The use of stainless steel , the welded cover of the dms measuring elements and the used of a glass leadthrough for the cable connection allow the equipment to be used without problems , even under unfavourable environmental conditions 该元件由不锈钢制作, dms测量元件有焊接表层且连接电缆使用了玻璃套管。这些使设备即使在恶劣环境下也能无故障工作。