Voltage Sensor Buying Guide
A sensor is a detection device. The sensor can sense the measured information, and can transform the sensed information into electrical signals or output other required information forms according to certain rules. In this way, sensors meet the requirements of information transmission, processing, storage, display, recording and control.
The characteristics of the sensor include: miniaturization, digitization, intelligence, multi-function, systematization and networking. It is the first part to realize automatic detection and automatic control. The existence and development of sensors allow objects to have senses such as touch, taste, and smell, and make objects slowly become alive.
We can classify sensors according to different criteria. Such as working principle, purpose, output signal, etc. Today we will introduce the voltage sensor. We hope that after reading this article, you can buy a voltage sensor that is suitable for you.
Voltage sensors
With the development of technology, voltage sensors have also been further developed and applied. For example, a variety of voltage sensors are widely used in equipment or systems such as inverters and rectifiers for transmission systems, uninterruptible power supplies, active filters, reactive power compensation, battery charging and discharging, semiconductor protection, and drive protection.
The function of the voltage sensor is to automatically detect the voltage, so that we can control and display the voltage of the equipment or system, and take automatic protection measures such as overvoltage and under voltage if necessary.
The voltage sensor has a DC voltage sensor and an AC voltage sensor. Let's briefly introduce these two voltage sensors.
DC voltage sensor
A DC voltage sensor is a device that isolates and converts the measured DC voltage into a standard DC voltage or DC current that is output in a linear proportion. DC voltage sensors are further divided into single-channel DC voltage sensors and dual-channel DC voltage sensors. A single-channel DC voltage sensor refers to a device that isolates and converts the measured DC voltage into a single-channel standard DC voltage or DC current. Dual-channel DC voltage sensor refers to a device that isolates and converts the measured DC voltage into dual-channel standard DC voltage or DC current output in a linear proportion. ATO has DC voltage sensor 10mv to 1000v, 50mv to 1000v DC voltage sensor for you to select.
AC voltage sensors
AC voltage sensors are further divided into single-phase AC voltage sensors and three-phase AC voltage sensors. Single-phase AC voltage sensor refers to the isolation and conversion of the measured AC voltage into a single-channel standard DC voltage or DC current output in a linear ratio. The three-phase AC voltage sensor refers to the isolation and conversion of the measured three-phase AC voltage into three-way standard DC voltage or DC current output in linear proportion.
Selection principle
If you want to buy a voltage sensor, then you must know the selection principle of voltage sensor. Next, let's introduce the selection principles of voltage sensors.
In the voltage measurement, the appropriate voltage sensor should be selected according to the specific situation. The basic principles of voltage sensor selection are:
- The magnitude range of the measured voltage is an important basis for selecting a voltage sensor, so there must be a wide enough voltage measurement range.
- It should have a wide enough frequency range and high enough measurement accuracy.
- With high enough input impedance, the input resistance of the voltage sensor is the additional load of the circuit under test. In order to reduce the influence of the access of the measurement circuit on the circuit under test, it is required to have a higher input impedance.
- It should have high anti-interference ability. The measured voltage often contains some components that do not need to be measured, such as noise interference.
