An electrical outlet (230V) has to be present near the location where a bridge is mounted.
The bridge we use for the Compressed Air sensor is a Cellular Gateway that connects to the internet through a 4G connection. This bridge then connects to sensors in a range of up to 150 meters. This signal is subject to interference, as is any wireless signal, but is relatively strong compared to the bridges of our other products. As soon as the bridge is plugged in it will power up and make a connection over 4G. It will automatically connect to sensors in its range.