RIB Current Sensors Product Size
When it comes to installing any of our RIB® products, the end user certainly takes size into consideration. In most cases, the smaller the product, the easier it is to install. As you can see below, our split core current sensors are smaller than your standard business card. In fact, it will completely hide behind one! About as deep as a couple packs of your favorite chewing gum, these split core current sensors are sure to fit in a junction box with room to spare.
Split Core Opening
We wanted to make the method of opening the split core as easy and space-saving as possible. That led our Engineering Team to develop a slide opening, as compared to a hinged opening, to insert a wire to be monitored. This split core opening is just one of many features.

With such a small current sensor and an intuitive way of opening the split core, how could this product get any better? We found the way!
Ratcheting Wire Clamp
Another great feature of the RIB® current sensors is the integrated ratcheting wire clamp on the housing. Let's suppose the current sensor is being used in a spacious enclosure on a short length of hanging wire. To keep the current sensor from sliding around on that wire, a wire clamp may be tightened against the wire. Now the current sensor can be installed on a vertical run of wire and not slide down! The opening of the split core current sensor can monitor a wire that is up to half an inch in diameter, which can take you into the 0-gauge wire size, depending on the wire insulation thickness.

Current Sensors Built for Building Automation Systems
In the world of building automation, reliable monitoring and control start with accurate sensing, and that’s exactly where our RIB® current sensors excel. Their compact size, intuitive slide opening, and ratcheting wire clamp design make them practical for tight panels while providing the precise feedback needed for effective building automation systems. Whether you’re monitoring fan status, verifying pump operation, or integrating energy tracking into your facility’s control strategy, these sensors simplify installation while delivering dependable performance you can trust.
Using well-designed current sensors within your building automation solutions enables smarter control and monitoring without adding unnecessary complexity to your projects. When paired with control relays or integrated directly into your monitoring system, these sensors help facility teams automate response to equipment operation, improve energy efficiency, and support preventative maintenance programs. It’s one more way Functional Devices helps make building automation more effective, giving you the tools you need to build systems that are efficient, reliable, and easy to maintain.
The next time you're hunting for a dependable current sensor to install in your project, consider the RIB® split core current sensors. They are sure to meet the requirements and are engineered with the end user in mind! If you have any questions, feel free to give us a call or shoot over an email. We are always happy to help.
About Functional Devices, Inc.

Functional Devices, Inc., located in the United States of America, has been designing and manufacturing quality electronic devices since 1969. Our mission is to enhance lives in buildings and beyond. We do so by designing and manufacturing reliable, high-quality products for the building automation industry. Our suite of product offerings include RIB relays, current sensors, power controls, power supplies, transformers, lighting controls, and more.
We test 100% of our products, which leads to less than 1 out of every 16,000 products experiencing a failure in the field.
Simply put, we provide users of our various products confidence and peace of mind in every box.