High Sensitivity Geophone 4.5Hz,Vertical / Horizontal
High Sensitivity Geophone 4.5Hz (EG-4.5-HS) is used to receive the weak deep and low frequency signal. This kind of geophone has following characters: Low frequency, Low distortion and high sensitivity. It’s suitable for field single point data acquisition.
| Type | EG-4.5-HS | 
| Nature Frequency Hz | 4.5Hz ±17% | 
| Distortion | ≤0.2%(@12Hz&0.7 in/s peak-peak coil-to-case velocity) | 
| Opening Circuit Damping | 0.3±20% | 
| Damping with 20KΩ shunt resistor | 0.596±20% | 
| Coil resistance | 2000 Ω±5% | 
| Resistance with 20KΩ shunt resistor | 1818 Ω±5% | 
| Sensitivity | 90V/m/s±10% | 
| Sensitivity @59.6% damping | 81.8V/m/s±10% | 
| Moving Mass g | 22g | 
| Coil travel (mm) | 3mm | 
| Diameter | 31.8mm | 
| Height | 33mm | 
| Weight | 110g | 
| Operating Temperature Range | -40℃~+80℃ | 
| Limited Warranty Period | 1 year | 
All parameters specified here in are rated at a temperature 20℃±2℃ .
