Downhole hydrophone array with up to 24 channels for cased/uncased, water-filled, narrow-diameter boreholes up to 400m. For downhole and crosshole data collection.

Hydrophone string for P-waves in water-filled boreholes up to 500m deep (24 hydrophones with 1m intervals - different configurations available).

Digital hydrophone string for recording P-waves in boreholes up to 1000m for tomographic surveys. Deployed using a logging winch with four-conductor cable.

Digital triaxial geophone string (up to 10 stations) to receive P- and S-waves in dry or water-filled boreholes up to 100m. Designed for S-wave borehole tomography.

Analog triaxial geophone string (up to 8 stations) to receive S-waves in dry or water-filled boreholes up to 100m. For borehole tomography or downhole surveying.