High Precision North Seeking Gyroscopic Inclinometer. Max Working Temp:175 ? (350 ?), Max Working Press:20,000psi Signal Type: 3-Dim Acceleration of gravity,3-Dim Angular velocity of earth rotation, Sensor Type: Fiber-Optic Gyro, Measure range:0~360°, Accuracy:±0.1°, diameter:2.83""(72mm)