is it a must to have a sensor modul to read data from sensors?

Dears,

If I have Arduino mega 2560 and want to read data from a nitrate, potassium, calcium and sodium sensors that has BNC connector, is it a must to have a specific module between the Arduino and Sensors to read data?

I have only seen common modules only for example, ph or EC.

Thank you very mauch for your kind recommendation, input or suggestion.

Please include datasheet links for any hardware you are talking about.

Assuming this are glass bulb type sensors, you need a pH type amplifier to read them.

EC is a very different animal, it doesn't belong in that list.