The hydros branded sensors are up on cv website.
HYDROS Flow Sensors
Important Reminder: When selecting a HYDROS Flow Sensor, consider both the pipe size and the flow rate of your system. Always choose a sensor that is one size up and capable of accurately measuring the flow you are putting through the pipe. This ensures optimal performance and precise readings.
www.coralvue.com
I am ordering 3/4” tonight. They come with a pair of unions it appears. Don’t know if that’s a common inclusion with meters or not but nice at any rate.