The piezoelctric transducers are mainly used as downhole seismic receivers but, with optional accessories, can also be used as a bottom array for shallow waters and marsh areas and as a sensor array placed along tunnel walls, dams and other dry or wet concrete and rock structures
| The transducer module: | |
| Piezoceramic element Resonant frequency: Dynamic response: Pre-amplifier: | >35KHz 150-190 dB, nominal differential or single-ended output. (The amplifier characteristics can be modified to meet various requirements.) |
| Casing | The casing has o-rings fittings, permitting easy service and even the replacement of a module, in case of malfunction after long-term service rough conditions. This solution prolongs significantly the operational life of the hydrophone chain as a whole. |
The TC receivers are used with applications where 3-component data are not absolutely necessary. The TC 12/48 can also be used on the sea, lake or river bottom (e.g. for river crossing surveys), in marsh, on snow and ice
| Technical Data | |
| Functional Characteristics Frequency range: Sensitivity: Omnidirectional: Output impedance: Power requirements: | 15 Hz--35 kHz (Optional 3 Hz--35 kHz, Low cut settable at manufacturing stage) 0.1 mA / m bar up to 35 kHz (the effect of the borehole not considered). less than 110 W at 1 kHz +/-12 V CC |
| Dimensions Diameter across the hydrophones: | 40 mm / Length of the hydrophone: 135 mm The standard housing of the TC hydrophones is cylindrical with cylindrical-conic endings. (Housing available optionally in a range of shapes and materials). |
| Operational Characteristics Operating depth: | 500 m with housing of Murytal C ®. 1000m with housing of stainless steel. |