出售4.5Hz地震检波器(LGT-20D)

**: LGT
LGT-20D4.5检波器技术参数（20℃）

SPECIFICATIONS OF LGT-20D4.5 GEOPHONE ELEMENT

检波器型号

Geophone Type

LGT-20D4.5

自然频率 Fn

Natural Frequency (Hz)

4.5 ± 0.5

开路阻尼系数 Bo 

Open Circuit Damping

0.70 ± 10%

灵敏度 G 

Intrinsic Voltage Sensitivity 
(V/m/s)

23.4 ± 7.5%

线圈电阻 Rc 

Coil Resistance (kΩ)

395 ± 5%

谐波失真 D 

Harmonic Distortion (%)

≤ 0.3

典型假频（Hz）
Typical spurious frequency

≥160

线圈较大位移 
Case to Coil Motion P-P (mm) 

1.5

悬体质量M 

Moving Mass (g)

11 ±5％

较大倾角
Maintains Fn specifications to tilt angle

10°

芯体直径  

Unit Diameter (mm)

25.4

芯体高度 

Unit Height (mm)

33

芯体质量 

Unit Mass (g)

87

工作温度 

Operating Temperature (℃)

-40 — +90

质保期

Warranty（year）

1