Industrial pH Meter lifespan

in the [product](https:// Industrial pH Meter/ Sensor MODBUS-RTU RS485 & 0~2V Analog Voltage (S-pH-01A) V2.0) description says “Robustness: suitable to be immersed in soil or water for a long time”
are there more info on what “long time” refers to ?

how long is the lifespan for the sensor immersed continuously in
a. tap water environment
b. in potting soil environment

thanks in advance