Common Categories of True RMS Voltage Transducers

A detailed understanding of the categories of true RMS voltage transducers will help users quickly and accurately find the most suitable one when purchasing.

The following is a classification based on the output signal type, measurement range, power supply type, and isolation method.

Output Signal Type

Analog Output: Outputs a proportional voltage signal value, such as 0-5 V, 0-10 V, or 4-20 mA. This type of true RMS voltage transducer is often used in industrial control and monitoring systems.

Digital Output: Provides output via a protocol (such as RS485/Modbus, CAN, or Profibus). Suitable for integration with digital monitoring systems or smart grids.

CR4510 single phase true rms ac voltage transducer


By Measurement Range

Low-voltage RMS transducers typically measure voltages in the range of, for example, 0-300 V. They are primarily used in instrumentation, electronic equipment, and laboratories.

Medium-voltage RMS transducers

For example, they measure voltages up to 1 kV and are primarily used in industrial and building power monitoring.

High-voltage RMS voltage transducers 

These transducers utilize a voltage divider or voltage transformer. They are primarily used in power transmission and distribution applications.

Based on Power Supply Type

Self-Powered/Loop-Powered: These voltage sensors derive power directly from the conductor being measured. They are ideal for long-term remote monitoring systems.

Externally Powered

These transducers require an external power supply to operate and offer higher detection accuracy and stable signal output. They are primarily used in applications requiring high accuracy.

Isolation Method

These transducers primarily utilize electrical isolation, magnetic coupling, or optical isolation. They prevent electromagnetic interference and ensure operator safety.

Non-Isolated RMS Sensors

These sensors offer a simpler design and lower cost, but are less safe for high-voltage applications.

For high-quality, low-cost true RMS voltage transducers, please visit OFweek Mall.

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