Author: Nkosinathi Makhanya

Transformer Oil Analysis Services
We Provide Comprehensive Transformer Oil Testing & Support to Monitor Insulation Health, Detect Faults Early, and Ensure Operational Reliability.

Protect Your Assets – Extend Transformer Life – Prevent Costly Failures

Transformer oil testing is a critical pillar of effective asset management, providing early insight into the health, reliability, and remaining life of high-value electrical equipment. At Yellotec, transformer oil analysis is not just a laboratory service — it is a strategic reliability solution designed to help asset owners prevent failures before they occur.

Through our ISO-accredited laboratory, Yellotec delivers precise, trustworthy results that support confident decision-making. With fast turnaround times and expert diagnostics, potential faults such as insulation degradation, contamination, or thermal stress can be identified early, allowing corrective action long before they escalate into costly, unplanned outages. This proactive approach enables cost-effective preventive maintenance, helping organisations optimise maintenance budgets while maximising equipment availability

Our Key Services Include:

Professional On-Site or In-Lab Sampling

Expert collection of representative oil samples to international standards – safe, clean, and compliant.

Full Range of Transformer Oil Analysis Tests

Detailed laboratory testing covering essential parameters:
- Dissolved Gas Analysis (DGA) – Early detection of faults & arcing
- Moisture Content (Karl Fischer) – Critical for insulation integrity • Breakdown Voltage (BDV) – Measures dielectric strength
- Acidity & Neutralization Number – Assesses oxidation & degradation
- Interfacial Tension (IFT) – Detects contaminants & polar compounds
- Dielectric Dissipation Factor (Tan Delta) / Power Factor
- Furan Analysis – Paper insulation aging & remaining life estimation
- Color, Appearance, Resistivity, PCB Content & More
Get clear, actionable reports with expert interpretation and trending recommendations.

1-Day Practical Training Workshop “Understanding Transformer Oil Analysis

Hands-on session for your maintenance team:
- How to interpret test results
- Key parameters & fault indicators
- Best practices for sampling & trending
- Real-world case studies Empower your staff to make informed decisions and maximize transformer reliability.
Benefits Highlight
Why Choose Us?

Extend asset life & reduce replacement costs

ISO-accredited laboratory precision

Fast turnaround times

Expert diagnostics to avoid unplanned outages

Cost-effective preventive maintenance
By integrating transformer oil testing into a structured maintenance strategy, Yellotec helps clients extend asset life, reduce the risk of catastrophic failure, and ultimately lower replacement and lifecycle costs — ensuring electrical assets continue to perform safely, efficiently, and reliably for longer.

Ready to Safeguard Your Transformers? Contact us today for sampling kits, quotes, analysis packages, or to book your 1-Day Training!
February 4, 2026
Yellotec & FLIR Tech Tour 2026: Advancing Reliability Through Thermal Innovation
Yellotec, in partnership with FLIR, is proud to announce the Yellotec & FLIR Tech Tour 2026, taking place during the last week of May and early June. This nationwide tour is designed to bring cutting-edge thermal imaging and reliability solutions directly to key industrial regions across South Africa.

Through a combination of exclusive client site visits and invitation-only roadshow events, the tour will showcase how FLIR’s industry-leading technologies, supported by Yellotec’s technical expertise—help organizations improve asset reliability, enhance safety, and reduce unplanned downtime.

What to Expect

The Yellotec & FLIR Tech Tour focuses on real-world applications and hands-on engagement, giving attendees practical insights they can immediately apply within their operations. Highlights include:
- Live site visits demonstrating thermal imaging in operational environments.
- Roadshow events with expert-led discussions and technology showcases.
- Practical applications of predictive maintenance, condition monitoring, fault detection, and early fire detection.
- Direct engagement with Yellotec and FLIR technical specialists.
Tour Locations & Dates

The tour will visit key industrial hubs, with the following schedule:
- Gauteng Roadshow Event
  Gauteng
  28 May 2026
- Limpopo Roadshow Event
  Limpopo
  01 June 2026
- Mpumalanga Roadshow Event
  Mpumalanga
  05 June 2026
Additionally, exclusive site visits will take place in Cape Town, offering selected clients a closer look at FLIR solutions in live operating environments.

Why Attend?

This tour is ideal for maintenance managers, reliability engineers, electrical and mechanical specialists, and plant managers who want to:
- Detect faults early using advanced thermal imaging
- Improve maintenance planning and asset uptime
- Enhance operational safety and compliance
- Learn from proven, real-world industrial applications
Join the Tour

The Yellotec & FLIR Tech Tour 2026 is a unique opportunity to see industry-leading thermal and reliability technologies in action, where it matters most. Attendance for site visits and roadshow events is by invitation.

