Types of Current Sensors

Current sensors passively measure the amount of electricity passing through a system without impacting a circuit's flow, it is applied for both AC and DC current,. Affixed to a conductor when they are in need of monitoring, a current sensor utilizes a magnetic field that is present when current is actively running through a wire. As such, current sensors often calculate the amount of electricity passing through a wire while simultaneously generating a proportional output which can be observed. Necessary for keeping track of energy usage for separate sub-meters, energy regulation, part reliability in case of an emergency, and more, current sensors are an essential device for monitoring electricity in various systems.   

As current passing through a conductor produces its own magnetic field, current sensors use this byproduct to measure current. Depending on whether a current should step-up, step-down, or go unchanged, all electrical devices come with specific current requirements that are recommended to be adhered to. Ultimately preventing the overload of current in an electrical system if used properly, it is important to apply current sensors to monitor and mitigate the chances of a short circuit.

Coming in a range of types to suit various networks, current sensors are available as hall effect current sensors, Rogowski coils, split-core, solid-core, open-loop, and closed-loop sensor types. When in search of a part compatible for AC and DC current, all effect current sensors, commonly known as DC current sensors, are a recommended option. Due to operating off of the Hall Effect, a conductor's tendency to create a magnetic field when current is present, effect current sensors are a common commodity amongst electrical systems. Unlike the aforementioned sensor, Rogowski coil sensors are great for practical applications, live wires, or where installation is difficult to navigate. Equipped with a thin and flexible coil for easy application when wrapping around a conductor, Rogowski coils are snapped closed to achieve a secure fit; this feature can also be seen when applying split core sensors.

When part accuracy is a concern, solid core, open-loop, and closed-loop current sensors should be your primary choice. Often providing rapid response times with the benefit of high linearity, accuracy, and the potential for reduced temperature fluctuations when exposed to an increase in current, these sensor types are beneficial when precision in measurements is required.

Though current sensors are similar in function to current transformers and current transducers, each component has their own set of unique characteristics. While each part is capable of being interchanged for the same function, there are technical differences that set them apart, making them better suited for particular tasks of their own.  

If acquiring a current sensor is on your agenda, we at ASAP Inventory can help you mark this task off of your to-do list. Ensuring you receive the parts you need with full transparency and without delay, we provide rapid lead times for all our customers, supplying you with parts you need ASAP. As your trusted supplier of various current sensors, sensors in aircraft, and parts relative to their construction, we invite you to browse our inventory for options best suited for your intended application. Due to our quality control and export compliance, we operate with AS9120B, ISO 9001:2015, and FAA AC 00-56B certification and accreditation. If you would like to request a quote for your comparisons, you can submit an RFQ form as provided on our website. Upon receipt, a dedicated account manager will quickly review and respond with a personalized solution to your needs in just 15 minutes or less, 24/7x365.


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