The series of gas acoustic parameter testers can conduct high-precision measurements of the sound speed in gases within a wide frequency band through frequency-sweeping or pulse operation modes, and analyze the propagation of sound waves in gaseous media.
| Models | Modes | Sweeping Bandwidth | Precision of sound velocity | Manuals |
| Fluid Insight 10A | Resonance mode | 100kHz~600kHz | Better than 1‰ | |
| Fluid Insight 10B | Pulse mode | 100kHz~600kHz | Better than 1‰ | |
| Fluid Insight 10C | Resonance+Pulse | 100kHz~600kHz | 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.