JOHNE'S DISEASE. BVD (Bovine Virus Diarrhea) infection can cause numerous problems, such as damage to the digestive and immune systems, pneumonia, abortions, calf deformities, and others. Clinical signs in newborn calves infected with BVD include fever, nasal discharge, diarrhea, and inability to move about normally.
Ultrasonic Flow meter is a device used to measure the velocity of the fluid with the help of ultrasound transducers to compute volume flow of the fluid. This flow meter measures average velocity of the fluid with the use of sound waves. Working Principle of Ultrasonic Flow Meters-.
Ultrasonic Leak Detectors are so sensitive to sound that it will let you hear the blink of the human eye, but again it is not gas specific. For example, a leak test can be done in an enclosed area which is saturated with refrigerant, and the only indication an ultrasonic will give you is the sound of the leak.