To secure your place or learn more, contact the Yellotec team or watch out for your official invitation. We look forward to connecting with you on the road and exploring the future of reliability together.
February 3, 2026
When “More” Becomes a Risk: The Hidden Cost of Over-Lubrication
Discover How Excess Lubrication Leads to Higher Costs, Equipment Damage, and Unplanned Downtime.

In this Atten2 Original Case Study, over-lubrication is shown to be just as damaging as insufficient lubrication, disrupting optimal machine operation.

Excess lubricant leads to leaks, contamination, increased energy consumption, heat buildup, seal damage, and even electric motor failures—resulting in unplanned downtime, higher maintenance costs, and environmental risks.

Read the Full Article

Article Highlights:
- Over-lubrication is as damaging as under-lubrication, leading to premature equipment failure.
- Excess lubricant increases pressure, causing seal damage, leaks, and contamination ingress.
- Higher energy consumption occurs as lubrication moves away from optimal operating conditions.
- Dirt and contaminants accumulate when surplus lubricant is exposed to the environment.
- Heat buildup and oil degradation accelerate wear and reduce lubricant effectiveness.
- Electric motors are at risk, as excess grease can enter windings and cause overheating or failure.
- Unplanned downtime and environmental costs rise due to leaks, cleanup, and maintenance issues.
Key Takeaway:

An excess of industrial lubricants, just like too little lubrication—can seriously harm machinery by disrupting optimal lubrication conditions, leading to leaks, increased energy use, contamination, accelerated wear, and even equipment failure. This highlights the importance of precise lubrication control and monitoring to maintain machine performance, reduce breakdowns, and avoid environmental and operational costs.
February 3, 2026
Yellotec Training Locations in South Africa

Yellotec offers industry-leading reliability and condition monitoring training at conveniently located facilities in Gauteng and KwaZulu-Natal.

Our training centres are designed to provide a professional, hands-on learning environment that supports both technical excellence and real-world application.

Whether you’re attending vibration analysis, condition monitoring, reliability engineering, or related technical courses, our locations ensure easy access for professionals across Southern Africa.

Gauteng Training Centre – Sandton

All training in Gauteng is conducted at Yellotec’s state-of-the-art training centre, equipped with modern facilities to support interactive learning and practical demonstrations.

Address:
No. 5 Stirrup Lane
Woodmead Office Park
Sandton, 2191

This central location offers easy access from major highways and is ideal for attendees traveling from Johannesburg, Pretoria, and surrounding areas.

KwaZulu-Natal Training Centre – Durban (Kloof)

To better serve customers in KwaZulu-Natal and the surrounding regions, Yellotec also offers training at our Durban-area location.

Address:
1 Judges Walk
Kloof, 3640

This venue provides a convenient option for professionals based in Durban, Pietermaritzburg, and the broader KZN region.

Contact Yellotec Training

For training schedules, course details, or assistance with bookings, please contact us:

Phone: 011 656 9111

Our team will be happy to help you choose the right course and location to meet your training needs.

Contact Yellotec

Visit our Training Page

January 23, 2026
A Legacy of Excellence: Celebrating Yellotec’s Award-Winning Journey

At Yellotec, we believe that consistent results, deep technical expertise, and unwavering commitment to our customers should speak for themselves. Over the years, that commitment has been recognised by some of the most respected global technology partners in our industry.

Each award we receive tells a story of trust, performance, and long-term partnerships built on delivering real value. Here’s a look at some of the milestones that mark Yellotec’s journey of excellence.

Best-in-Class FRS Technical Expertise (2025)

Fluke Reliability | FRS Partner Connect – Dubai, UAE

This award recognises Yellotec’s outstanding technical capability and leadership in Fluke Reliability Solutions (FRS). Being named Best-in-Class reflects the depth of our engineering knowledge, our ability to solve complex reliability challenges, and our focus on helping customers prevent failures before they happen.

It’s a testament to the skill of our technical teams and their commitment to delivering world-class reliability solutions across industries.

Fluke has recognized Yellotec as a Trusted Partner since 2009, reflecting a long-standing partnership built on reliability and performance excellence across Southern Africa.

