Borehole Seismometer CME-4211BH15

The CME-4211-BH15 is a 3-component inexpensive broad-band seismometer designed for use in pits or post-holes down to 15 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 device is very rugged, does not require any adjustment or mass-centering.

Brochure

Characteristics:

Frequency range	0.033 Hz (30 sec) - 50 Hz, 0.0167 Hz(60sec) - 100 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 250mm (diameter x height including lifting ring)
Weight	2.5 kg
Case material	Plastic, waterproof, depth down to 15 m
Max. underwater depth	15м
Cold-start time	10 - 30 min
Maximum output swing	±15 V, differential output