To facilitate requirements of continuous towing measurement in deep ocean regions

the fiber Bragg grating（ FBG） pressure sensor utilizes an FBG temperature compensation sensor to solve cross-sensitivity problem.Due to the inconsistencies between the response time of seawater and seawater temperature

there is a bias in testing seawater pressure in mesoscale vortexes and frontal surface with sudden changes in temperature. A new type of dual fiber grating pressure sensor is designed. By encapsulating the fiber Bragg grating in the center and at the edge of the sensor

the edge grating does not lie on the elastic membrane and only affected by temperature

which makes its temperature response characteristics near uniform. Test result show that sensor temperature compensation and pressure FBG temperature response time is 1. 45 s and 1. 52 s

response uniformity is good. Sea tests on the FBG pressure sensor and reference pressure sensor ALEC—TD

correlation coefficient reach up to 0. 990 6

basicly eliminate measurement error caused by inconsistent temperature

achieve purpose of accurate pressure measurements.