Top Training Partner Award – Africa (2024)

Yellotec | Regional Recognition

Training is at the heart of sustainable reliability and maintenance excellence. Receiving the Top Training Partner Award for Africa highlights Yellotec’s role in empowering professionals with the knowledge and skills needed to operate, maintain, and optimise critical assets.

From condition monitoring to advanced diagnostics, this recognition reflects our passion for developing people, not just deploying technology.

FLIR R&D Science Platinum Partner of the Year (2024)

EMEA | Yellow Technical Services

Being awarded Platinum Partner of the Year by FLIR is a significant achievement that underscores our technical leadership, innovation, and close collaboration with one of the world’s leading sensing technology companies.

This recognition celebrates our contribution to advanced research, application excellence, and the successful delivery of FLIR solutions across the EMEA region.

Thank you to our partners, customers, and teams who make these achievements possible.

January 23, 2026
Connect with Yellotec’s Reliability Expert Team at MTE 2026
Don’t Miss Yellotec at the MTE Expos This Year

Yellotec is excited to be part of the Mining and Technical Exhibitions (MTE) taking place throughout the year. As a trusted partner to industries across Southern Africa, Yellotec invites visitors to stop by our stand for live product demonstrations and practical insights into Reliability and Online Condition Monitoring—shared by experienced industry professionals who understand real-world operational challenges.

We look forward to connecting with you at MTE this year:

April

16 Apr: Rustenburg, North West

March

10 Mar: Maun, Bostwana
13 Mar: Jwaneng, Bostwana

May

07 May: Middelburg, Mpumalanga
19 May: Zondereinde, Limpopo
21 May: Amandelbult, Limpopo

June

02 Jun: Sappi Saiccor, KZN
04 Jun: Richards Bay, KZN
18 Jun: Phalaborwa, Limpopo

July

07 Jul: Hotazel, Northern Cape
09 Jul: Kathu, Northern Cape
30 Jul: Steelpoort, Limpopo

August

06 Aug: Ngodwana, Mpumalanga

September

28 Sept: Kalumbila, Zambia
30 Sept: Solwezi, Zambia

October

02 Oct: Kitwe, Zambia
20 Oct: Springbok, Northern Cape
22 Oct: Aggeneys, Northen Cape

November

05 Nov: Lephalale, Limpopo

Expert Insights into Machine Health and Reliability

At the heart of Yellotec’s offering is a solution-oriented approach to improving machine health and reliability. Our focus is on helping organizations reduce unplanned downtime, extend asset life, and make smarter maintenance decisions through proven, condition-based maintenance strategies.

At the MTE Expos, visitors will have the opportunity to explore a wide range of advanced technologies, including:
- Online Vibration Analysis
- Handheld Vibration Solutions
- Laser Shaft Alignment
- Thermal Imaging
- Online Oil Analysis
- Motion Amplification
- Electric Motor Testing
- Ultrasound Technologies
These solutions work together to provide early fault detection, actionable insights, and greater visibility into asset performance.

Powered by Leading Global Brands

Yellotec proudly represents some of the world’s most respected reliability and condition monitoring brands. These include Fluke Reliability, Teledyne FLIR, RDI Technologies Inc., UE Systems, Mobius Institute, Noria Corporation, Atten2 Deep Monitoring Solutions, PCB Piezotronics, Gill Sensors & Controls, and many more. By combining best-in-class technologies with local expertise, Yellotec delivers reliable, fit-for-purpose solutions tailored to demanding industrial environments.

Visit Yellotec at MTE

Whether you are looking to modernize your maintenance strategy, implement online condition monitoring, or gain expert advice on reliability best practices, Yellotec’s stand at the MTE Expos is the place to be. Come and engage with our team, see the technology in action, and discover how smarter maintenance can drive safer, more efficient operations.
January 23, 2026
Condition Monitoring with VibGuard IIoT Helped Two Customers Avoid Over $1.7M in Damage and Downtime
Discover how VibGuard IIoT enabled condition monitoring that helped two customers prevent critical damage and unplanned downtime.

In this case study, real-time condition monitoring with VibGuard IIoT helped two industrial customers detect early equipment faults that periodic inspections would have missed, enabling timely identification of electrical and mechanical issues on critical assets.

Early, informed intervention allowed planned repairs instead of emergency failures, helping both customers avoid major equipment damage, unplanned downtime, and significant financial losses—demonstrating the value of proactive, data-driven maintenance.

