Product Category


LD1 Type Current Sensor


LD1 series DC leakage current sensor is a series of new device developed according to principle of electromagnetic induction. Its low current is stable. It is highly insulating between its primary coil and secondary coil. This sensor is used to measure current of signal system, circuit, and leakage monitoring system, as well as to measure current difference.

Directions for use:

  • When the current will be measured goes through a sensor, the current will be measured at the output end. (Note: The false wiring may result in the damage of the sensor)
  • Custom design in the different rated input current and the output current are available.


  • Variable speed drives
  • Welding machine
  • Battery supplied applications
  • Uninterruptible Power Supplies (UPS).
  • Electrochemical
Type LD1-10mA LD1-20mA LD1-30mA LD1-50mA LD1-100mA Unit
Rated current(Ipn) ±10 ±20 ±30 ±50 ±100 mA
Measure range(Ip) ±12 ±24 ±36 ±60 ±120 mA
Rated output @Ip=±Ipn                ±5±1% V
Supply voltage ±12,±15 V
Power Consumption  <25 mA
Offset voltage @Ip=0      ±50 mV
Offset drift @ -40~+85℃     ≤±1.5 mV/℃
Output drift @ -40~+85℃    ≤±1 mV/℃
Linearity @Ip=0-±Ipn      ≤1 %FS
Response time @50A/μS, 10%-90%     ≤50 μs
Galvanic isolation @ 50HZ,AC,1min     2.5 KV
Mechanical dimension(for reference only) Note
LD1 Type Current Sensor-heyi 1. All dimensions are in mm.

2. General tolerance ±1mm.

3. Elucidation: 1:+15V 2:–15V 3:V0UT 4:NC

General date Value Unit
Operating temperature(TA) -40 to +85
Storage temperature(TS) -40 to +125
Mass(approx) (M) 65 g
Characteristic of Output Noise Voltage Input Current-Output Voltage
LD1 Type Current Sensor-heyi Noise Voltage

( Output signal )

LD1 Type Current Sensor-heyi

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