INTE-B type is INTE Industrial Electric Co.,Ltd developed recently, technical characteristics: Work voltage: 3V-6V； DC impedance: 450Ω±50Ω/20°C； Applicable pulse width: 50ms-600ms； Applicable frequency: ≤4HZ Deferent moment: 57μNm/4.5V Work temperature -35°C-+70°C Use life pulse exceed a hundred million times (more ten years) Antimagnetic capability: Accord GB/T17215 standard request Other technical condition: Accord JB5459-91 standard request Applicable ammeter constant: 800/1600/3200imp/kwh