Horizontal geophone PS-28B

verticalindustrialhigh-sensitivity

Product overview
28Hz series geophones provide precise parameters, stable damping and low distortion for seismic exploration in wide-temperature environments and for large displacement recordings. Two model modes (PS-28B and PS-28X) address different sensitivity and damping requirements.

Product category
High Frequency (>14Hz)

Technical parameters (comparison)

• Natural Frequency (Hz): PS-28B (20℃): 28±5% | PS-28X (20℃): 28±5%
• Coil Resistance (Ω): PS-28B: 390±5% | PS-28X: 395±5%
• Sensitivity (V/m/s): PS-28B: 30.0±5% | PS-28X: 39.0±5%
• Sensitivity With Shunt Resistor (V/mn/s): PS-28B: 28.5±5% (7500Ω) | PS-28X: 28.0±5% (1000Ω)
• Damping: PS-28B: 0.60±5% | PS-28X: 0.27±5%
• Damping With Shunt Resistor: PS-28B: 0.632±5% (7500Ω) | PS-28X: 0.552±5% (1000Ω)
• Distortion (%): ≤0.2 (both models)
• Spurious Frequency: PS-28B: ≥300 | PS-28X: 1.5
• Max. Motion (mm): PS-28B: 1 | PS-28X: 11
• Moving Mass (g): PS-28B: 10.1 | PS-28X: ≥350
• Dimensions (d×h) mm: PS-28B: 25.4×32 | PS-28X: 27×34
• Temperature Range (℃): -40 to +70 (both models)
• Warranty Period (Year): PS-28B: 1 | PS-28X: 3
• Weight (g): PS-28B: 77 | PS-28X: 100.7

Notes

• Damage resulting from high voltage or physical damage is excluded from the warranty coverage.
• Product specifications may be updated without prior notice.

Technical characteristics / specifications

• Series: 28Hz geophones
• Two parameter modes: PS-28B (20℃) and PS-28X (20℃)
• Natural frequency: ~28 Hz (±5%)
• Coil resistance: ~390–395 Ω (±5%) depending on model
• Sensitivity: 30.0 V/m/s (PS-28B) or 39.0 V/m/s (PS-28X) ±5%
• Shunt resistor sensitivity and damping variants provided (examples: 7500Ω, 1000Ω)
• Low distortion: ≤0.2%
• Wide operating temperature: -40 to +70 ℃
• Designed for wide temperature environments and large-displacement seismic exploration
• Dimensional and weight differences by model (compact form factors listed above)