To measure the Ultrasonic Velocity in Liquids.

The principle used in the measurement of velocity (ν) is based on the accurate determination of the wavelength (λ) in the medium. Ultrasonic waves of known frequency (f) are produced by a quartz crystal fixed at the bottom of the cell. These waves are reflected by a movable metallic plate kept parallel to the quartz crystal. If the separation between these two plates is exactly a whole multiple of the sound wavelength, standing waves are formed in the medium. This acoustic resonance gives rise to an electrical reaction on the generator driving the quartz crystal and the anode current of the generator becomes a maximum. 

Parts:

A) High Frequency Generator: Single and Multi-frequency

B) Measuring Cell : Max. displacement of the reflector : 20 mm Required Quantity of liquid : 10 c.c. Least Count of micrometer: 0.01mm/ 0.001mm.          Impedance : 50 O: 

C) Shielded Cable : Impedance : 50 O

(I) Model ULT - 80. (Single Frequency)

Frequency Range : 2 MHz

Accuracy : + 0.3 %