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The size of the active element of the hydrophone affects many properties, including sensitivity, frequency response, directional response, dynamic scope and noise-like pressure. This technical data sheet is based on iec 62127 part 3 [3] and provides detailed specifications for the 4. 0 mm needle hydrophone system。
Nh4000 needle water listener, uk pa 4mm pvdf needle water listener, is a high sensitivity device that optimizes applications below 1 mhz。
Nh4000 needles, description of uk pa 4mm pvdf needles
4. 0 mm needle hydrophones are the most sensitive products in the pa needle hydrophone series and are optimized for measurements below 1 mhz. Its larger active area enables it to measure the signal of the ten pa. However, a larger sensor area would lead to more directional response patterns, especially at higher frequencies。| Water hearing model | Nh4000 |
| Spectrum sensitive component dimensions | Diameter: 4. 0 mm Thickness: 28 μm |
| Water hearing size | 54*60mm |
| Water hearing weight | 5. 7g |
| Transmission method | Voltage conversion |
| Spectrum material | Polyfluoroethylene (pvdf) |
| 0. 1 mean sensitivity in the mhz to 10 mhz range degrees | 8v/mpa |
| Sensitivity differences between sensors | ± 3 db |
| Water hearing band | 0. 05 mhz to 10 mhz |
| Measuring uncertainty | 0. 05 mhz to 1 mhz: 9% 1 mhz to 8 mhz: 8% 9 mhz to 20 mhz: 11% |
| The water-heart system is out of control | 50 times |
| Direction in use | Point the needle directly to the sound source |
Nh4000 needles, british pa 4mm pvdf needles product sizes:
Nh4000 needles, british pa 4mm pvdf needles sensitivity and frequency response
The frequency response of all probes is a frequency function. The rationale for this response is well understood and described in the literature. Figures 2 and 3 show the sensitivity of the typical end-of-cable cable at 50 loads when the needle hydrophones are used in conjunction with their corresponding front amplifiers. The data sets shown in the figure are collected by the national physics laboratory (npl) in london。