The series of liquid acoustic parameter testers are used to characterize the acoustic properties of liquids. They can achieve high-precision measurements of the sound speed in liquids and the ultrasonic attenuation coefficient of liquids in a wide frequency band. The instruments are suitable for both scientific research and industrial fields, and are used to analyze the acoustic propagation and absorption properties of liquids.
| Models | Modes | Sweeping Bandwidth | Precision of sound velocity | Manuals |
| Fluid Insight 20A | Resonance mode | 1MHz~100MHz | Better than 1‰ | |
| Fluid Insight 20B | Pulse mode | 1MHz~100MHz | Better than 1‰ | |
| Fluid Insight 20C | Resonance+Pulse | 1MHz~100MHz | Better than 1‰ |
1. B.A. Younglove, N.V. Frederick, Speed-of-sound measurements in liquid and gaseous air, International Journal of Thermophysics，13: 1033–1041, 1992.
2. T. Motegi, K. Mizutani and N. Wakatsuki, Simultaneous Measurement of Air Temperature and Humidity Based on Sound Velocity and Attenuation Using Ultrasonic Probe，Japanese Journal of Applied Physics，52：07HC05，2013.