ดิจิตอล geophone เซ็นเซอร์แผ่นดินไหว

Application: petroleum exploration Specifications: Parameter/Mode GD-20Dx-8 GD-20Dx-10 GD-20Dx-14 GD-20Dx-28 GD-20Dx-40 Natural frequency(Hz) 8±5% 10±5% 14±5% 28±5% 40±5% Damping 0.38±5% 0.3±5% 0.22±5% 0.27±5% 0.37±5% Damping with shunt resistor 0.7±5% 0.75±5% 0.51±5% 0.552±5% 0.576±5% Sensitivity(V/m/s) 28±5% 28±5% 28±5% 39±5% 42±5% Sensitivity with shunt resistor(V/m/s) 20±5% 20.1±5% 20.1±5% 28±5% 30.4±5% Coil resistance (Ω) 395±5% 395±5% 395±5% 395±5% 575±3.5% Closed