Low Frequency Acoustic Sensor Geophone for Seismic Detection

Low Frequency Acoustic Sensor Geophone for Seismic Detection

Type II geophone is developed by using the latest acoustic sensor technology. It is an acoustic sensor with small size, low frequency, high acoustic sensitivity, and low acceleration sensitivity. Compared with Type I geophone, it has higher acoustic sensitivity. It maintains the advantages of anti-acceleration and anti-current noise of the I-type geophone, and is widely used in seismic detection and petroleum exploration and other fields, and the maximum working depth can reach 200m.

 

 

Main Specifications:

 

Physical characteristics:

Dimensions 51×32×7.5 mm

Weight 24g

Discharge volume 22ml

Sound-transmitting material Polyurethane

 

Temperature characteristics:

Operating temperature 0℃～50℃

Storage temperature -10℃～70℃

 

Sensitivity:

Voltage sensitivity -186.5dB (ref: 1V/μPa)

Change with frequency ≤±1.5 dB

Change with depth ≤1.5 dB

Change with temperature ≤1.5 dB

Acceleration sensitivity -40～-60dB

Phase consistency ≤1.5°

Distortion <-70dB (@20Hz, 0.5mbar)

 

Electrical characteristics:

Frequency range 1Hz～1000Hz

Static capacitance 5000pF±10% (20℃, 1KHz measurement)

Insulation resistance ≥200MΩ (20