Open Channel Flow in Water and Wastewater Plants

Precision Digital offers many solutions for displaying and monitoring flow rate and total in water and wastewater facilities. Many water treatment plants use weirs and flumes for controlling influent flow and effluent flow of water and wastewater. The flow rate and total are measured using various types of level transmitters. Precision Digital meters like the PD6200, PD6622, and PD6820 flow rate totalizers and the ConsoliDator+, are ideal for providing a clear and convenient display of the information taken from the transmitter.

Influent flow was being measured by an ultrasonic transmitter in a Cipoletti weir. The original display could not be read in direct sunlight. A brighter display was needed.

A PD6200-6H5 meter was installed with SunBright LEDs, two relays and an isolated retransmit of the 4-20 mA. Flow rate is displayed on the top line and total on the bottom line.

Local and easy to access indication was needed for an ultrasonic transmitter measuring effluent flow through a Parshall flume at a wastewater treatment plant.

A PD6622 loop-powered meter mounted in a PDA2811 NEMA 4X enclosure provides an eye level display of both flow rate and totalization of effluent from the plant.

Effluent Flow

Solution

Though the application did not require an explosion-proof meter, the customer chose the PD6820 for its rugged NEMA 4X/IP66 enclosure. The top line is displaying million gallons per day and the bottom line is displaying total gallons.