In order to detect water leaks in ship’s bilge safely and reliably

a kind of intrinsic safety water signal sensor is designed.According to characteristics of application of ship

as well as working environment of sensor

type of sensor

explosion-proof form and the shape are determined.Based on physical properties and operating characteristics of sensor

sensor parameters are calculated

and its essential performance is assessed.Test verification show that design parameters are in agreement with the experimental measurements

it can meet the requirements of battery tank explosion-proof level of ship.The sensor has been widely used in various types of ships and good effect is obtained.