Nowadays, wireless communication is a tendency in industrial environments, saving resources and enabling the addition of new applications when compared to their wired counterparts. In this context, the WirelessHART and ISA100.11a specifications are emerging as a solution for the last mile connection. Despite their high degree of applicability, due to the nature of its technical challenges (reliability, energy consumption, fault tolerance, ensuring constant delays), industrial wireless networks used, in the majority of applications, for monitoring processes. Given the aforementioned and and the necessity of the industry to use this new technology, the demand for evaluation and assured reliability tools on the control loops is imminent. Aiming to demystify the use of wireless technology on the control loops in the industry, this paper presents a practical experiment of evaluation and comparison that enables the analysis of the behavior of typical ISA100.11a and WirelessHART networks in process control by controlling the level loop of Quanser’s didactic coupled tanks module and Festo’s MPS-PA process station, respectively. The wireless networks were established with the Dust Network (SmastMesh WirelessHART Starter Kit) and Nivis (Nivis ISA100.11a Integration Kit) kits, coupled with Emerson's and Yokogawa's wireless transmitters. The developed supervisory application monitors and controls the system.