Product Details

CDJ Series Seismic Geophone

Applications and Features:

1. 1~3Hz geophones applied for deep seismic prospecting, natural earthquake surveillance and prediction, pulse and microseismic measurement for bridge and highways, etc.
2. 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.
3. Small-sized, easy to install, easy to operate, large ambient temperature range, can meet the demand of multi-wave component seismic data acquisition technology

Medium–High Frequency (vertical and horizontal) Geophones
Parametertype name	CDJ-Z/P4	CDJZ/P4.5	CDJ-Z/P10	CDJ-Z/P15	CDJ—Z/P28	CDJ-Z/P30	CDJ—Z/P38
Natural Frequency (Hz)	4±10%	4.5±10%	10±5%	15±5%	28±5%	30±5%	38±5%
Sensitivity G (v/cm.s-1)	0.28±5%						0.26±5%
Coil Resistance Rc(Ω)	365±5%		365±5%	365±5%	500±5%	500±5%	650±5%
Internal Resistance (Ω)	345±5%		335±5%	310±5%	415±5%	415±5%	560±5%
Damping Coefficient Bt	0.7±10%		0.58±10%	0.58±10%	0.62±10%	0.6±10%	0.6±10%
Harmonic Distortion D	≤ 0.2
Insulating Resistance Ri (MΩ)	≥ 20
Coil’S Maximum Displacement P-P(mm)	2
Suspension Mass( g )	13.2		12.8		8.6		7.9
Working Temperature (°C)	— 40 ~ + 70
Weight ( g )	255

Medium–High Frequency (vertical and horizontal) Geophones
Parametertype name	CDJ-Z/P40	CDJ-Z/P60	CDJ—Z/P80	CDJ—Z/P100
Natural Frequency (Hz)	40±5%	60±5%	80±5%	100±5%
Sensitivity G (v/cm.s-1)	0.26 ±5%	0.3 ±5%	0.25 ±5%	0.25 ±5%
Coil Resistance Rc(Ω)	690±5%	1030 ±5%	735 ±5%	1080 ±5%
Internal Resistance (Ω)	580 ±5%	800 ±5%	685 ±5%	1020 ±5%
Damping Coefficient Bt	0.6 ±10%	0.6 ±10%	0.55 ±10%	0.5 ±10%
Harmonic Distortion D	≤ 0.2
Insulating Resistance Ri (MΩ)	≥ 20
Coil’S Maximum Displacement P-P(mm)	2
Suspension Mass( g )	7.9	5.9	5.5	5.2
Working Temperature (°C)	— 40 ~ + 70
Weight ( g )	255

Low-Frequency (vertical, horizontal and three-component ) Geophones
Parametertype 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%
ClosedCircuit Sensitivity (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%
Closed Circuit amping 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

Low-Frequency (vertical, horizontal and three-component ) Geophones
Parametertype 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

Low-Frequency (vertical, horizontal and three-component ) Geophones
Parametertype 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