Read the Full Article

Article Highlights:
- Continuous condition monitoring with VibGuard IIoT enables early fault detection beyond periodic inspections.
- High-resolution vibration data and advanced diagnostics identify subtle mechanical and electrical issues before failure.
- Early detection on critical assets allowed maintenance teams to intervene proactively and avoid unplanned shutdowns.
- Real-world case studies demonstrate how VibGuard IIoT supports a shift from reactive to predictive maintenance.
Key Takeaway:

Real-time condition monitoring with VibGuard IIoT enabled early detection and diagnosis of emerging machine faults, allowing maintenance teams to intervene proactively and prevent major equipment failures and unplanned downtime that would have otherwise resulted in significant operational losses.

The VibGuard IIoT:
January 14, 2026
Maximizing Wind Asset Performance: Insights from the United Wind Force and Atten2 Webinar.
Insights on Improving Wind Turbine Uptime Through Proactive Condition Monitoring

In today’s fast-paced renewable energy sector, wind power operators face constant pressure to boost efficiency and minimize downtime. On November 21, 2025, Atten2, in collaboration with United Wind Force (UWF), hosted an insightful webinar titled “Maximizing Wind Asset Performance.”

The session explored innovative strategies for managing onshore and offshore wind assets more effectively, with a spotlight on how advanced monitoring technologies can help operators reduce lost wind power and optimize turbine performance.

Below are the key takeaways and insights.

The Core Challenge: Lost Power and Limited Visibility

Wind operators increasingly deal with:
- Lost revenue from turbine downtime
- Competition in the spare parts market
- Difficulty accessing trustworthy condition data
With 67% of spares now non-OEM, owners are shifting away from rigid OEM models toward flexible, proactive maintenance strategies.

UWF’s Role: A Bridge Across the Aftermarket

UWF supports more than 47,500 turbines across Europe and Latin America by connecting turbine owners, OEMs, Independent Service Providers, and parts distributors.

Their supply mix highlights a diverse, responsive network:
- 54% direct
- 33% OEM
- 14% ISP
UWF partners with major industry players such as Vestas, Siemens Gamesa, GE Renewable Energy, Eickhoff, AMSOIL and more.

What this delivers: Faster access to parts, deeper technical expertise, and reduced downtime — all helping operators fight lost wind power.

Atten2’s Contribution: Turning Oil Data into Decisions

Atten2 specialises in real-time oil condition monitoring, with more than 3,000 installed sensors and over two decades of development.

Their monitoring philosophy is clear: Seeing transforms uncertainty into knowledge — and knowledge into better decisions.

Their flagship wind solution is the Wind Oil Sensor (WOS).

Wind Oil Sensor (WOS): Early Warning for Critical Components

The WOS, powered by Atten2’s OilWear® S technology (SHAPE SERIES), is an online sensor detecting particles and bubbles >4 microns in hydraulic fluids and lubricants. It converts raw fluid data into actionable insights on wear, contamination, and degradation, actively protecting gearboxes, hydraulic pitch systems, and yaw mechanisms.

Key Features:
- Particle Counting & Classification: ISO 4406, six size ranges (>4–>70 microns), supports NAS 1638.
- Advanced Analysis: Identifies wear type (fatigue, sliding, cutting) for particles >20 microns and discriminates bubbles.
- Oil Health Monitoring: Tracks degradation (%OD)
- Fluid Image storing: Supply images of oil being monitored.
- Easy Integration: IP65 casing, Ethernet RJ45 (Modbus TCP/IP, FTP), RS485 (Modbus RTU) for SCADA/PC/PLC connectivity.
Top Benefits:
- Fast, Accurate Insights: Up to 7× quicker condition assessments, +/-1 ISO code accuracy.
- Proactive Maintenance: Early detection prevents failures and downtime.
- Extended Fluid Life: Detects degradation and contamination.
- Operational Efficiency: Simple commissioning, turbine-ready deployment, lower maintenance costs.
- Data-Driven Decisions: Stores 10,000 tests, 100 images, with temperature monitoring.
Real-World Application Cases

Two case studies demonstrated how Atten2’s sensors enable proactive, data-driven maintenance.

Case 1: Gearbox Damage Monitoring
- Background: A ZF GPV442 gearbox showed advanced macropitting (ISO 15243 Category 4) confirmed via boroscope.
- Monitoring: RSMK tracked oil cleanliness over 93 days (Aug 22–Oct 11) at full turbine power.
- Findings: Stable particle levels indicated no further damage progression, later verified by boroscope images.
- Outcome: Combined online monitoring and periodic inspections ensured safe operation and informed planning.
Case 2: Particle Counting in Gearbox Testing

For a major wind gearbox manufacturer, long flushing and testing periods were a challenge.

