The Arc™ Wi 2G Adapter. from Hamilton Co.,  not only provides wireless communication, but also simplifies analog connection of Arc sensors to the process control system (PCS). The Arc Wi 2G adapter (second generation Arc wireless adapter) includes an additional internal galvanic isolator for enhanced signal quality. Connection to the process control system is simplified to four wires, consisting of the two-wire power supply and the two-wire 4-20 mA interface.