How to receive data from Industrial IoT Wireless Vibration Temperature Sensor V3 to my own gateway without the moden

Just following up here please?

If we use an ethernet modem will the data from the RS485 just be streamed to TCP?
We could build an on-premise server application to handle this?

Correct…
This is how it will work
RS485 device >>> RS485 modem === wireless ======= Ethernt modem