Contact Sensor 1.Contact form : normal open , normal close or changeover 2.MOQ: 50 SETS 3.Delivery : about 5 days Contact Sensor\Features:Being hermetically sealed ,it can be used in all types of environments including air,water ,vacuum.oil ,fuels,and dust laden atmospheres.No power required or current drain in tis quiescent state ,great solution for the dramatic increase in battery powered ...