Parshall liners
Parshall trainers are calibrated and tested instruments for measuring flow in open channels. Invented by Ralf Parshal, a leading professor and student at Colorado State University, this device is based on the Venturi effect. No, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no, no,…