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The CME4211-BH150 model, a 3-component broadband low-noise seismometer, is designed for permanent or long term installation in boreholes down to 250 meters depth both dry and flooded. The sensor is equipped with a hermetic connector and a lifting ring for going in hole and subsequent surfacing. The instrument is very rugged and does not require any adjustment or mass-centering.| Frequency range | 0.033 Hz (30 sec) - 50 Hz |
| Sensitivity | 2000 V / (m/sec) |
| Self noise at 1 Hz | 8.9 nm/sec (17.8 µV) |
| 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 м |
| Cold-start time | 10 - 30 min |
| Maximum output swing | ±10 V, differential output |