute focus to solve issues that we know our clients constantly face.  So, when it comes to solving thermowell resonance failure issues, we’ve always strived to use the latest technological advances to find the latest solutions.  Which is why since the introduction of the VortexWell thermowell in 1999, our engineers have meticulously developed our solution; ensuring you benefit from market-leading temperature measurement.

A simple and effective solution, we recognise that the industry has been facing several issues when it comes to vortex induced resonance failures.  This is why we’ve continued our extensive research and development to find the most cost-effective and vastly technically advanced product available to you.  We also know that you want to find a solution that easily assesses and calculates potential issues.  The VortexWell meets all of these requirements and more.

Through its clever helical strake design, the VortexWell is able to encounter the issues faced by fluid flowing around a blunt object in its path; forming vortices downstream of the object – also known as vortex shedding.  We’re fully aware of the implications from the vortex shedding frequency or Stroudhal frequency approaching the thermowell natural frequency.  When faced with this situation, the tip displacement and stresses become greatly magnified; causing the thermowell to fail.  We also know that even when the thermowell has passed the ASME PTC 19.3 TW-2010 regulation, failures can still happen.

In considering alternative solutions to solve the original cause of the problem of vortex induced vibration rather than just masking the symptoms, our engineers looked at several ideas including adding a vortex suppression device, avoiding resonance, increasing damping and using a streamlined cross section.

Eventually our engineers discovered that incorporating a helical strake as a vortex suppression method certainly delivers the best performing and safest thermowell solution available.  Through this technique, engineers found that not only the flow disturbance was minimised thanks to its aerodynamic tip, but it also ended the possibility of vortex induced vibration.

If you’re interested in finding out how Okazaki can help you deal with your temperature challenges, contact us on sales@okazaki-mfg.co.uk.

Image 1: Showing flow around a standard Thermowell

Standard Thermowell Flow

Image 2: Showing flow around our VortexWell Thermowell

VortexWell Flow


Out of this World Sensors and Heaters

Mars Rover

Out of this World Sensors and Heaters

When it comes to some of the most challenging environments known and even unknown to man, there can be few locations that are as challenging as the moon.  So, when Okazaki was challenged with delivering heaters and sensors for the NASA Mars Curiosity Rover, this certainly presented a worthy proposition.

At Okazaki, we’ve always understood that our valued clients across the globe require extreme levels of product reliability.  We know that time is money, and any impact on production or service can result in serious implications both financially and regarding safety.  We also know that our clients appreciate that world-class quality is our benchmark.

For the purpose of the NASA Mars Curiosity Rover, NASA opted to use Micropak heaters in order to heat the sampling tubes inside the vehicle.  The challenge here was to benefit from greater flexibility when space is particularly paramount. With a small bend radius as a ratio to the outside diameter of heater, the units proved flexible thanks to their ability to be coiled and freely formed into complex and desired shapes.

As part of their investigations, demands on working in an extreme temperature range were certainly met thanks to the operating range of -200 to 500°C which can be achieved by the Micropak heaters.

A further benefit to the project was that the Micropak heater has the same diameter hot and cold sections.  Also, it has no external join which reduces the risk of mechanical joint failure while at the same time as being suitable for being installed in vacuum sealing flanges.

At Okazaki, our engineers and developers are constantly looking to use the latest technical advances to improve the efficiency and safety of our products.  For more info on how our heating and temperature sensors can be used in extreme working environments, please contact Leona Lilford



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Contact Details

t: +44 (0)2920 814 333
e: sales@okazaki-mfg.co.uk

Manufacturing Company
UK Limited

Ashwood House,
66 Cardiff Road,
Taffs Well
Rhondda Cynon Taff
CF15 7QE
United Kingdom