Split-Core Current Sensor | Non-Invasive AC Clamp | 100A SCT-013-000

The SCT-013-000 is an AC current sensor that measures electricity use without cutting any wires. It's a split core current transformer, so it clamps around a single power cable. This makes it a popular current measurement sensor for DIY energy monitoring and data logging projects. Features and Benefits - Split-core clamp design - It opens to clip around a live wire, so you don't need to disconnect power for installation. - 3.5mm jack with voltage output - This version puts out a voltage signal, making the circuit for an Arduino or Raspberry Pi current sensor simpler. - Available in 30A, 50A, and 100A models - Pick the rating that best fits your circuit's load for the best resolution. - Compact and fully enclosed housing - It keeps the internal parts safe and separate from the electrical conductor. Applications - Building a home energy monitor to track appliance or whole-house power consumption. - Monitoring the current draw of AC motors to find load changes or possible issues. - Making data logging systems to measure and record power usage in a workshop or office. Common Sensing Methods A current sensor is a device that detects electrical current and converts it into a measurable output signal. Understanding what a current sensor is involves recognising the different ways they operate. There are two primary methods for detecting current: direct sensing, which involves placing the sensor in series with the circuit, and indirect sensing, which measures the magnetic field generated by the current without direct electrical contact. Each method has distinct advantages and applications, depending on the specific requirements for isolation, current range, and accuracy. Direct (Resistive) Sensing Direct current sensing typically involves placing a resistive element, such as a shunt resistor, directly into the electrical path. As current flows through the resistor, a voltage drop is created across it, which is then measured. This method offers high accuracy, particularly for DC currents, but requires the sensor to be part of the circuit, potentially introducing a small power loss and requiring electrical isolation. It is generally used for lower current applications where breaking the circuit for installation is acceptable. Indirect (Magnetic / Non-Contact) Sensing Indirect sensing, as exemplified by a non-invasive AC current sensor like the Split-Core Current Sensor, measures the magnetic field produced by the current. This method does not require direct electrical contact with the conductor, offering electrical isolation and ease of installation. The SCT-013-000, being a split-core type, allows for clamping around an existing conductor without breaking the circuit. This makes it ideal for measuring AC currents up to 100A, providing a safe and convenient way to monitor current without disruption. Key Applications Current transformers, such as this specific sensor, are widely used for monitoring and measuring AC current in various electrical systems. The non-invasive nature and current range of 30A, 50A, and 100A make it suitable for applications where direct connection is impractical or undesirable. Common uses include energy monitoring in buildings, load sensing for industrial machinery, and fault detection in electrical panels. Its split-core design simplifies installation, allowing for quick deployment in existing setups for accurate current measurement.