OWP will be closed from 4:00 pm on Friday, December 20, 2024, until 8:00 am on Thursday, January 2, 2025, for Winter Break.
(All times are PST.)
For students in Canada: Due to the ongoing Canada Post strike, please use UPS or FedEx to return your scantrons for grading. You may take your exams online even if you received paper exams.
| If exams are submitted: |
Course certificates will be mailed: |
| By December 13th |
By December 20th |
| After December 20th |
Early January |
Please note: Postmark dates will not be honored.
Water and Wastewater Terms Beginning P
A B C D E F G H I J K L M N O P Q R S T U V W Y Z
primary element
(1) A device that measures (senses) a physical condition or variable of interest. Floats and thermocouples are examples of primary elements. Also called a sensor. (2) The hydraulic structure used to measure flows. In open channels, weirs and flumes are primary elements or devices. Venturi meters and orifice plates are the primary elements in pipes or pressure conduits.
