wera werk electrical components Germany wera werk models wera werk prices

wera werk electrical components utilize the good conductivity and fluidity of mercury to control the opening and closing of electrical circuits. They consist of a glass tube, mercury, fixed electrodes, lead wires, etc. After evacuating the air from the tube, it is filled with various gases and sealed. They are suitable for environments with dust, oil, water vapor, and corrosive gases, and can also be used as explosion-proof switches in locations with explosive gases. Due to the high surface tension and specific gravity of the mercury inside the tube, along with its fluidity, the position of the mercury changes immediately upon slight tilting of the glass tube.