Clamp On/Portable Transit Time Ultrasonic Flow Meter is used to detect acoustic signal and hence can be used on clean liquid applications like clean water, chemicals, potable water, DM water and petroleum. Chandak Instruments Pvt. Ltd offers Clamp On/Portable Transit Time Ultrasonic Flow Meter. Chandak Instruments Pvt. Ltd also manufactures various types of flow meters. The Clamp On/Portable Transit Time Ultrasonic Flow Meter has an upstream transducer [T1] which sends a signal to a downstream transducer [T2] that in turn sends back a signal. The time difference created by which the liquid`s flowing velocity ultimately helps in determining the flow rate.