Marshy Geophone Sensor String

Marshy Geophone Sensor String

Marshy Geophone Sensor
Description
CDJ Series Digital Seismic Sensor (Geophone) are available frequencies from 1Hz to 100Hz vertical and horizontal direction, and geophone-consisted three-component geophones, borehole geophone, tomographic imaging geophone series with stable performance, high fidelity and consistent quality in oil, gas exploration and other fields.
Applications and Features

• 1~3Hz geophones applied for deep seismic prospecting, natural earthquake surveillance and prediction, pulse and microseismic measurement for bridge and highways, etc.
• 4~100 Hz widely used to seismic prospecting of petroleum, coal, metallurgy, defense engineering and etc.
• High sensitivity, low-distortion, reasonable damping coefficient, good linear response, good parameter conformity, higher resolution and excellent waterproof property.
• Small-sized, easy to install, easy to operate, large ambient temperature range, can meet the demand of multi-wave component seismic data acquisition technology

  Low-Frequency (vertical, horizontal and three-component ) Geophones
  Parameter\type name			CDJ-Z1/P1/S1			CDJ-Z1A/P1A/S1A
  Natural Frequency (Hz)			1±10%
  Coil Resistance Rc(Ω)			3400±10%			3500±10%
  Open Circuit Sensitivity G (v/cm/s)			2±10%			6.7±10%
  ClosedCircuitSensitivity (v/cm/s)			1.83±10%			6.4±10%
  Internal Resistance R(Ω)			3100±10%			3300±10%
  Open Circuit Damping Coefficient Bt			0.32±10%
  ClosedCircuitamping Coefficient			0.43±10%
  Insulating Resistance Ri (MΩ)			≥ 10
  Coil’S Maximum Displacement P-P (mm)			6
  Suspension Mass ( g )			770
  Working Temperature (°C)			—25 ~ +55
  Weight (K g )			8.15	3.4	10	8.15	3.4	10

  Table 4 Low-Frequency (vertical, horizontal and three-component ) Geophones Parameter\type name CDJ—Z2A/P2A/S2A CDJ-Z2B/P2B/S2B CDJ-Z2C/P2C/S2S Natural Frequency (Hz) 2±10% Sensitivity G (v/cm.s-1) 1.2±10% 3.5±10%% 2±10% Coil Resistance Rc(Ω) 1600±5% 13000±5% 6040±5% Internal Resistance (Ω) 1540±5% 12800±5% 5800±5% Damping Coefficient Bt 0.7±10% Harmonic Distortion D ≤ 0.2 Insulating Resistance Ri (MΩ) ≥ 20 Coil’S Maximum Displacement P-P(mm) 3 Suspension Mass( g ) 60 Working Temperature (°C) —25 ~ +55 Geophone Element Weight (K g ) 0.25 Table 5 Low-Frequency (vertical, horizontal and three-component ) Geophones Parameter\type name CDJ—Z2.5A/P2.5A/S2.5A CDJ-Z2.5B/P2.5B/S2.5C CDJ-Z2.5C/P2.5C/S2.5S Natural Frequency (Hz) 2.5±10% Sensitivity G (v/cm.s-1) 1.2±10% 3.5±10% 2±10% Coil Resistance Rc(Ω) 1600±5% 13000±5% 6040±5% Internal Resistance (Ω) 1540±5% 12800±5% 5650±5% Damping Coefficient Bt 0.7±10% Harmonic Distortion D ≤ 0.2 Insulating Resistance Ri (MΩ) ≥ 20 Coil’S Maximum Displacement P-P(mm) 3 Suspension Mass( g ) 60 Working Temperature (°C) —25 ~ +55 Geophone Element Weight (K g ) 0.25 Table 6 Low-Frequency (vertical, horizontal and three-component ) Geophones Parameter\type name CDJ—Z3A/P3A/S3A CDJ-Z3B/P3B/S3B CDJ-Z3C/P3C/S3S Natural Frequency (Hz) 3±10% Sensitivity G (v/cm.s-1) 1.2±10% 3.5±10% 3±10% Coil Resistance Rc(Ω) 1600±5% 13000±5% 6040±5% Internal Resistance (Ω) 1540±5% 12800±5% 5650±5% Damping Coefficient Bt 0.7±10% Harmonic Distortion D ≤ 0.2 Insulating Resistance Ri (MΩ) ≥ 20 Coil’S Maximum Displacement P-P(mm) 3 Suspension Mass( g ) 60 Working Temperature (°C) —25 ~ +55 Geophone Element Weight (K g ) 0.25