Racotech manufactures advanced precision seismic geophones for high definition land, transitional zone and marsh zone applications, with the frequency covering from 4.5Hz, 8Hz, 10Hz, 14Hz, 28Hz, 40Hz, 60Hz to 100Hz.

 

RGI-HP103 (SM24) Geophone Element

SPECIFICATION| Specified at 20?C 

Frequency 

Natural Frequency 10 Hz±2.5%

Max. tilt angle for specified fn 10?

Typical spurious frequency >240 Hz

Distortion 

Distortion coil to case velocity with 0.7 in/s p.p. coil <0.10%

Distortion measurement frequency 12 Hz

Max. tilt angle for distortion specification 10?

Damping 

Typical open-circuit damping 0.25

Damping calibration shunt 1339Ω  0.60

Damping calibration shunt 1000Ω  0.69

Tolerance with calibration-shunt 0 to 5%

Coil Resistance 

Standard 375Ω±2.5%

Sensitivity 

Sensitivity 28.8 V/m/s±2%

Sensitivity with 1339Ω shunt resistor 22.5 V/m/s±2.5%

Sensitivity with 1000Ω shunt resistor 20.95 V/m/s±2.5%

Physical Characteristics 

Moving mass 11g

Maximum coil excursion p.p. 2mm

Diameter 25.4mm

Height 32.0mm

Weight 85g

Operating temperature range -40?C to +100?C

 

RGI-HP102 (32CT) Geophone Element

SPECIFICATION| Specified at 25?C 

Frequency 

Natural Frequency 10 Hz±2.5%

Max. tilt angle for specified fn 20?

Typical spurious frequency ≥250 Hz

Distortion 

Distortion coil to case velocity with 0.7 in/s p.p. coil <0.10%

Distortion measurement frequency 12 Hz

Tilt angle for distortion specification 10?

Damping 

Typical open circuit damping 0.316±2.5%

Damping calibration shunt resistance 1000Ω

Damping with calibration shunt 0.70±2.5%

Coil Resistance 

Standard 395Ω±2.5%

Sensitivity 

Sensitivity 27.5 V/m/s±2.5%

Sensitivity with 1000Ω shunt resistor 19.7 V/m/s±2.5%

Physical Characteristics 

Moving mass 11.2g

Maximum coil excursion p.p. 1.52mm

Diameter 25.4mm

Height 33.0mm

Weight 89g

Operating temperature range -40?C to +100?C