รายละเอียดสินค้า : รายละเอียดสินค้า : The oxygen pump set uses the principle of ionic conduction of zirconia. When a continuous voltage is applied across the zirconia tube terminals an oxygen flow is created. The quantity of oxygen in the gas circulating inside the zirconia tube will increase, or decrease, according to how the voltage is applied. The partial pressure is measured by the MicroPoas™