Magnelab Blog


    Summary The Magnelab SCT series of current transformers (CT’s), also known as current transducers, are designed to produce a safe usable output when properly installed around a primary conductor carrying AC current. In most cases the output is pre-burdened to a small output voltage linearly proportional to the primary current. Although a non-burden version is […]

    August 27, 2020 - 0 comments
  • DISTRIBUTECH 2020 We’re looking forward to seeing you next week at DistribuTECH! You can find us at booth #3062 with our distribution partner, Aim Dynamics. If you haven’t had a chance to register yet, you can still do so here. If you would like to schedule a meeting with one of our representatives at the […]

    January 28, 2020 - 0 comments
  • New Switch Gear Current Transformer (Coming Soon)

    Magnelab Switch Gear RCT-35SW solid Rogowski coil current sensor measures AC current up to a peak of 15,000 Amps. The rugged, epoxy encapsulated construction makes the senor ideal for switchgear applications in harsh enviroments. Features: • Inputs: 1000 A, peak 15,000 A • Outputs: 140 mV at 1000 A at 60 Hz • DCR: 102 […]

    January 28, 2020 - 0 comments

    LONGMONT, Colorado – Magnelab, Inc., a manufacturing and design company, under the parent company Manutech, Inc., announces today the company is officially seeking to acquire a related company, or to purchase a line of products to expand manufacturing and development opportunities. Manutech owns and operates several companies in the U.K., Colorado, Boston, New Jersey, and […]

    January 17, 2020 - 0 comments
  • Measurement of Below 20 Amps with Magnelab RopeCT and Integrator

    Extending Leads with Rogowski Coils and Integrators Magnelab Rogowski coils and associated integrators are designed for 50 Hz and 60 Hz measurement. At such frequencies the noise becomes as issue for measuring current below 20 amps. The solution to low current measurement is to eliminate the source of the electrical noise. While twisted pairs reduce […]

    June 6, 2019 - 0 comments
  • JUST RELEASED UL-Listed Current Transformers

    Magnelab is proud to announce the release of its new UL Listed product line! This product line release is the culmination of years of work to release a line of CTs with the following: * UL 2808 Listing * Hinged, split-core design (complementing our current pull-apart series) * IEC 61889-2 0.5 Class   We currently […]

    March 12, 2019 - 0 comments
  • Magnelab Exhibits at DistribuTECH in New Orleans

    Magnelab at DistribuTECH DistribuTECH 2019 ran in New Orleans, Louisiana from Tuesday, February 5th through Thursday the 7th.  Magnelab sales and marketing VP’s Eric Christensen and Shawn Cavalli exhibited Magnelab products and services, such as our current transformers, current sensors, flexible sensors, and split-core sensors. Some of the highlights of the event are as follows: […]

    February 20, 2019 - 0 comments
  • Rogowski Coil Linearity and Accuracy with and without Integrators

    Rogowski Coil Linearity and Accuracy with and without Integrators Magnelab first introduced Rogowski coils to the market in 2009 as a current monitoring solution that would work well in tight spaces due to the flexible nature of the coil. In addition to flexibility, there are several other advantages to using Rogowski coils. Without question, Rogowski […]

    December 12, 2018 - 1 comments
  • Magnelab’s 50th Anniversary Celebration Video Link

    Magnelab has provided the highest quality current sensors and custom magnetics for over 50 years. We recently celebrated this milestone by inviting Magnelab’s founder, employees, and customers to a celebration in Longmont, Colorado. The following video is part of that celebration. For access to the video, please copy and paste the following link in your […]

    October 3, 2018 - 0 comments
  • MAGNELAB’S 50th Anniversary Celebration

    Held at Fox Hill Country Club Longmont, CO Friday, August 10, 2018 Dear Colleagues, We are among the fortunate few companies our size to be able to celebrate 50 years of service to our industry and our community. First we need to contribute our success to the founder Carl Forsberg, a brilliant engineer who built […]

