Can someone recommend the type of level measurement device to use to measure the level in a sump tank?
The sump tank is used to collect wastewater from the municipality. The tank is an open tank (not a pressurized tank). Please advise

Media: Wastewater
Application: sump tank
Temperature: 50 Deg C
Sump Tank Height: 10 Meter Max
Output: 4-20mA
Supply Voltage: 24VDC

 

See our waterlevel meters on this page https://cascade.net/en/products-for-waste-water-and-well-monitoring/

 

Bubblers are still used for sump level measurement, where compressed air bubbles out of a vertical pipe in the sump. The pressure of the air in vertical pipe needed to create bubbles equals the hydrostatic pressure of the liquid in the sump. A pressure transmitter measures the air pressure in the pipe and its signal can be used for display or sump level control. A constant flow regulator (also known as pneumatic differential relay) regulates the air flow to minimize air consumption. Reliable, century old technology.

 

A modern approach is a through-air radar level transmitter; there are devices available for as low as 750 USD.