Benefits: Faster testing, improved filtration performance, and reduced operational strain.

Objective: Achieve ISO 4406 cleanliness of 16/14/11.

Solution: Atten2’s particle counters outperformed competitors (HYDAC, Laser), with significantly lower counts during testing.

The webinar made it clear that the future of wind asset performance lies in preventing issues before they cause downtime. Real-time visibility into turbine condition enables operators to plan maintenance confidently, protect key components, and keep turbines producing power. Ultimately, reducing lost wind power is less about reacting to failures and more about using accurate data to stay ahead of them — improving uptime, reliability, and overall return on investment.

Atten2’s Additional Solutions:

OilWear: Real-time particle quantity and quality measurement.

SMK: OilWear tech integrated into filter carts.

RSMK: High-speed version for test benches and labs.

OilCMS: Offline suitcase for particle analysis.

OilHealth Probe: Monitors fluid degradation.

OilMoisture: Measures water content in PPM.

OilHealth Probe MAX & OilStreak: Advanced degradation and moisture monitoring via bypass installation.
December 18, 2025
Discovering Hidden Air Leaks with Acoustic Imaging
Explore the FLIR Application Story showing how acoustic imaging helps manufacturers uncover hidden compressed-air losses and improve plant performance.

In this FLIR application story, you’ll see how acoustic imaging technology helps manufacturers uncover hidden compressed-air losses and improve overall plant performance. For the full story and deeper insights, click the link to read the complete article on compressed-air leaks in automotive manufacturing.

Modern acoustic imaging tools like the FLIR Si-Series are changing how manufacturers detect leaks. They help teams quickly spot issues and plan repairs more effectively, without disrupting production.

Read the Full Article

Article Highlights:
- Automotive plants use large amounts of compressed air, making hidden leaks common.
- Undetected leaks raise energy costs, reduce efficiency, and strain compressors.
- Noise and complex pneumatic systems make traditional leak detection difficult.
- Acoustic imaging cameras, like the FLIR Si124-LD Plus, quickly locate even tiny leaks.
- They work during normal operations and require minimal training.
- Built-in analytics estimate leak size, energy loss, and cost impact.
- Early leak detection saves energy, reduces emissions, and boosts productivity.
Key Takeaway:

Proactively using acoustic imaging, for example with the FLIR Si-Series of cameras — to find and fix hidden compressed-air leaks in automotive plants helps companies avoid waste, cut energy and maintenance costs, ensure reliable production pressure, and improve productivity and competitiveness.

View our Acoustic Imaging Range:

FLIR Si2x-LD

FLIR Si12x-Pro

FLIR Si2-PD
December 5, 2025
Early Fire Detection to Protect Power Grids with Thermal Monitoring
Discover how early fire-detection technology is transforming the reliability and safety of critical power infrastructure.

FLIR’s latest Innovate & Inspire article explores how automated thermal monitoring is helping safeguard Ireland’s energy grid and prevent high-impact failures before they happen. It’s a quick, insightful read — click the link to view the full article and dive into the innovation behind keeping the lights on.

Moneypoint Power Station supplies a large portion of Ireland’s electricity, and a fire could disrupt up to 25% of the national grid. To mitigate this risk, ESB Energy and Butler Technologies deployed a thermal-monitoring system using FLIR A500f/A700f sensors and Latitude software, providing continuous, real-time oversight of high-risk areas.

Read the Full Article

Article Highlights:
- 24/7 visibility: Fixed thermal cameras continuously scan high-risk areas — no more waiting for weekly manual inspections.
- Fast alerts: When temperature anomalies are detected, the system sends sub-second alerts, enabling shutdown within ~15 seconds.
- Deep insights: Each thermal image has 16,000+ reference points, giving highly granular condition-monitoring data (transformers, valves, cabling).
- Integrated solution: Fully native design (hardware + software + UI); no third-party components to manage.
- Future ready: The system is built to scale with Ireland’s transition to renewables, with AI-powered anomaly detection and predictive maintenance on the roadmap.
- Grid resilience: This setup is a model for safeguarding critical infrastructure — potentially rolling out to 500+ substations.
Key Takeaway:

Thermal automation isn’t just about fire safety — it’s a powerful tool for protecting national grids. By detecting heat anomalies early, Ireland’s Moneypoint Power Station is boosting resilience, improving response times, and setting a blueprint for future energy infrastructure.

Read the Full Article
November 25, 2025