The Water Supply Test set and your pitot gauge is all you need to tackle water supply tests all on your own.  The NIST certified 0.5% accuracy digital Pressure Sender quickly attaches to the included fire hydrant test cap and transmits pressure up to 3000' away.  This allows a lone operative the ability to see real time pressure while they are elsewhere, probably controlling a water flow valve.  Careful, it may cause you to feel like you've had an out of body experience and were in two places at once.  

 

A large 3.1" daylight readable LCD display makes it easy to see pressure at a glance while you are working, and LEDs give a visual indication of data transmission.  It records 10 test records with a button push, tracks max psi, flow and usage, and shows battery life for itself and connected nodes.  You can set options like PSI Target Alert to get a visual when pressure dropped 25%, change radio range to get up to 3000' line of sight, and more.

 

The hard case is far nicer than the rugged IP65 rated case needs but its integrated charging ports are handy to keep the built in li-ion batteries topped up with an external USB-C charge port.  With 30 hours continuous operation battery life, you can get in a lot of water flow testing first. 

 

Save time and resources when conducting fire hydrant flow tests!  One person can conduct a water flow test by utilizing a Pressure Sender on the test hydrant that sends real time readings to the display.  The person controlling the water flow can now see instant pressure readings to prevent water hammer spikes and avoid costly repairs.

You can add a 2nd Pressure Sender with flow calc enabled to put on your flow diffuser and see residual pressure and flow simultaneously.
 

Range: The range of a wireless signal is always limited by obstructions. Transmitting through machines, walls, and structures degrades signal strength and reduces range capability. In this environment you can expect 800' of range.  Located outdoors there are typically less obstructions and with either line of site or limited buildings in between the transmitter range will be 3000'-3500'. 
The pressure sender made us include that cause we keep selling him short saying 800' when he can go 3000' and he wasn't happy when we told him length doesn't matter.