1、Mutual inductance current monitoring, high current detection accuracy, stable performance, safe isolation of input and output. 2、The measured current AC: 0-10A / 20A / 50A, 0-100A / 150A / 200A can be selected. 3、Output signal DC: 0-5V / 0-10V /4-20mA three forms are available. 4、Installation and using are easy and convenient, there is no need to connect the dc series into the circuit during measurement. 5、Through-heart structure design, isolation withstand voltage up to 2000V AC. The SZT20-CH-420E AC current transducer provides real-time isolated measurement of AC current in the grid or circuit and converts it to a 0-5V/0-10V or 4-20mA DC current output signal. It can be mated with various AD and constitute various digital centralized acquisition systems. Or output to the PLC to form an automatic control system, or to match the traditional analog and digital indicating instruments, display the measured value. Features: 1. Mutual inductance current monitoring, high current detection accuracy, stable performance, safe isolation of input and output. 2. The measured current AC: 0-10A / 20A / 50A, 0-100A / 150A / 200A can be selected. 3. Output signal DC: 0-5V / 0-10V /4-20mA three forms are available. 4. Installation and using are easy and convenient, there is no need to connect the dc series into the circuit during measurement. 5. Through-heart structure design, isolation withstand voltage up to 2000V AC. 6. Magnetic hysteresis less than 1%, can be used in strong magnetic field conditions. 7. The outer casing is made of self-extinguishing material, safe and durable. 8. It is used for AC current monitoring, detection, current overload protection, and is also used as an electronic switch for automatic control systems.  9. It is suitable for various applications requiring current and voltage conversion. 10. It has the characteristics of strong overload ability, high precision, high isolation, high security, low power consumption and strong anti-interference ability. Specification: Product Name: AC Current Transmitter Model: SZT20-CH-420E Power supply: Voltage output type, self-power supply does not require external current. Current output type requires external DC: 24V ± 10% Input feedthrough current (AC):  0-10A / 20A / 50A (SZT15 series)  0-100A / 150A / 200A (SZT20 series) Output Type (DC): Voltage output type: 0-5V/10V Current output type: 4-20mA Switch on minimum: 0.5± 0.2A (round type) 1.5± 0.2A (clamp type) Maximum current through current: 200%, the feed current cannot exceed 200% of the rated value Power consumption: ≤1W Tape: ≤1% Accuracy: ±1% Maximum leakage current: ≤ 0.1mA Linearity: 10%-100% Response time: ≤200ms Through the heart wire diameter: 0.35-20mm Working temperature: -20-60 °C Working humidity: 5-95% (no condensation) Housing material: self-extinguishing material ABS (Cycolac 94v-0) Insulation withstand voltage: 2000VAC 50/60Hz 1min Package list: 1 * AC Current Transducer Working principle: 1. Based on electromagnetic induction, inductive current will be generated when the current in the circuit changes. Transform large current into standard small current through transformer, 2. Through relevant signal processing circuit and output control circuit, the dc current signal of 0-5/10V or 4-20mA can be output and transmitted to the next level system.