Sensors, Transducers | ZNHSON Electronics

Current Sensors

Current Sensors Precision Measurement for Electrical Systems

Definition:
Current Sensors are specialized devices within the Sensors & Transducers category designed to detect and measure electric current flow in circuits, converting it into a standardized output signal (e.g., voltage, analog/digital data) for monitoring, control, or protection purposes. They ensure accurate, isolated current measurement without disrupting the circuit.

Types of Current Sensors:
1. Hall-Effect Sensors: Use magnetic fields to measure AC/DC currents, offering galvanic isolation and low power loss.
2. Current Transformers (CTs): Ideal for AC applications, these inductive sensors provide high accuracy and are commonly used in energy metering.
3. Rogowski Coils: Flexible, air-core coils for measuring high-frequency AC currents, suited for transient analysis.
4. Shunt Resistors: Low-cost, direct measurement via voltage drop across a resistor, best for DC/low-current applications.
5. Closed-Loop & Open-Loop Sensors: Balance precision (closed-loop) vs. cost-efficiency (open-loop) for industrial or automotive uses.

Purchasing Guidance:
- Application Needs: Match sensor type to current range (mA to kA), frequency (DC/AC), and isolation requirements.
- Output Signal: Select analog (0-5V, 4-20mA) or digital (I2C, SPI) outputs based on system compatibility.
- Environmental Factors: Consider temperature, humidity, and EMI conditions opt for ruggedized designs for harsh environments.
- Certifications: Ensure compliance with industry standards (UL, CE, RoHS) for safety and interoperability.

Current Sensors are critical for energy efficiency, circuit protection, and smart automation. Investing in the right type enhances system reliability and data accuracy. Explore our curated selection to find the optimal solution for your project.

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