Muller-platte needle, muller-platte hydrophone is a voltage hydrophone used for high frequency ultrasound and shock wave measurements in liquids
The muller-platte needle, the muller-platte hydrophone model application:
Müller-platte needles were developed by the university of achen in 1985 to measure low-energy water shock waves for the development of kidney rock crushers and focal ultrasounds。The muller-platte needle, the muller-platte hydrophone, is based on pvdf's special micrometer designed to be used for high-energy ultrasound measurements and to record explosions in water up to kbar. Its hemispheric head, its small sensitive diameter (less than 0. 5 mm) and very short rise time (about 50 ns) are ideal equipment for distribution measurements in the focus areas of ultrasound energy exchangers or renal stone crushers. Other applications include measuring the impact waves generated by lasers, the vapour effect or applications in medical and military research。
To date, this water hearing is also the gold standard for measuring water shock wave pressure. Over the past few years, the müller-platte pressure table has proved its reliability and durability in many experiments around the world, especially under very short shock pressure。
To record the signal, we suggest direct connection to the 1 mohm input to the recorder. For very small pressures and cables longer than 3 m, we provide a special high-bandwidth charge amplifier, mcpa 10, with cables of up to 150 m length。
Muller-platte needles, muller-platte hydrophone technical parameters:
| Pressure range: | -100 to 1500 bar (-10 to 150 mpa) |
| Sensitive elements: | Voltage pvdf |
| Rise time: | 50 nanoseconds |
| Sensitive diameter: | < 0. 5 mm |
| Sensitivity: | About 0. 3 pc/ bar or 1 mv/ bar incl。2 m cable |
| Bandwidth: | 0. 3 – 11 mhz±3. 0 db |
| Temperature range: | Highest60 degrees celsius degrees |
| Calibration: | The shock wave can be calibrated to 20 bar in water。(can verify constant sensitivity under pressure up to 320 bar)Based on the impact wave calibration |
| Pipeways: | Point-end 1. 2 mm, 4. 0 mm at installation, stainless steel |
| Cable: | 2 m coaxial cableIf you need a longer connection, use our charge amplifier mcpa 10 |
| Connection: | Bnc position |
| Records: | To 1 mohm input |