The enameled wire winding and a cylindrical soft iron core are built into this unit. The iron core displacement inside the winding can manually adjusted by the knob to give precise measurements up to 1.3 H. Connections are made through 4mm sockets.
- Resistivity: 0.0165 W/m.
- Self-induction coefficient: 0.15 to 1.3 H.
- Voltage: 30V A/C or 60V D/C.