Liquid Level Measurement

Accurate, Reliable Monitoring for Transformer Oil Levels

Qualitrol’s Liquid Level Indicators are designed to provide continuous, dependable measurement of oil level inside transformer main tanks, conservator tanks and load tap changer compartments. With rugged construction, flexible mounting options and precise display mechanisms, these indicators support safe and reliable operation across a wide range of transformer applications.

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Application Overview

Our indicators are used for monitoring liquid levels within transformer conservators, main tanks and LTC compartments, as well as other vessels where maintaining appropriate fluid volume is critical. They help operators ensure proper oil levels, prevent overheating or insulation issues, and support alarms or limit functions through built‑in switching options.

What We Solve For

Transformer performance and longevity rely heavily on maintaining the correct oil level. Our Liquid Level Indicators address common challenges—such as inaccurate readings, limited visibility, environmental exposure and monitoring difficulty by providing:

Clear, amplified visual indication
Rugged, corrosion‑resistant construction
Multiple switching options for alarms and level limits

These features support better asset protection, reduced maintenance downtime and improved system reliability.

TECHNICAL

Features & Functionality

Functionality & Options

Multiple Float Mechanisms: Choose between gear‑driven (042/045) or lever‑driven (032) floats depending on space and visibility requirements.
Dial Options: Industry‑standard or custom‑engineered dial markings available.
Electrical Configurations: Up to 3–4 switches depending on model; SPDT or SPST switching; Wide array of electrical connectors including quick‑connect, weatherproof, ANSI, military‑style and terminal box options;
Lens Choices: Standard UV‑stabilised polycarbonate, glass or tempered glass.
Hazardous Location Approval: 045 models are UL listed for Class 1, Div 2 environments.
SCADA Integration: Optional 039 remote enclosure provides 4–20 mA or 0–1 mA outputs for automated oil‑level monitoring.

Key Technical Specifications

Mounting: Flange mount (032/042/045) or M50 thread (44712/34725)
Dial Diameter: 5.5" (140 mm), 5.9" (150 mm) or 9.8" (250 mm) depending on model
Float Mechanisms: Gear‑driven or lever‑driven options
Switches: Up to 3 (032/042/045) / up to 4 (44712/34725)
AC Switch Rating: Up to 10A @ 125/250/480 VAC
DC Switch Rating: Up to 0.5A @ 125 VDC and 0.25A @ 250 VDC (varies by model)
Output Signal (optional): 4–20 mA or 0–1 mA
Dielectric Strength: 1,500–2,000 VAC depending on model

EXPERIENCE

Our Projects featuring Insulect Transformers

Explore our project highlights to see where Insulect Transformers are making an impact.
For tailored advice on whether this solution suits your network, please connect with our team here.

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ADVANTAGES

Why Choose Qualitrol’s Liquid Level Indicators

The Qualitrol’s Liquid Level Indicators are built for dependable, long‑term monitoring of transformer oil levels, helping maintain safe fluid conditions and reduce operational risks. Their durable design, flexible options and clear visual display make them a reliable fit for many transformer applications.

Clear, Reliable Monitoring

Qualitrol’s precise gear‑ and lever‑driven mechanisms enhance visibility and accuracy, ensuring operators can quickly assess oil level at a glance—even from a distance.

Built for Harsh Environments

With corrosion‑resistant materials, UV‑stable lenses and durable construction, these indicators deliver long‑term performance in demanding outdoor and industrial conditions.

Flexible & Fully Customisablea

A wide range of dial markings, electrical connectors, alarm switch options and mounting configurations ensures the device can be tailored to fit any transformer design or operator requirement.

IMPLEMENTATION

Services & Support

Insulect offers comprehensive services and support for the products we manufacture and 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 DESIGN

Our team utilises advanced technology and industry knowledge to develop innovative and efficient high-voltage switchgear solutions, customised to fit the unique requirements of each project.

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 ensure that every high-voltage switchgear 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.

FACTORY VISITS

We facilitate client visits to our local manufacturing sites here in Australia, as well as overseas, for initial inspection as well as factory acceptance testing.