The prototype of the tilt recorder is made by 3D printer technology. The results are divided into three parts. First, tilt recorder function. Initial the tilt recorder will be made to Full-hydrophobic design, but the structure has many blind spots. For example: The magnetic fluid will occur partial pass-through phenomenon, and acceleration threshold is different when partial pass-through be occurrence, and in the resonance frequency difference is small(50 kHz), hard to determine. Then improve Full-hydrophobic design into Half-hydrophobic design. Half-hydrophobic design would not occur partial pass-through phenomena, and the droplet size of 110 μL of tilt recorder reuse that acceleration threshold remained at 0.9G following, high reliability, good reproducibility. Acceleration threshold: 0.739 g - 0.849 g. Second, reversible function. Magnetic sensing fluid is bad to cohesion, and the contact surface of the hydrophobic poor. Need to be diluted by the water that near to nature of water and take into account magnetic to reply. Dilution ratio(MF: H2O): 1 : 10 (9.09%). In addition, wireless and passive measure. Tilt recorder that the resonant frequency reuse for performance is no increment or attenuation phenomenon, high reliability, good reproducibility. The resonance frequency before tilt for estimated(for 110 μL): 151.964 kHz, due to signal strength is poor and is overshadowed by the noise, therefore, it is a estimate value; The resonance frequency after tilt for real(for 110 μL): 10.05 MHz - 10.10 MHz.