The substation-grade online passive dryer for your most critical assets.
InsulMax is a substation-grade online passive dryer that protects the transformer by continuously addressing the conditions that accelerate insulation aging. If you’re specifying, installing, or commissioning a new transformer (or replacing a critical unit), don’t wait for moisture to become an end-of-life problem.
- Continuous Moisture Control
- Hydrogen Gas Monitoring
- Wireless Remote Reporting to Transformer Dashboard
- Recyclable Filtering Technology
Address Moisture and Oxidation—24/7/365
SDMyers’ patented online passive dryer technology is a preventive, always-on approach that controls transformer aging factors and monitors hydrogen gas levels. The result is extended asset life, reliable operation, and peace of mind.
Manages moisture to keep insulation dry and stable.
Reduces oxidation drivers and limits acids/byproducts as they form.
Removes particles that degrade dielectric performance.
Adds fault-awareness via hydrogen gas sensing for early detection.
Reports data remotely for dashboard trending and status alerts.
Whether you manage a single unit or an entire fleet of transformers, connect with a dedicated transformer testing expert for a free consultation.
Why Choose InsulMax?
Protect Transformer insulation from day one
When specified at commissioning, InsulMax keeps transformers moisture-managed from day one. This effectively lowers lifecycle risk and reduces future remediation needs by integrating a moisture- and oxidation-management plan into your most critical assets.
COntinuous moisture control with patented technology
InsulMax continuously conditions transformer oil using recyclable filtering media—our patented green technology—to help maintain stable moisture levels over time. A built-in moisture monitor tracks moisture in percent saturation and ppm, giving you clear visibility into the transformer's moisture status while the system runs.
Built-in hydrogen sensor warning layer
InsulMax includes an integrated hydrogen sensor that provides early warning of developing transformer issues. Hydrogen levels are monitored as part of the system’s condition data and can trigger alarms and notifications, helping your team spot changes sooner and respond with confidence.
Remote monitoring and alerts
InsulMax provides key operating and condition data—bottom oil temperature, moisture, pump pressure, hydrogen level, run status, and alarms—with notification options by email or phone. Remote monitoring and control are supported through a wireless cellular connection.
Technical Specifications
How InsulMax Works
“For less than the cost of a single service call per month, InsulMax provides continuous moisture control, acid removal, particle filtration, and hydrogen monitoring—protecting assets worth millions, around the clock.”
— Bob Rasor | Director, Transformer Services
CASE STUDY
Ten Years of Transformer Life Extension: A Field Validation of InsulMax®
Four critical power transformers—two generator step-up units (GSUs) and two auxiliary transformers, each 30–50 years old—were selected for a long-term InsulMaxTM life-extension program. Over 10 years of annual monitoring, every aging-related oil quality metric either held steady or improved, validating InsulMax as a proven strategy to maximize transformer reliability and extend asset life.
This case study documents the results (the data, the economics, and the engineering rationale) for engineers, asset managers, and owners who prioritize the long-term resiliency and reliability of their critical infrastructure.
Download the Free Case Study
Frequently Asked Questions on InsulMax
What is InsulMax?
InsulMax is a substation- or utility-grade online passive dryer. It is a permanently installed, always-on moisture management system designed to protect the transformer insulation system by continuously addressing conditions that accelerate insulation aging, supporting a "moisture-managed from day one" approach. It
Why does installing it on a new transformer on "day one" matter?
The insulation system begins to age as soon as a transformer is energized. Managing moisture early helps prevent compounding insulation aging and supports long-term reliability. It is designed to manage moisture, reduce oxidation drivers (acids/sludge/byproducts), and maintain continuously reliable oil conditions that protect paper insulation and reduce the risk of premature end-of-life.
What does InsulMax monitor and report?
InsulMax provides key operating and condition data, including bottom oil temperature, moisture level (percent saturation and ppm), pump pressure, hydrogen gas level, run status, and alarms.
Does InsulMax include a hydrogen sensor? What is it for?
Yes. InsulMax includes a hydrogen gas sensor that provides an early-warning layer for developing issues, with thresholds informed by the transformer’s dissolved-gas history.
How is InsulMax monitored remotely?
InsulMax supports remote monitoring and control via a cellular connection (remote VPN/cellular monitoring) and provides access to SDMyers’ Transformer Dashboard to review ongoing assessments and operations.
What is the "green technology" referenced with InsulMax?
InsulMax uses recyclable filtering media in its columns, described as patented "green" technology, which is reused, producing zero waste. From our case study on four field units over 40+ operating years, filtering columns required just six total exchanges—averaging roughly one exchange per unit per decade.
2026 IEEE Show Special – 20% OFF
If you are specifying, installing, or commissioning a new transformer, InsulMax is designed to keep the insulation system moisture-managed from day one. Fill out the form below to connect with a transformer specialist at SDMyers to discuss your InsulMax application.
IEEE Show Special: 20% off MSRP. Offer valid through May 31, 2026. Installation not included (~$6K).
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