Seismometer CME-4211-BH150
The CME4211-BH150 model is a 3-component broadband low-noise seismometer.
It is designed for permanent or long-term installations in dry or flooded boreholes at depths of up to 250 meters.
The seismometer has a hermetic connector and a lifting ring for installation into boreholes and subsequent surfacing.
The instrument is rugged and does not require any adjustment or mass-centering.
Characteristics Delivery and warranty
| Frequency range | 0.033 Hz (30 sec) - 50 Hz |
| Sensitivity | 2000 V / (m/sec) |
| Clip level | 5 mm/sec |
| Self noise at 1 Hz | 8.9 nm/sec (17.8 µV) |
| Dynamic range | 112 dB |
| Nonlinearity | 0.5 % |
| Sensitivity axes | Vertical, North, East |
| Supply voltage | 12 V Nominal (10.5-16 V permissible) |
| Power consumption | 25 mA |
| Temperature range | -12°C - +55°C - standard range -40°C - +55°C - extended range |
| Maximum installation tilt | ±15° |
| Dimensions | 105 x 303 mm (diameter x height including lifting ring) |
| Weight | 4.3 kg |
| Case material | Stainless steel, waterproof, depth down to 15 m |
| Max. underwater depth | 250 m |
| Output impedance | 1000 Ohm |
| Cross-axes sensitivity | -60 dB |
| Cold-start time | 10 - 30 min |
| Leveling, mass locking | none required |
| Case connectors | Russian RS-10 type 10-pin connector with additional hermetic sealing |
| Delivery set | Lifting ring, 3 feet, pin |
| Maximum output swing | ±10 V, differential output |