Temperature Measurement

Advanced Oil & Winding Temperature Monitoring for Modern Transformers

The AKM345 Gen3 OTIWTI™ Temperature Indicators is a next-generation mechanical temperature indicator designed for oil and winding temperature monitoring in transformers of all classes. It features integrated winding temperature simulation using bellows technology, enhanced ingress and corrosion protection, and digital communication capabilities to support modern transformer monitoring systems.

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Application Overview

The AKM345 Gen3 OTIWTI™ Temperature Indicators are used in transformer systems where reliable oil and winding temperature measurement is essential. Suitable for distribution, medium‑power and large‑power transformers, they support cooling control, alarm triggering, digital communication and remote monitoring. Integrated winding temperature simulation eliminates the need for external heaters or separate accessories, simplifying installation and providing precise thermal representation.

What We Solve For

Accurate transformer temperature measurement is critical for preventing insulation damage, extending equipment life and ensuring safe operation. These indicators address common pain points by providing:

Reliable temperature monitoring for both oil and simulated winding temperatures
Enhanced operational safety through independent alarm and control switching
Support for modern digital systems via RS‑485 Modbus and dual remote outputs
Long‑lasting performance supported by robust construction and high‑grade corrosion protection

This reduces risk of overheating, supports better decision‑making and simplifies integration with asset‑monitoring platforms.

TECHNICAL

Features & Functionality

Functionality & Options

Improved Installation Design: Hinged or removable cover allows quick wiring and easy access in confined cabinet or bracket locations.
Multiple Mounting Styles: Choose from stainless‑steel anti‑vibration mounts, seismic mounts or universal mounting options.
Switching Adjustability: Standard 12°C differential or adjustable from 5°C to 25°C, depending on operational cooling requirements.
Enhanced Visual Indication: Updated max‑temperature pointer design reduces risk of accidental bending or damage during installation.
Digital Integration Ready: Fully supports modern digital transformers through Modbus communication and dual analog outputs.

Key Technical Specifications

Indication Accuracy: ±2% of full dial range
Temperature Range: 0°C to 150°C
Switching Accuracy: ±3% of full range
Remote Outputs: Pt100, 4–20 mA, dual 4–20 mA, or 4–20 mA + 0–5
Communication: RS‑485 Modbus
Dielectric Isolation: 2000 VAC (switches), 500 VAC (remote outputs)
Ingress Protection: IP66
Corrosion Rating: C5‑High (ISO 12944)
Operating Temperature: –40°C to 70°C (standard), –60°C to 70°C (polar)
Humidity: 95% non‑condensing at 95°C
Standards: IEC 60076‑22‑1

EXPERIENCE

Projects featuring Qualitrol Transformer Measurement & Control

Explore project highlights to see where Qualitrol Transformer Measurement & Control is making an impact.

For tailored advice on whether this solution suits your network, please connect with our team here.

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End Winding Discharges Detected with Partial Discharge Monitoring

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Advanced Transformer Bushing Monitoring: Preventing Failures Through Real-Time Insights

ADVANTAGES

Why Choose Qualitrol Temperature Indicators

The Qualitrol Temperature Indicator was designed for accurate, dependable measurement of both oil and winding temperatures, making it easier for operators to protect transformer health, manage cooling systems and support digital monitoring requirements.

High Accuracy with Proven Technology

The bellows‑based sensing system delivers reliable long‑term accuracy, supported by integrated winding simulation to ensure temperature readings reflect real transformer conditions.

Ready for Modern Digital Transformers

With Modbus communication and multiple remote‑output options, the indicator supports both traditional and digitally enabled networks, making system integration simple and future‑ready.

Built Tough for Harsh Environments

IP66 protection, C5‑High corrosion resistance and a rugged enclosure design ensure long service life—even in severe climates—while the polar option enables operation down to –60°C.

IMPLEMENTATION

Services & Support

Insulect offers comprehensive services and support for the products we specialise in, enhancing value for local utilities, major energy users, equipment manufacturers, and service operators.

LOCAL TECHNICAL TEAM

Our local technical team provides exceptional support and expertise, ensuring quick response times and personalised service to tackle any challenges that may arise during project execution.

ENGINEERING EXPERTISE

Through Qualitrol, our team utilises advanced technology and industry knowledge to assist customers.

PROCUREMENT & LOGISTICS

We facilitate smooth procurement and logistics processes by sourcing from trusted, proven partners and coordinating timely deliveries, ensuring projects remain on schedule and within budget.

TESTING & COMMISSIONING

Professional testing and commissioning support ensures that every transformer measurement & control system functions safely and reliably, adhering to all regulatory standards and client expectations.

TURNKEY PROJECT DELIVERY

We are able to oversee every phase from concept to completion, providing comprehensive solutions that simplify complex projects and ensure successful outcomes.