    August 22, 2018 - 0 comments
  • Video – Magnelab UL Listed Rogowski Coils

    New Video Featuring Magnelab UL Listed Rogowski Coils Please watch Magnelab UL listed Rogowski coils short 2-minute video at the following link: If you like the video, please like it and subscribe to our page at Magnelab, Inc. For more information contact us at, or call us at 303-772-9100 This video features Eric […]

    January 25, 2018 - 1 comments
  • Magnelab’s First Line of UL Listed Rogowski Coils

    UL Listed Rogowski Coils UL Listed Versus UL Recognized Rogowski Coils As one of the world’s most respected designers and manufacturers of AC current sensors, Magnelab ( is pleased to lead the way with production of our first line of Rogowski coils to receive UL listed classification. As a matter of fact, Magnelab’s upgraded line […]

    January 3, 2018 - 0 comments
  • Real-Time Electricity Savings for Schools Using Magnelab Current Transformers

    Dara Ward Energy & Sustainability Manager St. Vrain Valley Schools Real-Time Electricity Savings for Schools Using Magnelab Current Transformers Introduction By installing flexible Magnelab current transformers in combination with eGauge real-time electricity monitoring devices, St. Vrain Valley School District (SVVSD) has been effective in pursuing advanced energy conservation and behavior programs. If executed properly and […]

    October 3, 2017 - 1 comments
  • Magnelab at World Energy Engineering Congress (WEEC) September 27-28

    Magnelab Exhibit at World Energy Engineering Congress (WEEC) in Atlanta, GA, Booth #322 Magnelab announces an exhibit at the World Energy Engineering Congress in Atlanta, GA on September 27-28, 2017. In addition, we will demonstrate our  improved Rogowski coil (Rope CT) with 0.5% linearity accuracy. Also, we will show our new revenue grade CT system […]

    September 1, 2017 - 0 comments
  • Magnelab Rogowski Coils Video

    New Video Featuring Eric Christensen and Victor Fehlberg discussing Magnelab Rogowski Coils Please watch Magnelab’s short 4-minute video at the following link: If you like the video, please like it and subscribe to our page at Magnelab, Inc. For more information contact us at, or call us at 303-772-9100 This video features Eric […]

    August 17, 2017 - 1 comments
  • Magnelab at Sensors Expo June 28-29, 2017

    Magnelab at Sensors Expo in San Jose, CA at Booth #1412 Magnelab announces our exhibit at the Sensors Expo and Conference in San Jose, CA on June 28-29, 2017. In addition, we will demonstrate our new, improved Rogowski coil (Rope CT) with 0.5% linearity accuracy. Also, we will show our new revenue grade CT system and our […]

    June 12, 2017 - 0 comments
  • New, Improved Rogowski Coil Accuracy

    Contact Magnelab for Improved Rogowski Coils Magnelab announces the accuracy of each of our Rogowski coils (Flexible Rope CT’s) is significantly improving. As a matter of fact, starting on June 1, 2017, each standard Rogowski coil Magnelab manufactures will meet a +/- 0.5% linearity accuracy benchmark. Of course, this is a significant improvement over the […]

    May 24, 2017 - 0 comments
  • Magnelab at West Coast Energy Management Congress June 7th and 8th, 2017

    Free VIP Guest Ticket For a free VIP Guest ticket to EMC, click the banner at the top of our home page here on our website or copy and paste this link into your browser: Magnelab Exhibits New Products Magnelab announces an exhibit at the West Coast Energy Management Congress in Long Beach, CA […]

    May 3, 2017 - 0 comments
  • How to Determine Core Size in Current Transformers

    How to Determine Core Size in Current Transformers Ever wonder how to determine core size in current transformers? The following article by Eric Christensen and George Langer examines the factors related to current transformer cores. Be sure to contact Magnelab at 303-772-9100 for all your current transformer needs. To determine the correct core for a […]

