This disclosure describes embodiments of a system and device (100) for measuring corrosive components suspended in air flowing to a turbo-machine (102). The device (100) comprises a fluid circuit (202) with a detection module (206) having a sensing element disposed in a manifold (330). The manifold (330) surrounds the sensing element to prevent mixing of the flow of sample air in the manifold (330) with air from the surrounding environment. In one example, the fluid circuit also comprises a fluid flow module with elements, such as a pressure meter (326) or a flow meter (324), to monitor flow characteristics of the flow of sample air. Operation of the fluid flow module can effectuate changes in flow characteristics of the flow of sample air to optimize detection of the corrosive components.