Beijing Hydrosurvey Sci. & Tech. Co., Ltd.
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Hydrosurvey - Needle Hydrophones
Needle hydrophone are good general-purpose measuring devices. They are available in a wide range of diameters from 4.0 mm down to 0.04 mm. The frequency response of a needle hydrophone is dependent on the size of the active element of the hydrophone and the chart below provides an indication of the frequency range of these devices.
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All needle hydrophones need to be used with a preamplifier and a DC coupler (shown below). These are an integral part of the hydrophone system whose primary function is to provide electrical impedance buffering.
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- 400mm hydrophone
- 200mm hydrophone
- 1.00mm hydrophone
- 0.50mm hydrophone
- 0.20mm hydrophone
- 0.075mm hydrophone
- 0040mm hydrophone