The size of the water hearing element affects many properties, including sensitivity, frequency response, directional response, dynamic range and noise equivalent pressure. This technical data sheet was prepared in accordance with the requirements of iec 62127 - part 3 [3] and provided a detailed description
Regulation of the 0. 2 mm needle hydrophone system。
0. 2 mm needle hydrophone is a popular generic measurement device that provides good measurement effects
The trade-off between sensitivity and orientation applies to a wide range of frequency applications ranging from 1. 0 to 40 mhz。
The 0. 2 mm needle hydrophone is a universal hydrophone that provides a good trade-off between sensitivity, frequency response, directional response, dynamic range and noise equivalent pressure and is applied to measurements ranging from 1 mhz to 40 mhz. Large active area allows measuring signal ≈1 kpa. However, the larger sensor area leads to a more directional response pattern, especially at higher frequencies。
British pa nh0200 needle hydrophone technical parameters, 0. 2 mm needle hydrophone:
| Output resists: | 13pf +/- 2pf |
| Typical detection sensitivity: | The average of 55nv / pa (equivalent to 265. 2 db re 1v / upa) in the 2-12 mhz range was measured at the output end of the correctly connected hp1 pre-diving amplifier |
| Sensitivity differential: | Sensitivity changes between probes approximately +/- 3db |
| Typical frequency response: | Flat (+/-2db): 5 to 25 mhz Flat (+/- 4db): 1 to 35 mhz Minimum calibration frequency of 100 khz |
| Sensor material: | 9 μm thick gold electrode polyethylene (pvdf) film |
| Sensor size: | 0. 2mm diameter |