    April 3, 2017 - 3 comments
  • Magnelab and ReNew Our Schools

    Since 2007 Magnelab and eGauge systems have supported the Center for ReSource Conservation’s ReNew Our Schools program.  That program organizes groups of between 9 and 15 schools into one month energy conservation competitions and provides real-time monitoring for the students to receive feedback on the impact of their behavior.  District energy managers then go on […]

    March 15, 2017 - 0 comments
  • Contact Magnelab to Help Alleviate Equipment Failure and Save Money with Monitoring

    Most organizations require that electrically powered equipment operates properly. Grocery stores rely on coolers and freezers, factories rely on conveyors and machines and office buildings rely on air conditioning and heating. Few companies operate without electricity. Avoid Costly Inventory Loss or Production Stoppage In most organizations, equipment failure negatively affects the operation of business due to […]

    March 15, 2017 - 1 comments
  • Magnelab at GlobalCon March 22-23, 2017

    Magnelab Shows New Products Magnelab announces an exhibit at GlobalCon in Philadelphia, PA on March 22-23, 2017. We will show-off new products, in addition to the quality CT’s that industry professionals have come to associate with the name Magnelab. High Accuracy and Wireless CT’s Magnelab will demonstrate new products: RGS Revenue Grade Transducer Wireless CT’s Current Products Magnelab […]

    February 16, 2017 - 2 comments
  • Core Drivers of Energy Use in Buildings

    Perhaps one of the most important factors in the energy consumption equation is also one of the most overlooked: buildings. In many ways, buildings are essential to a sustainable future, particularly when you consider their architecture, design, construction, operation, and all the many activities that take place under their roofs. Growing energy awareness and reducing […]

    October 24, 2016 - 0 comments
  • Tracking how Electric Vehicles charging effect residential power usage.

    This is a guest blog by Philippe Marseille. In it he explains his installation and setup of an eGauge system with Magnelab current sensors to monitor the power consumption of his Tesla S 85D (when charging), in addition to the overall consumption of his house. Hi, I like to track my energy usage (from my […]

    September 15, 2016 - 0 comments
  • The benefits of high quality electrical usage interval data

    This paper will describe how to use low cost components to gain actionable information and save money on commercial electric demand rates.  Case study examples are provided from projects in Colorado. Understanding electrical load profiles and demand rates Utilities typically apply demand rates to commercial customers.  Under such rates businesses are billed for their demand […]

    September 12, 2016 - 1 comments
  • How to Extend the Life of Your Equipment

    Practical tips for monitoring and regulating power consumption Large, 3-Phase motors, compressors, pumps, and equipment used in an industrial setting benefit from operating at certain voltages (and amperages). While managers and machine operators may be aware of the OEM specs and operational guidelines, few practice practical condition and energy monitoring over the lifetime of their […]

    August 30, 2016 - 2 comments
  • How Energy Monitoring Can Save Money

    From electricians to homeowners, city planners to CEOs, energy monitoring is a buzzword that means more than environmental friendliness, it means big savings.

    August 30, 2016 - 0 comments
  • Explanation of Accuracy Specifications for Current Transformers

    Accuracy/Tolerance Explanations: A question is often asked about what the difference is between the tolerances specified by Magnelab and other companies. Don’t be deceived by the numbers or catch phases, know what you are getting when ordering current transformers (CT’s). When looking at the specifications for a CT, the accuracy rating or class can be […]

    August 30, 2016 - 1 comments
  • Current to Voltage vs Current to Current Transformers

    Many meter manufacturers and others ask why use a Magnelab standard, pre-burdened voltage output current transformer (CT) for monitoring power instead of the traditional 5 amp output current transformer (CT) that’s been used for decades. There are several similarities and differences between the two CT types–the similarities are that both CT’s operate under the same […]

    August 25, 2016 - 0 comments
  • Advantages & Applications of Rogowski Coils

    Feeling like your electrical efficiency is sub-par? Submetering might be exactly what you need to optimize your building – and your business.

    August 25, 2016 - 0 comments
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